Banana Boosters Manufacturer & Exporter Company in USA - Indogulf BioAg. Organically Certified by Indocert. For product related enquiry contact us at +1 437 774 3831 < Crop Kits Banana Boosters Banana Boosters enhances banana crop resilience, quality, and yield by mitigating chilling injury and optimizing nutrient mobilization, stress tolerance, and fruit development. Using eco-friendly microbial agents and growth regulators, it promotes bunch elongation, cell expansion, and stronger stem structure for improved fruit size and resilience. Product Enquiry What Why How What it is Banana Boosters enhances banana crop resilience, quality, and yield by mitigating chilling injury and optimizing nutrient mobilization, stress tolerance, and fruit development. Using eco-friendly microbial agents and growth regulators, it promotes bunch elongation, cell expansion, and stronger stem structure for improved fruit size and resilience. Why is it important Banana Boosters addresses key challenges in banana production, such as chilling injury, nutrient inefficiency, and stress from drought or salinity. By enhancing resilience and fruit quality, it supports sustainable banana yields, critical for meeting global food demands and ensuring marketable produce. How it works Banana Boosters combines eco-friendly microbial agents to reduce chilling injury with growth regulators like Brassinolide, CPPU, and Nano Silica, which improve nutrient mobilization, stress tolerance, and fruit structure. This targeted approach promotes cell expansion, bunch elongation, and stronger stems, resulting in larger, high-quality bananas. Banana Boosters Our Products Explore our premium Banana Boosters, designed to enhance nutrient absorption, improve fruit quality, and increase stress tolerance in banana crops—maximizing growth and yield for thriving harvests. Bunch Booster Bunch Booster enhances banana growth and yield by improving nutrient mobilization, stress tolerance, and fruit quality. Using Brassinolide, CPPU, ANAA, and Nano Silica, it promotes cell expansion, bunch elongation, and structural resilience, resulting in larger, stronger bunches and high-quality fruits. View Species Chilbloc Chilling injury of fruits can be alleviated by physical techniques such as low temperature conditioning, heat treatment, controlled or modified atmosphere storage, waxing, and microbial control. Chilbloc alleviates the pressure of chilling injury using microbial species that are effective and safe for the environment. View Species 1 1 ... 1 ... 1 Resources Read all

Rhodospirillum molischianum is a phototrophic bacterium known for its role in anoxygenic photosynthesis. It uses bacteriochlorophylls to capture light energy and metabolize organic compounds, thriving in low-oxygen aquatic and soil environments. This bacterium contributes to carbon cycling and plays a role in ecosystem nutrient balance. Its well-studied light-harvesting complexes make it a model organism for research into photosynthetic mechanisms and bioenergetics, with potential applications in bioenergy and environmental management. < Microbial Species Rhodospirillum molischianum Rhodospirillum molischianum is a phototrophic bacterium known for its role in anoxygenic photosynthesis. It uses bacteriochlorophylls to capture light energy and metabolize organic compounds, thriving in low-oxygen aquatic and soil environments. This bacterium contributes to carbon cycling and plays a role in ecosystem nutrient balance. Its well-studied light-harvesting complexes make it a model organism for research into photosynthetic mechanisms and bioenergetics, with potential applications in bioenergy and environmental management. Strength 1 x 10⁹ CFU per gram / 1 x 10¹⁰ CFU per gram Product Enquiry Download Brochure Benefits Hydrogen Production Capable of producing hydrogen gas, offering potential for renewable energy solutions. Soil Health Enhancement Improves nutrient cycling in soils, promoting plant growth and ecosystem vitality. Photosynthetic Growth Utilizes light energy for metabolic processes, supporting sustainable biomass production. Organic Pollutant Biodegradation Effectively degrades organic contaminants, contributing to bioremediation efforts. Dosage & Application Additional Info Scientific References Mode of Action Sustainability Advantage FAQ Scientific References Content coming soon! Mode of Action Content coming soon! Additional Info Contact us for more details Dosage & Application Contact us for more details FAQ Content coming soon! Sustainability Advantage Content coming soon! Related Products Saccharomyces cerevisiae Bacillus polymyxa Thiobacillus novellus Thiobacillus thiooxidans Alcaligenes denitrificans Bacillus licheniformis Bacillus macerans Citrobacter braakii More Products Resources Read all

Pseudomonas stutzeri is a versatile bacterium essential in the nitrogen cycle, performing denitrification to convert nitrates into nitrogen gas, aiding in nitrogen balance and pollution reduction. Its ability to degrade hydrocarbons, pesticides, and heavy metals makes it a key player in bioremediation and wastewater treatment. Additionally, it supports sustainable agriculture through phosphate solubilization and plant growth promotion. Its adaptability and diverse metabolic capabilities position it as a valuable organism for environmental restoration and biotechnological applications. < Microbial Species Pseudomonas stutzeri Pseudomonas stutzeri is a versatile bacterium essential in the nitrogen cycle, performing denitrification to convert nitrates into nitrogen gas, aiding in nitrogen balance and pollution reduction. Its ability to degrade hydrocarbons, pesticides, and heavy metals makes it a key player in bioremediation and wastewater treatment. Additionally, it supports sustainable agriculture through phosphate solubilization and plant growth promotion. Its adaptability and diverse metabolic capabilities position it as a valuable organism for environmental restoration and biotechnological applications. Strength 1 x 10⁹ CFU per gram / 1 x 10¹⁰ CFU per gram Product Enquiry Download Brochure Benefits Nitrogen Fixation Capable of fixing atmospheric nitrogen, enhancing soil fertility and supporting plant growth. Soil Health Improvement Contributes to nutrient cycling in soil, promoting overall soil health and ecosystem balance. Pollutant Degradation Effectively degrades a wide range of organic pollutants, aiding in environmental cleanup. Bioremediation Role Plays a crucial role in bioremediation processes, especially in the degradation of hydrocarbons and heavy metals. Dosage & Application Additional Info Scientific References Mode of Action Sustainability Advantage FAQ Scientific References Content coming soon! Mode of Action Content coming soon! Additional Info Contact us for more details Dosage & Application Contact us for more details FAQ Content coming soon! Sustainability Advantage Content coming soon! Related Products Saccharomyces cerevisiae Bacillus polymyxa Thiobacillus novellus Thiobacillus thiooxidans Alcaligenes denitrificans Bacillus licheniformis Bacillus macerans Citrobacter braakii More Products Resources Read all

Hirsutella Thompsonii is a beneficial fungus used to control various small arachnids such as mites. It produces spores that penetrate the mite's cuticle, leading to paralysis and death. < Microbial Species Hirsutella thompsonii Hirsutella Thompsonii is a beneficial fungus used to control various small arachnids such as mites. It produces spores that penetrate the mite's cuticle, leading to paralysis and death. Strength 1 x 10⁸ CFU per gram / 1 x 10⁹ CFU per gram Product Enquiry Download Brochure Benefits Effective mode of action Infects mites through their body contact, leading to paralysis and death. Rapid population reduction Quickly reduces and eliminates mite populations without developing resistance. Environmentally friendly Hirsutella thompsonii is safe for the environment and non-target organisms. High specificity Targets a range of mites and small arachnids while being safe for other organisms. Dosage & Application Additional Info Scientific References Mode of Action Sustainability Advantage FAQ Scientific References Content coming soon! Mode of Action Content coming soon! Additional Info Target pests: Red spider mites, Yellow mites, Eriophid mites, Broadmites. Recommended Crops: Cereals, Millets, Pulses, Oilseeds, Fibre Crops, Sugar Crops, Forage Crops, Plantation crops, Vegetables, Fruits, Spices, Flowers, Medicinal crops, Aromatic Crops, Orchards, and Ornamentals. Compatibility: Compatible with Bio Pesticides, Bio Fertilizers, and Plant growth hormones but not with chemical fertilizers and chemical pesticides. Shelf Life: Stable within 1 year from the date of manufacturing. Packing: We offer tailor-made packaging as per customers' requirements. Dosage & Application Wettable Powder: 1 x 10⁸ CFU per gram Foliar Application 1 Acre dose: 2 kg 1 Ha dose: 5 kg Foliar Application for Long Duration Crops / Orchards / Perennials 1 Acre dose: 2 kg 1 Ha dose: 5 kg Apply 2 times a year: before onset of monsoon and after monsoon Soluble Powder: 1 x 10⁹ CFU per gram Foliar Application 1 Acre dose: 200 g 1 Ha dose: 500 g Foliar Application for Long Duration Crops / Orchards / Perennials 1 Acre dose: 200 g 1 Ha dose: 500 g Apply 2 times a year: before onset of monsoon and after monsoon Application Methods Foliar Application Method Mix Hirsutella Thompsonii at recommended doses in sufficient water and spray on foliage. Apply twice a year for long-duration crops. It is recommended to have the first application before the onset of the main monsoon/rainfall/spring season and the second application after the main monsoon/rainfall/autumn/fall season. Note Do not store Hirsutella Thompsonii solution for more than 24 hours after mixing in water. Temperature and relative humidity are very critical. Very high or very low temperature and very high or low humidity is not suitable for fungal growth. A fraction of the product may not be soluble in water. It is advisable to filter and discard undissolved residue and use the filtered liquid for spraying or feeding through drip irrigation. FAQ Content coming soon! Sustainability Advantage Content coming soon! Related Products Beauveria bassiana Isaria fumosorosea Lecanicillium lecanii Metarhizium anisopliae Nomuraea rileyi More Products Resources Read all

