Arsenic-hyperaccumulator Pteris Vittata Efficiently Solubilized Phosphate Rock to Sustain Plant Growth and As Uptake.

•Mechanism of insoluble P utilization by As-hyperaccumulator P. vittata was studied.•Phytic acid as the dominant root exudate in P. vittata was unique.•P. vittata efficiently acquired P from insoluble phosphate rock via phytic acid exudation.•Both arsenate and phosphate rock induced phytic acid exudation in P. vittata.