NHX8 — Triticum aestivum

Summary

TRAESCS7A02G397700 (TaNHX8, also known as TaSOS1-7A) on wheat chromosome 7A encodes a cation/H⁺ exchanger of the CPA1 family with lithium:proton antiporter, sodium:hydrogen exchanger and potassium:proton antiporter activities. The gene is associated with salt stress tolerance, sodium and lithium ion homeostasis, sodium efflux and transport, potassium acquisition, and root sodium toxicity. It has been linked to yield traits, plant height, leaf chlorophyll content, photosynthetic rate, stomatal resistance, drought tolerance, high temperature stress response, wheat stripe rust disease response, root development, and oxidative stress response. The product localises to the vacuolar membrane, tonoplast, plasmalemma and chloroplast envelope. Studies of related genes in other species link the family to salt tolerance, sodium exclusion, lithium tolerance, ion homeostasis and potassium uptake.