At IndoGulf BioAg, we specialize in research and production of hundreds various bacterial species for wide range of applications.
Pseudomonas strains possess immense potential to aid modern agriculture in reducing chemical inputs into the soil and restoring a healthy soil microbiome.
Renowned for their versatility, several Pseudomonas strains offer significant advantages in promoting plant growth, combating pathogens, and enhancing soil health.
Auxin Production by Pseudomonas strains
Auxin, particularly indole-3-acetic acid (IAA), is crucial for regulating plant growth. Many Pseudomonas strains, such as Pseudomonas fluorescens, can produce IAA, stimulating root hair formation and lateral root development, which results in robust root systems.
The level of IAA produced can either stimulate or inhibit root growth, influenced by the balance between plant and bacterial synthesis. Strategic selection of strains ensures the optimisation of IAA production, enhancing root development without adverse effects.
Cytokinins and Gibberellins: Supporting Shoot Growth and Stress Tolerance
Pseudomonas species also produce other phytohormones like cytokinins and gibberellins, which are vital for shoot growth and stress resilience.
Cytokinins aid in cell division, chlorophyll synthesis, and delaying leaf senescence, particularly under water stress.
Gibberellins, such as those produced by Pseudomonas putida, enhance stem elongation and seed germination.
These properties facilitate faster plant growth and improved drought resistance, promoting resilience in harsh environments.
ACC Deaminase: Alleviating Plant Stress
Under stress, plants produce ethylene, which can restrict growth. Pseudomonas strains with ACC deaminase activity break down the ethylene precursor 1-aminocyclopropane-1-carboxylate (ACC), reducing ethylene levels and mitigating its growth-inhibitory effects. Studies demonstrate that plants inoculated with such strains show enhanced biomass and stress tolerance.
Phosphate Solubilization
Phosphorus, often present in insoluble forms in soil, is essential for plant nutrition. Pseudomonas strains that solubilize phosphate through the release of organic acids like gluconate and citrate improve phosphorus availability.
This enhancement in nutrient uptake supports stronger plant growth and yields, even in nutrient-poor soils.
Biocontrol: Natural Defense Against Pathogens
One remarkable attribute of Pseudomonas species is their ability to act as biocontrol agents. Strains like Pseudomonas fluorescens produce antifungal compounds such as 2,4-diacetylphloroglucinol (DAPG), which suppress pathogens like Rhizoctonia solani and Fusarium spp. This natural suppression reduces reliance on chemical pesticides, contributing to more sustainable agricultural practices.
Pseudomonas species are versatile bacteria with impactful roles in enzyme production, bioremediation, and sustainable agriculture. Acting as plant growth promoters and biocontrol agents, they offer eco-friendly alternatives to chemical inputs while supporting environmental management through soil remediation.
Explore how Pseudomonas species can benefit your projects. Contact us today to harness their potential in biotechnology and sustainable solutions.
References
Ahmad et al., 2022 – Effects of PGPR on drought stress mitigation(Plant_Growth_Promoting_…).
Singh et al., 2023 – Mechanisms of PGPR in sustainable agriculture(Enhancing_plant_growth_…).
Bano et al., 2022 – Phytostimulants for growth and stress tolerance(Phytostimulants_in_sust…).
Dukare et al., 2022 – Microbial contributions to plant health(Delineation_of_mechanis…).
Saeed et al., 2021 – Comprehensive review of rhizobacteria functions(Rhizosphere_Bacteria_in…).
Yang et al., – Rhizobacteria in abiotic stress resilience(Rhizosphere_bacteria_he…).
Auxins-Interkingdom Signaling Molecules Written By Aqsa Tariq and Ambreen Ahmed
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