BENEFITS AND DRAWBACKS OF PLANT GROWTH PROMOTING RHIZOBACTERIA ON PLANT GROWTH

Numerous species of soil bacteria grow in rhizosphere region of plant &enhance the plant yield as well as soil fertility collectively called as PGPR (plant growth promoting rhizobacteria).Plant growth promoting rhizobacteria are the bacterial breed of rhizosphere that can enhance plant growth by wide range of mechanism such phosphate solubilisation, nitrogen fixation etc.They are mostly naturally occurring bacteria which can easily colonize the plant root & increase the plant yield.According to all above characteristic of the PGPR, are made to exploit them commercially as bio-fertilizer.Various PGPR that act as biofertilizerare: Azotobacter, Potassium solubilizing bacteria, Nitrogen fixing bacteria, Phosphate solubilizing bacteria etc.Along with the positive effect of biofertilizer there is also some negative effect that affects the plant yield as well as soil fertility.The purpose of this review is to find out the beneficial & harmful effects of PGPR on plant growth.