Leading manufacturer & exporter of Mykrobak Fog, providing eco-friendly environmental solutions for effective air & surface disinfection. < Environmental Solutions Mykrobak Fog Mykrobak FOG uses active microbes to rapidly break down fats, oils, and greases in grease traps and wastewater systems. Includes Bacillus strains and surfactants for effective biodegradation. Product Enquiry Download Brochure Benefits Fat, Oil & Grease Degradation Degrades fat, oil, and grease from wastewater. Complex Molecular Breakdown Breaks down complex chain molecular structures of oil into simpler forms. Foam Reduction Reduces foaming in biological tanks, ensuring stable operation. Reduces Organic Matter Accumulation Reduces accumulation of organic matter on tank surfaces. Composition Dosage & Application Additional Info FAQ Composition Performance properties PH 6.5 – 7.5 Temperature 5 to 55°C Reactivation Rate 99% After addition to water Concentration Highly Concentrated Shelf Life 2 years Physical properties Appearance Off White Colour Physical State Powdered Form Odour Odourless Moisture Content 6-7% Mesh Size 0.6 mm Packaging 1 kg Aluminum zip lock Dosage & Application Dosage Schedule Depend upon the FOG content, contaminants and volume of waste water. Area of Application Activated sludge Process Sequencing batch reactor Moving bed bio reactor Extended Aeration system Oil & grease Trap Application Matrix Mix MYKROBAK 1 kg powder in 20 Liter water (Prefer normal temperature) Stir well and remain in bucket for 30 minutes (for bacteria activation) Directly Dose at inlet of tank Additional Info Bacterial consortium belongs to the following: Hydrocarbon-reducing bacteria Hydrolytic bacteria Hyperthermophilic and thermophilic bacteria Nitrifying and denitrifying bacteria Photosynthetic bacteria & fluorescent bacteria Fermentative bacteria Acetogenic bacteria Odour control bacteria Enzymes belong to the co-enzymes of the following groups: Oxidoreductases Transferases Lyases Advantages of Mykrobak products: Promote the formation of potential and sustainable biomass Reduce contaminants, toxicity, pollutants, and bad odors Initiate biodegradation quickly Effective in reducing COD/BOD in ETP/STP/WTP Help in the fastest commissioning of biological treatment processes in ETP/STP, etc. Boost MLSS production rapidly Reduce ammoniacal nitrogen Improve digester system recovery Increase the efficiency of biogas production Improve tertiary treatment Reduce large quantities of organic compounds Improve the aquatic environment Clarify ponds and lakes water Safe and natural Economically feasible FAQ Content coming soon! Related Products Mykrobak Aerobic Mykrobak Anaerobic Wastewater Treatment Mykrobak Biotoilet Mykrobak Composting Mykrobak Dairy Mykrobak Drop Mykrobak N&P Booster Mykrobak Nutrients Remover More Products Resources Read all

< Animal Health Grass Mask Grass Mask is a natural feed additive formulated for improving the feed intake of cattle and enabling compounders to mask the odor of unconventional feed ingredients that have high nutritional value. Product Enquiry Benefits Masks Odors of Unconventional Ingredients Allows the use of alternative feed materials by effectively concealing undesirable smells, improving feed acceptance. Boosts Feed Intake and Appetite Encourages better feed consumption through improved palatability, supporting consistent growth and health. Supports Flexible Feed Formulation Enables compounders to diversify feed compositions without compromising intake, maintaining nutritional balance. Reduces Feed Cost and Enhances Nutrient Efficiency Improves the overall cost-effectiveness of feed by increasing the net nutrient value delivered to cattle. Component Amount per kg Bacillus Subtilis 2 × 10⁹ CFU Lactobacillus Acidophilus 1 × 10⁹ CFU Lactobacillus Casei 1 × 10⁹ CFU Bifidobacterium 1 × 10⁹ CFU Aspergillus Oryzae 1 × 10⁹ CFU Yeast Culture 10 Billion CFU Sodium 100 mcg Potassium 50 mcg Magnesium 50 mcg Vitamin A 50,000 IU Vitamin D3 30,000 IU Alpha Amylase 60,000 units Beta Glucanase 30,000 units Xylanase 60,000 Lysine 100 mcg Choline 150 mcg Methionine 150 mcg Composition Distinction FAQ Additional Info FAQ Content coming soon! Dosage & Application Content coming soon! Additional Info Content coming soon! Related Products Stress Pro Camel Care Pro Cattle Care Max Cattle Care Pro Feed Pro Lactomine Pro Lactomix Mineral Max Pastocare Calf Pro More Products Resources Read all

Penicillium Citrinum, a beneficial fungus, solubilizes soil manganese, recommended for deficient soils. It also accelerates soil organic matter decomposition, increasing manganese availability. < Microbial Species Penicillium citrinum Penicillium Citrinum, a beneficial fungus, solubilizes soil manganese, recommended for deficient soils. It also accelerates soil organic matter decomposition, increasing manganese availability. Strength 1 x 10⁸ CFU per gram / 1 x 10⁹ CFU per gram Product Enquiry Download Brochure Benefits Enhances photosynthetic efficiency and promotes faster, uniform seed germination Aids in manganese solubilization, improving plant performance during growth. Stimulates robust root development Enhances nutrient and water uptake, thereby increasing plant resilience, particularly in dry conditions. Optimizes nutrient availability and physiological processes Improves overall plant health and vigor through enhanced nutrient absorption and growth processes. Contributes to improved crop quality, increased biomass, and better yield outcomes in agriculture Enhances agricultural productivity and harvest quality through optimized plant growth and development. Dosage & Application Additional Info Scientific References Mode of Action Sustainability Advantage FAQ Scientific References Content coming soon! Mode of Action Content coming soon! Additional Info Recommended Crops: Cereals, Millets, Pulses, Oilseeds, Fibre Crops, Sugar Crops, Forage Crops, Plantation crops, Vegetables, Fruits, Spices, Flowers, Medicinal crops, Aromatic Crops, Orchards, and Ornamentals. Compatibility: Compatible with Bio Pesticides, Bio Fertilizers, and Plant growth hormones but not with chemical fertilizers and chemical pesticides. Shelf Life: Stable within 1 year from the date of manufacturing. Packing: We offer tailor-made packaging as per customers' requirements. Dosage & Application Seed Coating/Seed Treatment : Prepare a mixture of 10 - 15 grams of Corynebacterium Spp. in a sufficient amount of water to create a slurry. Coat 1 kg of seeds with this mixture, dry them in shade, and they will be ready to use in the field. Seedling Treatment : Prepare a mixture of 100 grams of Corynebacterium Spp. in a sufficient amount of water. Dip the roots of the seedlings into the solution for 30 minutes before planting. Soil Treatment : Mix 2.5 - 5 kg per hectare of Corynebacterium Spp. with organic manure or organic fertilizers. Incorporate this mixture into the soil at the time of planting or sowing. Irrigation : Mix 2.5 - 5 kg per hectare of Corynebacterium Spp. in a sufficient amount of water. Apply this mixture through drenching or drip irrigation to penetrate the root zones. FAQ How do you treat Penicillium species fungus? Treatment involves a combination of sanitation and antifungal agents. In agricultural soils, crop residue removal, proper drainage, and soil solarization help suppress Penicillium populations. In postharvest settings, fungicidal dips (e.g., thiabendazole or natamycin) and controlled-atmosphere storage reduce fungal growth. For indoor mold remediation, remove affected materials, maintain humidity below 60%, and apply EPA-registered mold cleaners or fungicides following label instructions. Is Penicillium harmful to humans? Most Penicillium species are benign or beneficial, but a few (e.g., P. marneffei ) can cause opportunistic infections in immunocompromised individuals. Allergic reactions and respiratory symptoms may occur from inhaled spores. Proper ventilation and mold control minimize health risks. What species is Penicillium? Penicillium is a large genus in the phylum Ascomycota, comprising over 350 species. Notable species include P. chrysogenum (penicillin producer), P. roqueforti (cheese ripening), P. citrinum (manganese solubilizer), and P. expansum (fruit rot pathogen). Is Penicillium mold black mold? Penicillium species are not the same as Stachybotrys chartarum, the notorious “black mold.” While some Penicillium colonies