Main PGP activities of rhizobacteria include production of IAA which is a phytohormone regulating plant growth, siderophores which solubilize iron and make it available to plants, chitinase which can lyse pathogenic fungal cells, antibiotics which can inhibit pathogens,nitrogen fixation, and phosphate solubilization leading to increase in availability of the limiting nutrient phosphorus (Babalola 2010).