NHX1 — Triticum aestivum

Summary

TRAESCS2A02G121000, designated TaNHX1 on wheat chromosome 2A, encodes a sodium:hydrogen exchanger with potassium:proton antiporter activity and sodium transporter activity, belonging to the NaH_exchanger and CPA1 cation/H_exchanger families. The product is associated with vacuolar membrane transport, cell pH regulation, potassium ion import, regulation of stomatal closure, and C4 photosynthesis. TaNHX1 is associated with drought tolerance in wheat, as well as grain iron and zinc content, grain yield, harvest index, biomass yield, test weight, heading time, plant vigor, stand establishment, and leaf chlorophyll content. It is linked to plant growth, root growth, flower development, vacuolar pH, auxin and potassium homeostasis, and gravitropism. Studies of related genes in other species link the family to vacuolar pH homeostasis, potassium accumulation, heat tolerance, and salt and drought tolerance.