appear blue-green or grayish, they are distinct genera with different toxin profiles and health impacts. What are the uses of Penicillium species? Antibiotic production ( P. chrysogenum → penicillin) Food processing (cheese ripening by P. roqueforti and P. camemberti ) Biocontrol of soil pathogens ( P. citrinum and other antagonists) Industrial enzyme production (e.g., pectinases, cellulases) Bioremediation and nutrient cycling in soils What are the common Penicillium species? Common species include: P. chrysogenum (antibiotic producer) P. roqueforti (blue cheese) P. camemberti (Camembert and Brie) P. expansum (postharvest fruit rot) P. citrinum (mineral solubilization) P. italicum (citrus fruit rot) How to identify Penicillium species? Identification relies on: Colony morphology (texture, color, growth rate on agar) Microscopic features (conidiophore branching patterns, spore size/shape) Molecular methods (DNA sequencing of ITS and β-tubulin genes) Biochemical tests (enzyme activity profiles) What are the health effects of Penicillium species? Most species are harmless in healthy individuals. Potential health effects include: Allergic reactions: sneezing, coughing, watery eyes Respiratory irritation from spore inhalation Opportunistic infections in immunocompromised people ( rare , e.g., P. marneffei ) Mycotoxin exposure from species producing citrinin or patulin in contaminated food Sustainability Advantage Content coming soon! 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< Crop Kits Root Knot Nematodes Root knot nematodes cause galls on roots, affecting nutrient uptake and stunting growth. Soil management and resistant varieties are vital. Product Enquiry Download Brochure Benefits Composition Dosage & Application Additional Info Dosage & Application Additional Info Related Products Aminomax SP Annomax BioProtek Biocupe Neem Plus Seed Protek Silicomax Dates Pro More Products Resources Read all

Bradyrhizobium elkanii a bacterium that forms symbiotic relationships with legume roots, significantly improving nitrogen availability in the soil, which is essential for leguminous crop production. < Microbial Species Bradyrhizobium elkanii Bradyrhizobium elkanii a bacterium that forms symbiotic relationships with legume roots, significantly improving nitrogen availability in the soil, which is essential for leguminous crop production. Strength 1 x 10⁸ CFU per gram / 1 x 10⁹ CFU per gram Product Enquiry Download Brochure Benefits Nitrogen Fixation Bradyrhizobium elkanii forms symbiotic relationships with leguminous plants, fixing atmospheric nitrogen into ammonia, which enhances soil fertility and plant growth. Enhanced Nutrient Availability It enhances the availability of essential nutrients such as phosphorus and iron to the host plant, contributing to improved plant health and yield. Stress Tolerance Bradyrhizobium elkanii produces stress-protective compounds like exopolysaccharides, aiding plants in coping with environmental stresses such as drought and salinity. Biocontrol Agent It competes with pathogenic microorganisms in the rhizosphere, helping to suppress plant diseases and promote healthier plant growth. Dosage & Application Additional Info Scientific References Mode of Action Sustainability Advantage FAQ Scientific References Scientific References and Molecular Mechanisms of Symbiosis (2025 Update) Overview of Bradyrhizobium elkanii Symbiotic Signaling The establishment of B. elkanii-legume symbiosis is a sophisticated molecular dialogue involving plant-derived signals (flavonoids), bacterial Nod factors (NFs), Type III secretion system (T3SS) effectors, and host-encoded resistance proteins. This intricate regulatory network determines host specificity, nodule organogenesis, and nitrogen fixation efficiency. 1. Molecular Signaling Initiation Flavonoid-Mediated Activation Host-to-Bacterium Signal:Legume roots experiencing nitrogen starvation exude flavonoid compounds (e.g., genistein, daidzein, luteolin) into the rhizosphere. These flavonoids penetrate the B. elkanii cell membrane and bind to the NodD regulatory protein, a member of the LysR family of transcriptional regulators. Key Research Findings: Flavonoid concentrations as low as 10⁻⁸ M activate nod gene expression in B. elkanii Different legume species exude distinct flavonoid profiles, contributing to host specificity Transcription of the nodYABCSUIJnolMNOnodZ operon is directly dependent upon NodD-flavonoid complexes TtsI (transcriptional activator of T3SS) is also responsive to flavonoids and coordinates both Nod factor and T3SS expression Regulatory Architecture The B. elkanii regulatory circuit involves: NodD: LysR-type regulator controlling nod gene expression NodW: Regulatory protein modulating flavonoid recognition TtsI: Transcriptional regulator of T3SS genes, activated by plant flavonoids Coordination of these regulators ensures spatiotemporal expression of symbiotic genes 2. Nod Factor Biosynthesis and Host Recognition Structure and Function Nod Factors (NFs):Nod factors are lipochitooligosaccharides (LCOs) comprising a backbone of 3–5 N-acetyl-D-glucosamine (GlcNAc) units with a long-chain fatty acyl group (C16–C18) attached to the non-reducing terminus. Nod Gene Clusters in B. elkanii: nodA: Encodes N-acetyl transferase; transfers the acyl chain to the GlcNAc backbone nodB: N-acetyl lyase; removes N-acetyl group from the non-reducing terminus nodC: Chitin synthase; synthesizes the GlcNAc backbone nodS, nodU, nodI, nodJ: Involved in modification and transport of Nod factors nodZ: Encodes a glucosidase involved in Nod factor modification for B. elkanii-specific legume recognition Nod Factor Modification B. elkanii produces modified Nod factors unique to this species: Acetyl substitution patterns differ between strains Host-specific decorations on the oligosaccharide backbone determine compatibility with legume receptors (NFRs: Nod Factor Receptors) Molecular recognition is highly specific; B. elkanii NF structure triggers nodulation in soybean (Glycine max), but not in hosts compatible with other rhizobia Structural Variations and Host Specificity B. elkanii genomes harbor extensive nodulation gene repertoires: Multiple nod gene variants on symbiotic islands allow synthesis of a spectrum of Nod factor structures Comparative genomic analysis reveals gene duplications and deletions affecting Nod factor decoration These variations contribute to the competitive nodulation phenotype of B. elkanii and its ability to nodulate multiple legume hosts at variable efficiency 3. Type III Secretion System (T3SS) and Effector Proteins T3SS Architecture The T3SS is a molecular syringe-like apparatus embedded in the bacterial cell envelope that delivers effector proteins (Nops: nodulation outer proteins) directly into host plant cells. T3SS Components in B. elkanii: RhcJ: Outer membrane channel protein RhcV: Inner membrane channel protein RhcQ: ATPase providing energy for protein secretion RhcC, RhcD, RhcE, RhcF: Basal body proteins FlhA, FliK, FliP: Apparatus assembly proteins Transcriptional Control: T3SS gene expression is controlled by TtsI (transcriptional activator) TtsI is activated by plant flavonoids, creating a coordinated response with Nod factor synthesis The T3SS is activated only in the presence of compatible plant roots, preventing wasteful energy expenditure in the soil T3SS Effector Proteins and Functions NopL: Key Determinant for Nodule Organogenesis Function: NopL is among the most critical T3SS effectors, particularly for B. elkanii USDA61 symbiosis with certain legume species (e.g., Vigna mungo). NopL-deleted mutants form infection threads on Vigna mungo roots but fail to establish nodules, indicating its essential role in nodule primordia formation NopL is exclusively conserved among Bradyrhizobium and Sinorhizobium genera, suggesting ancient evolutionary origin Phylogenetic analysis indicates NopL diverged from the canonical T3SS lineage, suggesting specialized symbiotic function Mechanism: NopL enters host cell nuclei and likely interacts with plant transcription factors Suppresses host immune responses that would otherwise block infection Triggers expression of early nodulation genes required for meristem initiation Bel2-5: NF-Independent Nodulation Effector Dual Functions: In some legumes (e.g., soybean nfr1 mutants), Bel2-5 can trigger nodulation independently of Nod factors In soybean carrying the Rj4 allele (dominant resistance gene), Bel2-5 acts as a virulence factor, triggering immune responses that prevent infection Structural Features: Contains ubiquitin-like protease (ULP) domain Two EAR (ethylene-responsive element-binding factor-associated amphiphilic repression) motifs for transcriptional regulation Nuclear localization signal (NLS) enabling entry into plant cell nuclei Internal repeat sequences with unknown function Shares structural similarity with XopD from the plant pathogen Xanthomonas campestris pv. vesicatoria Domain-Function Correlation: The C-terminal ULP domain and upstream regions are critical for Bel2-5-dependent nodulation phenotypes Mutations in EAR motifs abolish nodulation ability Deletion of NLS impairs nuclear targeting and symbiotic function InnB: Strain-Specific Symbiotic Modulator Host-Specific Effects: InnB promotes nodulation on Vigna mungo cultivars InnB restricts nodulation on Vigna radiata cv. KPS1 This differential phenotype reflects