Three Genes Define a Bacterial-Like Arsenic Tolerance Mechanism in the Arsenic Hyperaccumulating Fern Pteris vittata

？ Genes involved in arsenic tolerance in Pteris vittata were identified by RNA-seq ？ PvGAPC1, PvOCT4, and PvGSTF1 are essential for tolerance to arsenic ？ PvGAPC1 has high affinity for arsenate, and PvGSTF1 has arsenate reductase activity ？ A new bacterial-like mechanism for arsenic tolerance in this fern is propose