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Bacillus megaterium is a well‑documented phosphate‑solubilizing bacterium (PSB) that mobilizes inorganic and organic P and can also enhance availability of several micronutrients under a wide range of soil conditions. Bacillus megaterium_petri_colony_solubilizing phosphorous_XL Mechanisms of phosphorus solubilization Organic acid production : B. megaterium secretes low‑molecular‑weight organic acids (e.g. gluconic, citric, lactic acids), which chelate cations (Ca, Fe, Al) and