distinct recognition mechanisms in different legume species Expression and Localization: innB expression is flavonoid-dependent and TtsI-regulated InnB protein is secreted via T3SS and translocated into host cells Adenylate cyclase assays confirm T3SS-dependent translocation into nodule cells NopM: Ubiquitin Ligase Triggering Senescence Function: NopM triggers early senescence-like responses in incompatible hosts (e.g., Lotus species). Possesses E3 ubiquitin ligase domain and leucine-rich-repeat domain Acts similarly to PAMP-triggered immunity (PTI) and effector-triggered immunity (ETI) in pathogenic bacteria Mediates ubiquitination of host target proteins, leading to degradation and immune responses Results in browning of nodules and disrupted symbiosis Phylogenetic Conservation: NopM homologs are found in both pathogenic and symbiotic bacteria, highlighting the evolutionary relatedness of virulence and symbiotic mechanisms NopF: Infection Thread Inhibitor Role in Host Specificity: NopF triggers inhibition of infection thread formation in Lotus japonicus Gifu Represents a post-recognition checkpoint for host-pathogen compatibility Allows alternative legume accessions (L. burttii, L. japonicum MG-20) to proceed with symbiosis, despite presence of NopF NopP2: Fine-Tuning Symbiotic Efficiency Function: NopP2 fine-tunes symbiotic effectiveness with Vigna radiata. Located within the symbiotic island near the nif cluster Differential effects depending on host genotype and strain background Contributes to variable nodulation phenotypes among B. elkanii strains 4. Host Specificity and Rj Gene-Mediated Resistance The Rj Gene System in Soybean Soybean (Glycine max) possesses a dominant host resistance system controlled by Rj (Rejection) genes that restrict nodulation by specific Bradyrhizobium strains. Rj4 Gene: Encodes a thaumatin-like protein (TLP), a member of the pathogenesis-related (PR-5) protein family Structurally similar to plant anti-fungal proteins Restricts nodulation by many B. elkanii strains, particularly Type B strains (e.g., USDA61) Soybean cultivars carrying Rj4 are incompatible with B. elkanii but compatible with Bradyrhizobium diazoefficiens USDA110 Rj2 Gene: Encodes a TIR-NBS-LRR protein (Toll-interleukin receptor/nucleotide-binding site/leucine-rich repeat) Represents a receptor-like immune protein structurally similar to plant R proteins for pathogen resistance Critical amino acid I490 (isoleucine) in Rj2 determines incompatibility with Bradyrhizobium diazoefficiens USDA122 Restricts specific rhizobial strains but allows infection by compatible strains Rj3 Gene: Restricts B. elkanii Type B strains (e.g., BLY3-8, BLY6-1, USDA33) despite allowing nodulation by B. japonicum USDA110 T3SS and its effectors are critical for Rj3-mediated incompatibility Mutations in T3SS components (TtsI, RhcJ) overcome Rj3 restriction, confirming T3SS involvement Gene-for-Gene Model of Symbiotic Specificity The B. elkanii-soybean system exemplifies a gene-for-gene interaction: Bacterial avirulence gene (avr): T3SS effector genes (e.g., nopL, bel2-5, nopM) function as avirulence determinants Plant resistance gene (R): Soybean Rj genes encode receptors recognizing effector-triggered immune responses Incompatibility occurs when bacterial effector matches soybean R gene recognition specificity Compatibility requires bacterial effectors that evade or suppress Rj-mediated immunity 5. Infection and Nodule Development Infection Thread Formation Stages: Pre-infection: Nod factors bind to NFR1/NFR5 receptors on legume root epidermis, activating early symbiotic signaling Infection initiation: B. elkanii invades through root hair curling (Nod factor-dependent) or via crack entry (T3SS-dependent in certain genotypes) Intercellular infection: Bacteria travel through infection threads (wall-bound tubular structures) into the cortex Release and bacteroid formation: Bacteria are released into cortical cells and enclosed within plant-derived peribacteroid membranes Role of T3SS in Infection Nod factor-independent nodulation: B. elkanii T3SS effectors (particularly Bel2-5) can trigger nodulation of soybean nfr1 mutants lacking functional Nod factor receptors Infection thread progression: T3SS suppresses plant defense responses (ROS production, ethylene synthesis) that normally block infection thread elongation Bacterial release: T3SS effectors facilitate bacterial transition from infection threads into cortical cells for bacteroid development Nodule Organogenesis and Development Transcriptional Reprogramming: B. elkanii T3SS effectors and Nod factors activate soybean early nodulation genes: ENOD40, ENOD93, NIN (Nodule Inception), NSP1, NSP2 These plant genes activate meristem-like programs in cortical cells, initiating nodule primordia Coordinated T3E activity (NopL, Bel2-5, NopP2) is essential for primordia formation Nodule Maturation: Infected cells undergo endoreduplication (multiple rounds of DNA replication without cell division) Cortical cells expand to accommodate dividing bacterial cells Peribacteroid membranes establish nutrient exchange compartments Gibberellin Role: B. elkanii synthesizes gibberellin precursor (GA₉) via cytochrome P450 monooxygenase Host soybean expresses GA 3-oxidases (GA3ox) within nodules, converting GA₉ to bioactive GA₄ GA₄ regulates nodule size, influences meristem bifurcation, and modulates senescence Higher GA levels correlate with increased nodule size and bacterial progeny, providing selective advantage to GA-producing strains 6. Nitrogen Fixation Biochemistry Nitrogenase Enzyme Complex Components: Component I (MoFe protein): Contains molybdenum and iron clusters Component II (Fe protein): Contains iron-sulfur cluster; transfers electrons to Component I Electron donors: Bacteroid respiration provides reducing power; organic acids (malate, α-ketoglutarate) drive electron transport Catalytic Reaction:[ \text{N}_2 + 8 e^- + 16 \text{ATP} \to 2 \text{NH}_3 + \text{H}_2 + 16 \text{ADP} + 16 P_i ] Key Features: Requires strictly anaerobic conditions (oxygen sensitivity) Demands substantial ATP input (~16 molecules ATP per N₂ molecule fixed) B. elkanii bacteroids express oxygen-scavenging mechanisms including leghemoglobin synthesis Oxygen Management in Nodules Oxygen Gradient: Outer nodule layers maintain aerobic respiration for ATP generation Interior nodule zones remain anaerobic for nitrogenase activity B. elkanii respiration consumes oxygen in bacterial layers, maintaining hypoxia in nitrogenase-active compartments Oxygen-Protective Mechanisms: Leghemoglobin (plant-encoded, bacteroid-synthesized iron-containing protein) buffers oxygen at nanomolar levels, preventing nitrogenase inactivation Bacteroid differentiation produces enlarged, polyploid cells with reduced permeability to oxygen Expressed late nodulation proteins (Nols) contribute to oxygen protection Metabolic Integration Carbon-Nitrogen Balance: Host plants provide carbohydrates (photosynthetically-derived organic acids) to bacteroids B. elkanii oxidizes organic acids via citric acid cycle and electron transport chains, generating ATP and reducing equivalents for nitrogenase Efficient strains (e.g., B. elkanii USDA76) show higher enzyme levels for Nod factor synthesis and metabolic integration Ammonia Utilization: Ammonia fixed by nitrogenase is rapidly assimilated via glutamine synthetase (GS) in bacteroids However, much ammonia is excreted to host cells, where plants incorporate it into amino acids (glutamine, aspartate) Plant cells return nitrogen to bacteroids as amino acids and organic compounds, establishing exchange equilibrium 7. Regulatory Networks and Gene Expression NifA-RpoN Regulatory Circuit NifA: Sigma-54-dependent transcriptional activator controlling expression of nitrogen fixation (nif) and related genes Activates nifHDK genes encoding nitrogenase structural proteins Responsive to oxygen levels; activated under microoxic conditions characteristic of nodule interiors Coordinates temporal expression of nif genes with nodule development progression RpoN: Sigma-54 RNA polymerase recognizing NifA-bound promoters Directs transcription from nif promoters bearing NifA-binding sites Links nitrogen fixation gene expression to nodule maturation stage GlnR Regulatory Protein Function: Controls nitrogen assimilation genes and cross-talks with symbiotic signaling Represses genes for nitrogen scavenging (e.g., ABC transporters) when ammonia is abundant Releases repression when ammonia becomes limiting, activating alternative nitrogen acquisition pathways Prevents metabolic conflict during high nitrogen fixation rates AdeR (Adenine Deaminase Regulator) Role: Modulates purine metabolism and symbiotic efficiency Controls genes involved in nucleotide synthesis Adjusted expression enables rapid bacterial replication in nodules while supporting biosynthesis of symbiotic proteins 8. Comparative Genomics: Symbiotic Island Architecture Symbiotic Island Composition B. elkanii genomes contain low GC-content regions (symbiotic islands) harboring symbiosis-essential genes: Island A (Main symbiotic island): ~690 kb Contains nod cluster: nodABC, nodD, nodZ, regulatory sequences Contains nif cluster: nifHDK, nifENX, fixABCX Contains fix genes (flavoproteins, cytochromes) for electron transport Island B (Small region): ~4–44 kb Variable across strains; minimal genes Island C: ~200–518 kb Contains