Isolation and characterization of effective and efficient plant growth-promoting rhizobacteria from rice rhizosphere of diverse paddy fields of Indian soil

摘要

Plant growth-promoting rhizobacteria, which are generally known as PGPR, are such kind of bacteria, which can support the growth of host plants by living in the rhizospheric region by variety of mechanisms. In present study, we had collected rice rhizospheric soil samples from different field of rice from Surat region of Gujarat, India. Total 22 PGPR bacterial isolates were isolated and screened for their various PGPR activities like siderophore production, phosphorus solubilisation, IAA production, and HCN production as well as for protease and chitinase activity. 10 isolates in case of siderophore production, 6 isolates in case of phosphorus solubilisation, 13 isolates in case of IAA production were found to be positive whereas 4 isolates shown positive HCN production. However, 10 and 9 isolates shown protease enzyme production and chitinase enzyme production. However, out of 22 isolates, 2 isolates were found to be most potent and gives majority of the PGPR activities. So, present study suggested that, isolated PGPR will be used to attain significant productivity and soil fertility in rice fields and can be used as biofertilizers.