In this study we tested the ability of 7 ARB from the rhizosphere of P. vittata growing in As-rich soils in solubilizing P from insoluble minerals like FePO4 and phosphate rock [Ca10(PO4)6F2], and from organic P like phytate. These bacteria were selected because they were isolated from arsenic-rich soil with low Fe and P availability. The major objectives of this research were to assess the ability of siderophores and phytase produced by arsenic-resistant bacteria in: (1) solubilizing P from inorganic minerals like FePO4 and phosphate rock, and organic P like phytate, and (2) enhancing growth in tomato by increasing P and Fe uptake from FePO4 and phytate.