additional metabolic and regulatory genes Variable gene content among B. elkanii strains Lateral Gene Transfer and Evolutionary Plasticity Pangenome Analysis: Bradyrhizobium pangenome: 84,078 gene families across species Core genome: 824 genes (essential cell processes) Accessory genome: 42,409 genes (including symbiotic, metabolic, stress response functions) B. elkanii genomes are moderately stable compared to highly plastic genomes of some Sinorhizobium species Genetic Variations: SNPs and indels in symbiotic islands correlate with symbiotic phenotype differences Polymorphisms in nif, fix, and nodulation regulatory genes drive intraspecific variation Integrative conjugative elements (ICEs) facilitate horizontal transfer of symbiotic genes between Bradyrhizobium strains 9. Stress Response and Environmental Adaptation Osmotic Stress Tolerance Mechanisms: Production of exopolysaccharides (EPS) and trehalose Upregulation of osmolyte synthesis under salt stress Maintenance of cell membrane integrity under water deficit Acid-Soil Adaptation pH Tolerance: Many B. elkanii strains tolerate pH 4.5–6.5, though optimal nodulation occurs at pH 6.0–7.5 Expression of acid-tolerance proteins enables survival in acidic soils Selection pressure in Brazilian Cerrado soils (naturally acidic) has generated acid-adapted B. elkanii strains Mode of Action Step-by-Step Nodulation Process Phase 1: Recognition and Signaling (Hours 0–12) Host root exudation of flavonoids B. elkanii perception and chemotaxis toward root Activation of nod gene transcription via NodD-flavonoid interaction Synthesis and secretion of Nod factors Nod factor recognition by plant NFR1/NFR5 receptors Initiation of early nodulation gene expression in plant Phase 2: Infection (Days 1–3) Root hair curling and bacterial microcolony formation Infection thread invasion through root epidermis T3SS-mediated suppression of plant defense responses Intercellular infection thread progression toward cortex Bacterial translocation into cortical cells Phase 3: Nodule Organogenesis (Days 3–7) Induction of cortical cell mitosis (meristem activation) Differentiation of nodule tissues (vascular bundle, infection zone) Bacterial release from infection threads Formation of peribacteroid membranes Nodule structure maturation Phase 4: Bacteroid Differentiation and Nitrogen Fixation (Days 7–21) B. elkanii endoreduplication and morphological differentiation Expression of nitrogenase (nif) and iron-sulfur cluster synthesis genes Establishment of microaerobic environment Initiation of nitrogen fixation Nitrogen transfer to host plant Phase 5: Sustained Symbiosis (Weeks 3–Harvest) Peak nitrogen fixation rates Continuous nitrogen supply to plant Bacterial maintenance and reproduction within nodules Age-dependent nodule senescence in late pod-fill stages Additional Info Recommended Crops: Cereals, Millets, Pulses, Oilseeds, Fibre Crops, Sugar Crops, Forage Crops, Plantation crops, Vegetables, Fruits, Spices, Flowers, Medicinal crops, Aromatic Crops, Orchards, and Ornamentals. Compatibility: Compatible with Bio Pesticides, Bio Fertilizers, and Plant growth hormones but not with chemical fertilizers and chemical pesticides. Shelf Life: Stable within 1 year from the date of manufacturing. Packing: We offer tailor-made packaging as per customers' requirements. Dosage & Application Crop Recommendations and Compatibility Compatible Legumes for B. elkanii Primary Hosts: Soybean (Glycine max) – highest efficiency and most extensively studied Peanut (Arachis hypogaea) – excellent nodulation; SEMIA 6144 strain widely used Mung Bean (Vigna radiata) – strain-dependent compatibility (USDA61 is incompatible with some cultivars) Black-Eyed Pea (Vigna unguiculata) – variable efficiency depending on strain Secondary Hosts (with strain-specific compatibility): Groundnut (Arachis hypogaea) Yard-long Bean (Vigna unguiculata subsp. sesquipedalis) Black Gram (Vigna mungo) – USDA61 strain shows exceptional specificity Broad Host Range (Associated Legumes): Various Vigna species Certain Vicia species Select native legume species Non-Host Associations (Growth Promotion Without Nodulation) B. elkanii can colonize grass roots and promote growth through: Production of plant growth hormones (IAA, gibberellins) Enhanced root development and mineral uptake Demonstrated effects on: white oats, black oats, ryegrass Associated References: Similar to Paenibacillus azotofixans, which also promotes non-legume growth through PGPR mechanisms, B. elkanii exhibits plant growth-promoting properties beyond nodulation. Compatibility with Agricultural Inputs Input Type Compatibility Notes Bio-Pesticides Compatible Use with caution; avoid simultaneous application with broad-spectrum fungicides Bio-Fertilizers Compatible Synergistic effects with phosphate-solubilizing bacteria (PSB) observed Plant Growth Hormones Compatible Enhanced effects when combined with IAA or gibberellin-producing organisms Chemical Fertilizers Incompatible Avoid high rates of urea; inhibit nodule formation and nitrogen fixation Fungicides (Broad-Spectrum) Incompatible Fungicides reduce bacterial viability; use selective agents or pre-inoculation strategies Herbicides Compatible (Selective) Most herbicides compatible; avoid herbicides with antimicrobial activity Insecticides Compatible (Most) Compatibility varies by class; pyrethroids and neonicotinoids generally safe Shelf Life and Storage Shelf Life: Stable for up to 1 year from manufacturing date under proper conditions Storage Temperature: Cool, dry conditions; maintain 4–15°C for extended viability Light Protection: Store away from direct sunlight (UV light reduces viability) Humidity: Keep in sealed containers to prevent moisture loss Monitoring: Check for discoloration, odor, or contamination before use; discard if compromised Dosage and Application Methods Seed Coating/Seed Treatment Protocol: Prepare slurry: Mix 10 g of Bradyrhizobium elkanii with 10 g crude sugar in sufficient water Coat 1 kg of seeds evenly with slurry mixture Dry coated seeds in shade before sowing (allow 2–3 hours) Sow treated seeds immediately or store in cool, dry conditions for up to 60–90 days (viability maintained with proper storage) Advantages: Simple, cost-effective, ensures bacterium-seed contact, minimal equipment Seedling Treatment (Nursery Application) Protocol: Mix 100 g of Bradyrhizobium elkanii with sufficient water Dip seedling roots into inoculant slurry for 5–10 minutes Transplant seedlings into field immediately Applications: Nursery-raised legumes (peanut, some vegetables); labor-intensive but ensures high infection rates Soil Application (Broadcasting) Protocol: Mix 3–5 kg per acre of Bradyrhizobium elkanii with organic manure or vermicompost Distribute mixture uniformly across field during land preparation Incorporate into soil by plowing or harrowing 2–3 weeks before sowing Alternatively, apply close to seeding for rapid root colonization Advantages: Builds soil population; benefits residual inoculum for crop rotations Rate: 3–5 kg/acre optimal for establishment of ~10⁷–10⁸ CFU/g soil Irrigation/Fertigation Application Protocol: Mix 3 kg per acre of Bradyrhizobium elkanii in water (1:10 ratio) Pass through 100-mesh filter to remove particles Apply via drip lines or sprinkler irrigation system Best applied in evening to reduce UV exposure Advantages: Reaches established root systems; applicable post-emergence; supports nodule maintenance Timing: Early vegetative stages (V2–V4) for maximum nodule formation FAQ General Biology and Function What makes Bradyrhizobium elkanii different from free-living nitrogen fixers like Paenibacillus azotofixans? Bradyrhizobium elkanii is a symbiotic nitrogen fixer that forms intimate associations with legume roots and establishes specialized nitrogen-fixing nodules. In contrast, Paenibacillus azotofixans is a free-living nitrogen fixer that operates independently in soil without forming nodules. B. elkanii achieves higher nitrogen fixation rates (100–300 kg N/ha/season) through symbiotic cooperation with host plants, whereas P. azotofixans supplies more modest benefits (20–50 kg N/ha depending on conditions). B. elkanii cannot infect non-legume hosts, while P. azotofixans benefits a broad range of crop species through general PGPR mechanisms. For legume cultivation, B. elkanii is the preferred choice due to superior nitrogen fixation efficiency. How does Bradyrhizobium elkanii survive in different soil conditions? B. elkanii survives through multiple strategies. As a non-spore-forming bacterium, it depends on competitive fitness and metabolic flexibility rather than dormancy. B. elkanii tolerates: Acidic soils (pH 4.5–6.5): Acid-adapted strains (e.g., from Brazilian Cerrado) have evolved acid-tolerance proteins Drought: Produces exopolysaccharides (EPS) and osmolytes for osmotic balance Salinity: Synthesizes antioxidant molecules and ionic homeostasis proteins Temperature fluctuations: Expresses heat-shock proteins and cold-adaptation proteins Nutrient starvation: Metabolic versatility supports survival on minimal carbon and nitrogen sources Survival in soils is enhanced by host plant association, which supplies carbohydrates and maintains favorable microenvironments within root nodules. Can Bradyrhizobium species work synergistically with other soil bacteria? Yes, synergistic effects are well-documented: Phosphate-solubilizing