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Zinc (Zn) deficiency is a widespread micro-nutritional disorder in humans. The present research aimed at investigating the enzymatic and physiological roles of zinc solubilizing bacteria (ZnSB) to solubilize the insoluble form of Zn and in increasing Zn content in chickpea. Bacterial strains (50) were isolated from chickpea rhizosphere and were screened in vitro for their Zn solubilizing efficiency by culturing on Tris-minimal agar medium supplemented with insoluble Zn compounds (ZnO and ZnCO₃). Initially, six potential ZnSB (ZnSB7, Paenibacillus polymyxa; ZnSB11, Ochrobactrum intermedium; ZnSB13, Bacillus cereus; ZnSB21, Streptomyces; ZnSB24, Stenotrophomonas maltophilia; and ZnSB25, Arthrobacter globiformi) were selected based on Zn solubilization halo, Zn solubilization efficiency, and quantitative solubilized Zn. These strains were further assayed for higher phosphate solubilizing index …