Authors : Bobde Prajakta, Patil Suvarna, Rai Alok
Page Nos : 100-104
Description :
Plant growth promoting rhizobacteria (PGPR) are the rhizosphere bacteria that may be utilized to augment plant growth and suppress plant diseases (Shaikhul Islam et al.2016). In the search for efficient PGPR strains associated to the Soybean (Glycine max),a total of 95 isolates were obtained from the rhizospheric soil of soybean plants that were grown in the agricultural fields of Kamptee region. Among 95 isolates, 12 isolates were selected based on their in vitro antagonism towards phytopathogens. The effective antagonists were further screened for their plant growth promoting (PGP) activities viz., Phosphate solubilizing assay, Zinc solubilizing assay, Potassium solubilizing assay, Ammonia production, HCN production, Nitrogen fixation, Siderophore production, IAA production, and Chitinase assay. 11 isolates were positive for phosphate solubilization on Pikovskaya agar, 3 isolates were able to solubilize zinc, all 12 isolates were positive for ammonia, HCN and IAA production, 8 isolates were able to fix atmospheric nitrogen, of total twelve isolates, the only isolate unable to grow in chitin media was PB-5, rest all the eleven isolates were positive for chitinase assay, and 7 isolates found positive for siderophore production. Since these PGPR inoculants exhibited multiple positive PGP traits beneficial to the host plants, they may be applied in the development of new, safe, and effective bio-inoculants for improving plant growth and yield.
