Background: Bacteria communicate with each other via chemical signals to coordinate expression of specific genes in a cell density dependent fashion a phenomenon called quorum sensing and response. Pseudomonads are ubiquitous bacteria that are common inhabitants of rhizosphere; these stimulate plant growth by facilitating either uptake of nutrients from soil or producing certain plant growth promoting substances. Besides, these bacteria also prevent proliferation of phytopathogens and thereby support plant growth.
Challenges: The present study deals with the quorum sensing mechanism which influences the antifungal activity of Pseudomonas aeruginosa and Pseudomonas fluorescens strains against the Rhizoctonia solani. The antifungal activity of the Pseudomonas aeruginosa and its extract was tested. The plant growth promoting ability was then analyzed and compared. Seed germination assay was also performed for proving quorum sensing.
Conclusion: Quorum Sensing in Biocontrol and Plant Growth Promoting Properties of Pseudomonas sp. was evaluated and found to be satisfactory.