Analysis of dissolved P, Pb tolerance, and secreted metabolites of J101.

(A) The change in the dissolved P content and the pH value in the broth medium; (B) the OD values at 600 nm after culturing the PSB in fermentation liquid with Pb²⁺ concentrations of 0, 250, 500, 750, or 1000 mg·L-1 for 72 h; (C) the content of organic acid and IAA secreted by the PSB; (D) the phylogenetic tree of J101 based on the 16S rDNA gene sequences; and (E) the root systems of maize under different treatments.

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