NHX8 — triticum aestivum

Summary

TRAESCS7B02G475500 (TaNHX8, also known as TaSOS1-7B) on wheat chromosome 7B encodes a cation/H⁺ exchanger of the CPA1 family with lithium:proton antiporter, sodium:hydrogen exchanger, and potassium:proton antiporter activities. It is associated with salt stress tolerance, sodium uptake, and lithium ion homeostasis, as well as responses to drought, high temperature, oxidative stress, and UV-B light. The gene has been linked to yield traits, plant height, leaf chlorophyll content, photosynthetic rate, stomatal resistance, root development, and disease tolerance. It localizes to the vacuolar membrane, tonoplast, plasmalemma, and chloroplast envelope, and is connected to processes including sodium and potassium transport, cell pH regulation, lateral root morphogenesis, and hydrogen sulfide, melatonin, and nitric oxide anabolism. Studies of related genes in other species link the family to sodium exclusion and high-salinity stress tolerance.