A review on physiological and biochemical properties of plant growth promoting rhizobacteria (PGPR) and their effect on growth and development of maize (Zea mays L.)

Plant growth promoting rhizobacteria (PGPR) are a group of beneficial bacteria which inhabit various cereal crops including maize, colonize plant root interiors and migrate to different parts of plant.Under this study, four different endophytic bacterial strains namely Burkholderia cepacia (RRE3), Rhizobium leguminosarum bv. Phaseoli (RRE6), Pseudomonas aeruginosa (BHU3), Pseudomonas saponiphila (BHU8) were characterized for different physiological characters like tolerance to temperature, pH, salt and antibiotic resistance and biochemical parameters such as production of IAA, siderophore, and solubilization of phosphorus, zinc, potash. The combination of BHU8 with RRE3 proved to be most beneficial and efficient with regards to many of the growth parameters like shoot and root length, number of leaves, shoot and root fresh weight, shoot, root dry weight and chlorophyll content In this review we have tried to compile the previous research and findings in a precise way.