bacteria (PSB): Co-inoculation with PSB (e.g., Bacillus megaterium) enhances phosphorus availability, improving B. elkanii nodule formation and nitrogen fixation Azospirillum species: Co-inoculation of B. elkanii with Azospirillum brasilense produces superior soybean growth through complementary IAA production; IAA stimulates root growth, improving rhizobial infection Bacillus subtilis: Co-inoculation in saline-alkali soils increased soybean yield by 18% compared to B. elkanii alone Biofilm formation: In consortia, rhizobia establish biofilms on root surfaces, enhancing competition with native rhizobia and pathogenic microbes What is the optimal soybean genotype for B. elkanii nodulation? Optimal genotypes depend on strain compatibility with soybean Rj genes: Best compatibility: Non-Rj genotypes and Rj4-gene carriers (with compatible B. elkanii strains, but not USDA61) Poor compatibility: Rj3-genotype cultivars generally incompatible with B. elkanii Type B strains Strain-specific: B. elkanii strains vary in effectiveness with different cultivars USDA76, SEMIA 587, SEMIA 5019: Good nodulation on most soybean genotypes USDA61: Excellent on soybean but incompatible with Rj4 genotypes Elite strains (e.g., ESA 123): Superior performance in drylands Recommendation: For maximum nitrogen fixation, select cultivars without restrictive Rj genes and pair with adapted strain Agricultural Applications and Management Which crops benefit most from Bradyrhizobium elkanii application? All legume crops benefit, but effectiveness varies: Highest benefit: Soybean, peanut, mung bean (90–300 kg N/ha fixation) Good benefit: Black-eyed pea, groundnut, yard-long bean (100–200 kg N/ha) Situational benefit: Native legumes, forage legumes (highly variable) No benefit: Non-legume crops (though limited growth promotion observed with some grasses) Factors maximizing benefit: Presence of native rhizobial population <10⁴ CFU/g soil Absence of antagonistic soil microbes Compatible soybean genotype (for soybean) Adequate soil pH (5.5–7.5) Highest ROI crops: Soybean in virgin soils; peanut in semi-arid regions with drought-adapted strains How quickly can farmers expect to see results from Bradyrhizobium elkanii inoculation? Timeline: 1–2 weeks post-inoculation: Infection thread formation; root colonization progresses 2–4 weeks: Visible nodule appearance; initiation of nitrogen fixation 4–8 weeks: Peak nodulation and nitrogen fixation rates established 8–16 weeks (R1–R5 stages in soybean): Cumulative nitrogen benefit becomes apparent in plant biomass Harvest: Final yield difference becomes quantifiable Field observations: Early-inoculated plants show accelerated growth compared to uninoculated controls Root development superior within 3–4 weeks Leaf color and vigor improvements evident by 6–8 weeks Yield increase: 5–60% depending on initial soil population and environmental conditions Maximum benefit: Observed at crop maturity; early-season nodulation establishes sustained nitrogen supply for pod fill and grain development Is Bradyrhizobium elkanii compatible with other agricultural inputs? Compatibility Summary: ✓ Bio-pesticides: Compatible (exclude broad-spectrum fungicides) ✓ Bio-fertilizers & PSB: Highly compatible; synergistic effects ✓ Plant hormones (IAA, GA): Compatible; enhanced effects ✓ Herbicides: Most compatible; avoid antimicrobial formulations ✗ Chemical fertilizers: High nitrogen rates inhibit nodulation ✗ Broad-spectrum fungicides: Lethal to B. elkanii; use selective or post-inoculation application ✗ Chemical nematicides: Many reduce viability Recommendation: Apply B. elkanii as early as possible (seed or pre-plant soil); avoid fungicides during first 4–6 weeks post-inoculation. Nitrogen fertilizers should be minimal (<50 kg N/ha) to avoid suppression of nitrogen fixation. Environmental Impact and Sustainability Does Bradyrhizobium elkanii have any environmental risks? Safety Profile: Naturally occurring soil bacterium; non-pathogenic to plants and animals No environmental accumulation; subject to normal soil microbial turnover Approved for organic farming systems (non-GMO) Reduces synthetic fertilizer use, thereby lowering greenhouse gas emissions Environmental Benefits: Replaces ~100–300 kg N/ha of synthetic fertilizer per crop season Synthetic fertilizer production accounts for ~2% of global energy use; B. elkanii reduces this footprint Decreases soil contamination risk from excess nitrate leaching Improves soil carbon sequestration through enhanced root exudation and organic matter Potential concerns (minimal): If non-competitive strains displace native rhizobia (rare; native populations typically recover) Nodule senescence releases carbon; however, net soil carbon often increases due to residual legume biomass Overall: B. elkanii inoculation is environmentally sound and beneficial to soil ecosystems How does Bradyrhizobium elkanii contribute to sustainable farming? Sustainability Contributions: Nitrogen cycle restoration: Reduces dependence on Haber-Bosch synthetic nitrogen Soil health: Improves biological activity, organic matter, and aggregate stability Crop rotation benefits: Legume crops (with B. elkanii) replenish nitrogen for subsequent cereal crops; reduces fertilizer for following season by 30–50% Carbon footprint reduction: Avoids emissions from fertilizer production (~0.5 kg CO₂ per kg N eliminated) Resilience to climate variability: Nitrogen fixation continues under drought (strain-dependent) better than relying on soil nitrogen pools Economic sustainability: Inoculant cost (~$2–5 per hectare) << synthetic nitrogen fertilizer cost (~$15–40 per hectare) Broader implications: Integration of B. elkanii inoculation into farming systems supports UN Sustainable Development Goal 12 (Responsible Consumption and Production) and Goal 13 (Climate Action) Can Bradyrhizobium elkanii help with climate change mitigation? Direct contributions: Reduced N₂O emissions: Elite strains carrying N₂O reductase (nos genes) reduce soil N₂O emissions by ~70% compared to standard strains Fertilizer reduction: Each kilogram of synthetic nitrogen avoided saves ~5 kg CO₂ equivalent from production and transport Soil carbon sequestration: Enhanced root exudation and legume residue decomposition increases soil carbon stocks Example calculation: Soybean field (50 ha) with B. elkanii inoculation Replaces 100 kg N/ha with biological fixation Avoids: 5,000 kg CO₂ equivalent (from fertilizer production), 100 kg N₂O equivalent (20 kg CO₂ equivalent), 250 kg CO₂ (from transport/application) Total mitigation: ~5,370 kg CO₂ equivalent per season Product Selection and Application Strategies How should Bradyrhizobium elkanii products be stored? Storage Conditions: Temperature: 4–15°C (cool, dry storage) Light: Darkness (UV light reduces viability by ~50% per week) Humidity: Sealed containers; humidity <70% Duration: Up to 1 year from manufacturing date Storage best practices: Keep in original sealed containers Store in dedicated cool storage (not with agrochemicals or fertilizers) Avoid direct sunlight, heat exposure Do not refrigerate below 4°C (cold stress reduces viability) Check for discoloration, foul odor, or contamination before use Discard products exceeding shelf life or showing signs of degradation Pre-application checks: Verify CFU concentration (should be ≥10⁸ CFU/g) Confirm expiration date Check for clumping or separation (sign of degradation) What is the optimal application timing for Bradyrhizobium elkanii? Timing Strategy: Best: Seed treatment 3–14 days before sowing (allows infection thread formation before water stress from germination) Good: At-planting seed treatment (simultaneous with sowing) Acceptable: Soil application 2–3 weeks before sowing (establishes soil population) Last resort: Early V2–V4 application (later than ideal but still effective) Seasonal considerations: Spring planting: Warmer soils favor infection; apply when soil temperature ≥15°C Monsoon crops: Ensure good soil drainage; waterlogged soils reduce nodulation Dry seasons: Apply post-irrigation or pre-monsoon for optimal soil moisture Sequential plantings: If crop residue is retained (no-till), residual soil population often supports second-year crops; re-inoculation beneficial only if populations fall below 10⁴ CFU/g soil Can organic farmers use Bradyrhizobium elkanii? Organic Certification Status: Yes, fully approved for certified organic production Bradyrhizobium elkanii is a naturally occurring, non-GMO soil bacterium Meets IFOAM (International Federation of Organic Agriculture Movements) standards Complies with organic certification requirements (USDA National Organic Program, EU Organic Regulation, others) Organic system benefits: Eliminates synthetic nitrogen fertilizer requirement Supports crop rotation strategies Improves soil biological diversity Aligns with organic philosophy of biological nutrient cycling Recommendations for organic farmers: Use seed treatments rather than synthetic fungicide combinations Apply biological inoculants early (seed or pre-plant) Avoid synthetic fungicides during critical nodulation period (first 4–6 weeks) Incorporate into comprehensive organic management (crop rotation, adequate organic matter, proper pH) Connecting B. elkanii and P. azotofixans While Bradyrhizobium elkanii and Paenibacillus azotofixans represent distinct nitrogen-fixing strategies, both contribute to