NHX1 — Oryza sativa Indica Group

Summary

BGIOSGA029567 (symbol NHX1, also known as OiSTA230 or STA230) on chromosome 9 of Indica rice encodes a cation/H⁺ exchanger transmembrane domain-containing protein with sodium:hydrogen exchanger and potassium:proton antiporter activity. The gene is associated with vacuolar membrane transport, sodium import, cell pH regulation, potassium ion membrane transport, and activation of salinity response. It localises to the vacuolar membrane, endosome, and plasmalemma. Associations include salinity tolerance, photosynthetic rate, and proline content. Studies of related genes in other species link the family to salt and drought tolerance, grain yield, leaf chlorophyll content, water use efficiency, stomatal resistance, root length, and sugar content.