Zinc transporter involved response to salt stress. May act through the regulation of zinc levels required to induce the unfolded protein response (UPR) pathway. Expressed in hypocotyls, cotyledons, leaves and anthers. By treatment with high concentrations of salt. No visible phenotype under normal growth condition, but hypersensitivity to elevated levels of salt. Belongs to the ZIP transporter (TC 2.A.5) family. ZupT subfamily.