Essential transporter for growth and development under abiotic stress. Mediates shoot branching by promoting the outgrowth of lateral shoots. Required for salt tolerance via Na/K homeostasis, at least partly by regulating SKC1/OsHKT1;5. Necessary for hypodermal suberization of roots, which contributes to formation of the apoplastic barrier. Belongs to the ABC transporter superfamily. ABCG family. Eye pigment precursor importer (TC 3.A.1.204) subfamily.