agricultural sustainability: Characteristic B. elkanii P. azotofixans Nitrogen fixation strategy Symbiotic (nodulation) Free-living soil Host range Legumes (highly specific) Broad host range (all crops) Nitrogen contribution 100–300 kg N/ha/season 20–50 kg N/ha/season Nodule formation Yes; essential No PGPR functions Limited (nodulation-focused) Multiple (IAA, GA, biocontrol) Best use Legume crops Non-legumes and supplementary legume inoculation Interaction Can compete for nodule occupancy Complementary; enhances B. elkanii effectiveness via IAA production Integrated Approach: In diversified farming systems, B. elkanii inoculant for legume crops followed by P. azotofixans for non-legume crops creates a comprehensive biological nitrogen management strategy. Conclusion Bradyrhizobium elkanii represents a cornerstone microorganism for sustainable legume production. Its sophisticated molecular mechanisms for host recognition, infection, and nitrogen fixation, combined with practical agricultural benefits, make it indispensable for modern sustainable agriculture. With proper strain selection, timing, and integration with complementary practices, B. elkanii inoculation can significantly improve crop yields, reduce fertilizer dependency, and enhance soil health across diverse agroecosystems. Sustainability Advantage Content coming soon! Related Products Acetobacter xylinum Azospirillum brasilense Azospirillum lipoferum Azospirillum spp. Azotobacter vinelandii Beijerinckia indica Bradyrhizobium japonicum Gluconacetobacter diazotrophicus More Products Resources Read all

Trichoderma harzianum is a beneficial soil fungus widely used as a biological control agent and plant growth promoter in modern agriculture. It suppresses key soil-borne pathogens and certain nematodes through mycoparasitism, antibiosis, and competitive exclusion in the rhizosphere, forming a protective barrier around roots and reducing disease pressure. Beyond disease management, T. harzianum enhances seed germination, root development, and overall plant vigor while activating the plant’s own defense pathways and improving tolerance to abiotic stress. It is a core species for sustainable agriculture and integrated pest management programs. < Microbial Species Trichoderma harzianum Trichoderma harzianum is a beneficial soil fungus widely used as a biological control agent and plant growth promoter in modern agriculture. It suppresses key soil-borne pathogens and certain nematodes through mycoparasitism, antibiosis, and competitive exclusion in the rhizosphere, forming a protective barrier around roots and reducing disease pressure. Beyond disease management, T. harzianum enhances seed germination, root development, and overall plant vigor while activating the plant’s own defense pathways and improving tolerance to abiotic stress. It is a core species for sustainable agriculture and integrated pest management programs. Buy this species Strength 1 x 10⁸ CFU per gram / 1 x 10⁹ CFU per gram / 1 x 10¹⁰ CFU per gram Product Enquiry Download Brochure Benefits Biocontrol Agent Trichoderma harzianum is a well-established biological control fungus used to help manage soil-borne fungal diseases. It acts through multiple mechanisms, including rapid root-zone colonization, competition with pathogens for nutrients and space, production of antifungal enzymes and secondary metabolites, and direct antagonism against harmful fungi. These combined actions help reduce disease pressure and support more sustainable crop protection strategies. Strong Rhizosphere Adaptability As a highly competitive rhizosphere fungus, T. harzianum can establish itself around plant roots and remain active under a wide range of soil and environmental conditions. Its strong colonization ability supports a more resilient root-zone microbiome and contributes to improved soil biological activity. Plant Growth Promotion Beyond disease suppression, T. harzianum supports plant growth by improving root development, nutrient uptake, and overall plant vigor. Its interaction with the root system can help crops establish stronger root architecture, which improves access to water and nutrients during early and active growth stages. Induced Systemic Resistance T. harzianum can help activate the plant’s natural defense responses. By priming induced systemic resistance, it prepares plants to respond more effectively to pathogen attack, supporting healthier crops and improved resilience against a wide range of biotic stresses. Dosage & Application Additional Info Scientific References Mode of Action Sustainability Advantage FAQ Scientific References Recent Research Studies Biocontrol Efficacy Studies Overexpression in Trichoderma harzianum T4* (2024) Published in Archives of Microbiology Study demonstrated enhanced spore production and antagonistic activity against phytopathogenic fungi Reference: Archives of Microbiology, DOI: 10.1007/s00203-024-04091-4 Trichoderma harzianum Effects on Cucumber Physiology (2023) Published in Scientific Reports, Nature Showed 50.19% yield increase in cucumber Enhanced physiological and biochemical traits in cucumber seedlings Reference: Nature Scientific Reports, DOI: 10.1038/s41598-023-44296-z Molecular Mechanisms of Plant Growth Promotion (2023) Comprehensive review published in Frontiers in Microbiology Detailed analysis of competitive exclusion, antibiosis, and induced resistance mechanisms Reference: Frontiers in Microbiology, 10.3389/fmicb.2023.1160551 Application and Effectiveness Studies Optimization of Trichoderma harzianum for Nematode Control (2024) Published in Nature Scientific Reports Combined with chitosan, reduced root-knot nematode reproduction factor by 94% Reference: Nature Scientific Reports, DOI: 10.1038/s41598-024-68365-z Trichoderma harzianum in Organic Fertilizer Systems (2023) Published in Biodiversitas Journal 400 kg/ha application suppressed Fusarium wilt in shallots 55.7% production increase compared to NPK fertilizer alone Reference: Biodiversitas 24: 2426-2433 Growth Promotion in Radish Microgreens (2024) Demonstrated 19.75% yield increase and improved quality parameters Enhanced conversion efficiency of seed mass to fresh mass Reference: Agrineco Journal, 2024 Safety and Toxicology Studies EPA Safety Assessment of Trichoderma harzianum Strain T-39 (2000) Comprehensive toxicology study by US Environmental Protection Agency Classified as Toxicity Category III-IV for various exposure routes Non-pathogenic and non-infectious to mammals at tested doses Reference: EPA Registration Document 119200 Laboratory Animal Toxicity Study (2023) Published study examining harmful effects in laboratory animals Identified dose-dependent pathological effects in liver, kidney, and lungs Recommended cautious use despite natural origin Reference: PMC Article PMC10758010 Molecular and Biochemical Studies Recombinant Mutanase from Trichoderma harzianum (2025) Latest research on enzyme properties and biofilm destruction capability Published in Applied and Environmental Microbiology Reference: ASM Journals, DOI: 10.1128/aem.00226-24 Biotechnological Development and Formulations (2023) Comprehensive review of commercial applications and mechanisms Analysis of mycoparasitism, antibiosis, and competition mechanisms Reference: PMC Article PMC10439859 Mode of Action Primary Mechanisms of Biocontrol 1. Mycoparasitism Trichoderma harzianum exhibits direct parasitic activity against plant pathogenic fungi through: Hyphal coiling and penetration : Forms coils around pathogen hyphae and penetrates cell walls Enzyme secretion : Produces chitinases, β-1,3-glucanases, and proteases that degrade pathogen cell walls Physical invasion : Directly invades pathogen structures, leading to their destruction 2. Antibiosis The fungus produces various secondary metabolites with antimicrobial properties: Peptaibols : Linear peptides with antifungal activity Polyketides : Compounds that inhibit pathogen growth Volatile organic compounds : Gases that suppress pathogen development Antibiotics : Various metabolites that directly inhibit pathogen multiplication 3. Competition for Resources T. harzianum outcompetes pathogens through: Rapid colonization : Fast growth rate (2.0-4.2 times faster than many pathogens like Botrytis cinerea) Nutrient competition : Superior ability to acquire carbon, nitrogen, and mineral nutrients Space occupation : Physical exclusion of pathogens from infection sites Iron sequestration : Production of siderophores that chelate iron, making it unavailable to pathogens 4. Induced Systemic Resistance (ISR) T. harzianum triggers plant defense mechanisms: Elicitor production : Releases compounds that activate plant immunity Defense enzyme activation : Increases activities of phenylalanine ammonia lyase (PAL), polyphenol oxidase (PPO), and peroxidase (POD) Systemic acquired resistance : Enhances plant-wide defense responses Hormone modulation : Influences plant hormonal balance to improve stress tolerance Plant Growth Promotion Mechanisms Root Development Enhancement Mycorrhizal-like associations : Forms beneficial relationships similar to mycorrhizal fungi Root hair proliferation : Increases surface area for nutrient absorption Lateral root formation : Promotes branching for expanded root system Root barrier formation : Creates protective layer around roots Nutrient Solubilization Phosphorus mobilization : Solubilizes inorganic