PMIT1 — Oryza sativa Japonica

Summary

Rice gene PMIT1 (NRAMP2) on chromosome 3 encodes a member of the NRAMP family of metal ion transporters, with molecular functions including manganese, iron, and cadmium ion transmembrane transporter activity. The protein localises to the tonoplast, trans-Golgi network membrane, endosome membrane, and vacuole. In rice, the gene family is associated with metal accumulation and tolerance, particularly for cadmium, cobalt, and manganese, as well as with grain quality, yield, root development, and disease resistance. The gene is also associated with biological yield, leaf relative water content, chlorophyll content, plant height, and grain yield. Studies of related genes in other species connect the family to iron mobilisation, cadmium sensitivity, and photosystem II function.