Since PG12 was the most effective in solubilizing P from FePO4, spent media from PG12 was added to 0.2-strength HNS containing low P (1 mg L−1) and no Fe, with and without 0.2 g of FePO4 to grow tomato for 7 d. The root and shoot biomass in PG12 treatment were 2.3–4.0 fold (0.04–0.07 g per plant) higher than that in the control and PchA mutant ( Fig. 3A). The increased tomato biomass was probably associated with increased P and Fe uptake in the plant. The shoots and roots with PG12 treatment had 1.5–2.7 fold higher P concentration (7.46–11.6 mg g−1) than that in the control and 1.3–1.7 fold higher than that of the mutant PchA ( Fig. 3B). The Fe concentrations in tomato plant also increased 10-fold (10.8 mg kg−1) in the shoots and 2-fold (270 mg kg−1) in the roots with PG12 treatment compared to PchA mutant ( Fig. 3C).