Isolation and Characterization of Phosphate Solubilizing Streptomyces sp. Endemic from Sugar Beet Fields of the Beni-Mellal Region in Morocco

In the course of our research, aimed at improving sugar beets phosphorus nutrition, we isolated and characterized Streptomyces sp. strains, endemic from beet fields Beni-Mellal region, which are able to use natural rock phosphate (RP) tricalcium (TCP) as sole sources. Ten isolates yielded a comparable biomass in presence these two insoluble sources, indicating that they were extract similar amount (P) latter for their own growth. Interestingly, five strains released soluble P large excess TCP culture broth whereas only BP, related bellus BYC, enissocaesilis, higher or RP than TCP, respectively. This indicated rate sources exceeded its consumption bacterial growth most solubilized more efficiently RP. Preliminary results suggested solubilization process efficient solubilizing strain, involves both acidification medium excretion siderophores. Actinomycete possessing such interesting abilities may constitute novel kind fertilizers beneficial plant nutrition environmentally friendly chemical current use.