Plant growth-promoting rhizobacteria (PGPR) is a group of free living bacteria, which have ability to promote a growth and yield of crop plants. Soil P concentration is one of the most important limiting factors for soil fertility. As Phosphorus (P) is one of essential macro-minerals for the growth and development of plant. We screened phosphate solubilizing bacteria from rhizospheric soil of Helianthus annuusa and Arachis hypogaea plants and assessed their invitro plant growth promoting (PGPR) properties including Nitrogen fixation, Production of indole-3 acetic acid (IAA), Siderophores, Hydrogen cyanide (HCN) and Ammonia. We also investigated their ability to solubilize 0.1% insoluble zinc oxide and their growth on Bunt and Rovira agar medium.Therefore, PSB-Advanced solubilized phosphate with P-solubilizing index (PSI) is 2.1395 is an efficient to convert the insoluble P compounds to soluble form in the soil and available soluble P to plant, resulting in better plant growth.
PSB-Advanced is also showed other plant growth promoting activities such as production of Indole Acetic Acid, Zinc solubilization, Ammonia production and Nitrogen fixation. It also acts as a biocontrol against plant pathogens via production of hydrogen cyanide (HCN) and antifungal metabolites. Molecular identification revealed that the organism formulation in PSB-advance belong to Psedomonas Spp. PSB- Advance is useful as a cost effective bio fertilizer to promote agricultural productivity.