NHX8 — Triticum turgidum subsp. durum

Summary

TRITD3AV1G001360 (symbol NHX8, also known as SOS1) on durum wheat chromosome 3A encodes a cation/H+ exchanger transmembrane domain-containing protein with lithium:proton antiporter, sodium:hydrogen exchanger, and potassium:proton antiporter activities. The gene is associated with salt stress tolerance, lithium export, vacuolar membrane transport, cell pH regulation, and responses to superoxide, hydrogen peroxide, and ozone. It has been linked to yield traits, grain yield, plant height, photosynthetic rate, stomatal resistance, drought tolerance, disease tolerance, root development, and meristem identity. Localization evidence connects the product to the vacuolar membrane, tonoplast, plasmalemma, chloroplast envelope, cytoplasm, and nucleus. Studies of related genes in other species link the family to high-salinity stress tolerance, sodium exclusion, and ion homeostasis.