Combined effects of plant growth promoting rhizobacteria and fungi on mung bean (Vigna radiata L.)

In the present study, screened PGPR and Fungi were influence the growth of Mung bean (Vigna radiata) plant in the pot. Two rhizobacteria viz. Rhizobium sp., Pseudomonas putida and three fungi Aspergillus niger, Rhizopus sp. and Trichoderma viride were isolated and purified. The effect of inoculation of different strains of bacteria and fungus on growth responses of Vigna radiata under pot condition was enumerated. The result revealed that the single and dual inoculation of these microbial strains enhances the plant growth in terms of root and shoot length and dry-biomass. The maximum increase in root length (up to 86.57%), shoot length (up to 56.91%), root dry weight (up to 94.42%), and shoot dry weight (up to 56.09%) was observed in response to dual inoculation of Pseudomonas putida with Trichoderma viride compared to uninoculated control. INTRODUCTION: Plant growth promoting rhizobacteria (PGPR) are a group of bacteria that actively colonize plant roots and increase plant growth and yield 1, 2, 3 . The important traits of PGPRs include fixation of atmospheric nitrogen, solubilization of insoluble inorganic phosphates, production of plant hormones, siderophores, bacteriocins etc. These organisms also provide protection to plants against diseases by suppressing deleterious and pathogenic microorganisms 4 . The potential to use PGPR in integrated strategies to reduce Nitrogen and Phosphorus fertilizers offers an appealing research area for those scientists engaged in growth promotion studies in dependable of biological control.