Abstract
Phosphorus-solubilizing microorganisms (PSMicros) play vital roles in helping plants to resist phosphorus (P) deficiency in soils, while their activities may vary with site conditions. The present study investigated the microbial diversity and subsequently screened PSMicro strains from rhizosphere soils at five bamboo forests in subtropical China, among which four were developed in a same stand. The activities of the screened PSMicros were also assessed. The results showed great variation in microbial diversity among different forests. Concomitantly, a total of 52 PSMicro strains were isolated and identified to 10 bacterial genera and 4 fungal genera, with different forest rhizosphere soils containing different PSMicros and/or showing different abundances for a certain PSMicro genus, despite some PSMicros would not grow readily on plates. Different, and even the same microbial genera isolated across the five forests, varied significantly in the amount of P that they solubilized from the medium, which ranged from 18.5 to 581.33 mg L-1 . Among the isolated PSMicros, species of Bacillus, Kluyvera, Buttiauxella, Meyerozyma and Penicillium were preponderant to liberate P from organic and inorganic P pools. This will have implication...Continue Reading
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