phosphates making them plant-available Micronutrient availability : Enhances uptake of iron, zinc, and other trace elements Organic matter decomposition : Breaks down complex organic compounds pH optimization : Modifies rhizosphere pH for better nutrient availability Stress Tolerance Improvement Antioxidant enzyme production : Reduces reactive oxygen species (ROS) damage Osmotic adjustment : Helps plants cope with water stress Heavy metal tolerance : Accumulates toxic metals, reducing plant stress Temperature resilience : Enhances tolerance to extreme temperatures Additional Info Target pests: Root knot nematode, Fusarium, Phytophthora Recommended Crops: Cereals, Millets, Pulses, Oilseeds, Fibre Crops, Sugar Crops, Forage Crops, Plantation crops, Vegetables, Fruits, Spices, Flowers, Medicinal crops, Aromatic Crops, Orchards, and Ornamentals. Compatibility: Compatible with Bio Pesticides, Bio Fertilizers, and Plant growth hormones but not with chemical fertilizers and chemical pesticides. Shelf Life: Stable within 1 year from the date of manufacturing. Packing: We offer tailor-made packaging as per customers' requirements. Dosage & Application Wettable Powder: 2 x 10⁶ CFU per gram Other Uses: Can also be used as nematicides; can be used as bio seed care Seed Dressing: mix 5g Trichoderma Harzianum with 5g crude sugar in sufficient water to make a slurry and coat seeds and dry in shade and sow / broadcast / dibble in the field. Do not store treated / coated seeds more than 24 hrs. Foliar Application: 1 Acre dose: 3-5 kg, 1 Ha dose: 7.5 - 12.5 Kg Soil Application (Soil drench or Drip irrigation): 1 Acre dose: 3-5 kg, 1 Ha dose: 7.5 - 12.5 Kg Soil Application (Soil drench or Drip irrigation) for Long duration crops / Orchards / Perennials: 1 Acre dose: 3-5 kg, 1 Ha dose: 7.5 - 12.5 Kg, Apply 2 times in 1 Year. Before onset of monsoon and after monsoon. Seed Dressing: 1 Kg seed: 5g Trichoderma Harzianum + 5g crude sugar Foliar application for Long duration crops / Orchards / Perennials: 1 Acre dose: 1 Kg, 1 Ha dose: 2.5 Kg, Apply 2 times in 1 Year. Before onset of monsoon and after monsoon. Soluble Powder: 1 x 10⁸ CFU per gram Foliar Application: 1 Acre dose: 1 Kg, 1 Ha dose: 2.5 Kg Soil Application (Soil drench or Drip irrigation): 1 Acre dose: 1 Kg, 1 Ha dose: 2.5 Kg Soil Application (Soil drench or Drip irrigation) for Long duration crops / Orchards / Perennials: 1 Acre dose: 1 Kg, 1 Ha dose: 2.5 Kg Seed Dressing: 1 Kg seed: 0.5g Trichoderma Harzianum + 5g crude sugar Foliar Application for Long duration crops / Orchards / Perennials: 1 Acre dose: 1 Kg, 1 Ha dose: 2.5 Kg, Apply 2 times in 1 Year. Before onset of monsoon and after monsoon. Seed Dressing Method: Mix Trichoderma Harzianum with crude sugar in sufficient water to make a slurry and coat seeds. Dry in shade and sow / broadcast / dibble in the field. Do not store treated / coated seeds for more than 24 hours. Soil Application Method: Mix Trichoderma Harzianum at recommended doses with compost and apply at early life stages of crop along with other biofertilizers. First application: At land preparation stage / sowing / planting. Second application: Three weeks after first application. Mix Trichoderma Harzianum at recommended doses in sufficient water and drench soil at early leaf stage / 2-4 leaf stage / early crop life cycle. Drip Irrigation: If there are insoluble particles, filter the solution and add to drip tank. For long duration crops / Perennial / Orchard crops: Dissolve Trichoderma Harzianum at recommended doses in sufficient water and apply as a drenching spray near root zone twice a year. It is recommended to have the first application before the onset of the main monsoon / rainfall / spring season and the second application after the main monsoon / rainfall / autumn / fall season. Foliar Application Method: Mix Trichoderma Harzianum at recommended doses in sufficient water and spray on soil during the off-season. Apply twice a year for long duration crops. It is recommended to have the first application before the onset of the main monsoon / rainfall / spring season and the second application after the main monsoon / rainfall / autumn / fall season. Note: Do not store Trichoderma Harzianum solution for more than 24 hours after mixing in water. FAQ What is Trichoderma harzianum used for? Trichoderma harzianum is a beneficial fungus used as a biological control agent and plant growth promoter in agriculture. Its primary applications include: Disease control : Manages soil-borne fungal diseases like Fusarium wilt, Rhizoctonia root rot, and Pythium damping-off Nematode management : Controls root-knot nematodes and other plant-parasitic nematodes Plant growth enhancement : Improves root development, nutrient uptake, and overall plant vigor Soil health improvement : Enhances soil microbial diversity and organic matter decomposition Is Trichoderma harzianum harmful to humans? According to EPA studies and scientific research: Generally safe : Classified as low toxicity (Category III-IV) by the US EPA Non-pathogenic : Not infectious or pathogenic to humans at normal exposure levels Precautions needed : Can cause mild irritation to eyes, skin, and respiratory system Inhalation concerns : May cause pulmonary irritation at high concentrations Recommendation : Use protective equipment (gloves, masks) during handling and application Is Trichoderma a fungus or bacteria? Trichoderma harzianum is definitively a fungus , specifically: Classification : Belongs to the Kingdom Fungi, Phylum Ascomycota Structure : Has typical fungal characteristics including hyphae, spores, and cell walls containing chitin Reproduction : Produces conidia (asexual spores) for propagation Growth pattern : Exhibits typical fungal mycelial growth on organic substrates How long does Trichoderma harzianum remain active in soil? The persistence depends on several factors: Environmental conditions : Survives longer in moist, organic-rich soils Temperature : Optimal activity at 20-30°C, reduced activity in extreme temperatures Formulation : Properly formulated products maintain viability for 6-12 months in soil Competition : May decrease over time due to competition with native microorganisms Reapplication : Generally recommended every 3-6 months for sustained benefits Application and Usage What is the best time to apply Trichoderma harzianum? Timing is crucial for maximum effectiveness: Soil preparation : 10-15 days before planting for optimal colonization Seed treatment : At sowing time for immediate protection Transplanting : During seedling transplantation for root protection Growing season : Early morning or evening to avoid UV degradation Soil moisture : When soil moisture is adequate (not waterlogged or dry) Can Trichoderma harzianum be mixed with chemical fungicides? Compatibility varies by fungicide: Compatible : Thiophanate-methyl, mancozeb, metalaxyl-M + mancozeb, pencycuron Incompatible : Carbendazim, thiram + tolclofos-methyl (highly toxic to Trichoderma) Timing separation : If using incompatible chemicals, apply 7-14 days apart Reduced efficacy : Chemical fungicides can significantly reduce Trichoderma populations Recommendation : Use in integrated programs with compatible products only What crops benefit most from Trichoderma harzianum application? Effective across a wide range of crops: High-value crops : Tomatoes, cucumbers, peppers, strawberries Field crops : Corn, soybeans, cotton, wheat Tree crops : Citrus, apples, grapes, nuts Ornamentals : Flowers, shrubs, nursery plants Specialty crops : Cannabis, herbs, microgreens Root vegetables : Carrots, potatoes, radishes Dosage and Application Methods What is the recommended dosage for different application methods? Seed Treatment Wettable Powder: 5g per kg of seeds + 5g crude sugar Soluble Powder: 0.5g per kg of seeds + 5g crude sugar Soil Application Wettable Powder: 3-5 kg per acre (7.5-12.5 kg per hectare) Soluble Powder: 1 kg per acre (2.5 kg per hectare) Foliar Application Wettable Powder: 3-5 kg per acre (initial), 1 kg per acre (maintenance) Soluble Powder: 1 kg per acre (2.5 kg per hectare) How should Trichoderma harzianum be stored? Proper storage is essential for maintaining viability: Temperature : Store in cool, dry conditions (below 25°C) Moisture : Protect from humidity and direct moisture contact Light : Keep away from direct sunlight and UV exposure Containers : Use original packaging or airtight containers Shelf life : Typically 12-24 months when stored properly Avoid : Do not store with chemical pesticides or fertilizers Troubleshooting Why might Trichoderma harzianum not show expected results? Several factors can affect performance: Poor application timing : Applied during unfavorable conditions Chemical interference : Recent use of incompatible fungicides Environmental stress : Extreme temperatures, drought, or waterlogging Soil conditions : Very acidic (pH < 4.5) or alkaline (pH > 8.5) soils Storage issues : Product may have lost viability due to improper storage Pathogen resistance : Some pathogen strains may be less susceptible Application method : Incorrect dilution or application technique Sustainability Advantage Content coming soon! Related Products Ampelomyces quisqualis Bacillus subtilis Bacillus tequilensis Chaetomium cupreum Fusarium proliferatum Lactobacillus plantarum Pediococcus pentosaceus Pseudomonas spp. More Products Resources Read all