Screening the Rhizobium from Cajanus cajanfor Plant Growth Promoting Factors

Plant growth promoting rhizobacteria (PGPR) found in the rhizosphere in association with roots are beneficial bacteria which can heighten the growth of plant directly or indirectly. In the present study root nodules were collected from Cajanus cajan cultivated field, Karimganj of Barak Valley Region, Assam (India). A total of five (5) bacterial strains were isolated and they were further subjected to biochemical characterization and screened for plant growth promoting traits. The strain KRN5 showed high IAA production and KRN1 showed the highest solubilization of phosphate among others. KRN1 and KRN5 also showed tolerance to salt at 10 % NaCl concentration, which may be effective for soil with high salinity. The IAA production and phosphate solubization showed by these isolates make them suitable for further suitable pot trials.