ISSN: 0973-7510
E-ISSN: 2581-690X
Phosphate solubilizing bacteria (PSB) were isolated from the rhizosphere of different vegetable crops. A total of 18 isolates were selected and evaluated for P solubilization on solid as well as liquid medium. All the isolates showed large variations in P-solubilization, and they also produced indole-3-acetic acid (IAA) and phosphatase. On the basis of the 19 biochemical tests, these isolates were tentatively placed under three genera-Klebsiella, Pseudomonas and Enterobacter. All the selected PSB were able to establish well in the rhizosphere of wheat irrespective of the host. The shoot biomass was improved with seed bacterization by PSB. The plant growth promotion by PSB was not directly proportional with the solubilization of inorganic phosphate. The isolate that showed the maximum increase in shoot biomass did not possess the maximum P-solubilization ability; rather it produced the maximum IAA.
Phosphate solubilization, Plant-growth-promoting bacteria, Phosphatases, Rhizosphere, Seed bacterization
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