NHX1 — Triticum aestivum

Summary

TRAESCS1A02G102300 (NHX1) on wheat chromosome 1A encodes a sodium:hydrogen exchanger with potassium:proton antiporter and sodium transporter activities, belonging to the NaH_exchanger and CPA1 cation/H_exchanger families. The gene is associated with drought tolerance in wheat and has been linked to salinity tolerance, cold tolerance, stripe rust resistance, grain yield, heading time, plant height, spikelet number, chlorophyll content, canopy temperature, net photosynthetic rate, stomatal resistance, proline content, and sugar content. It is associated with vacuolar membrane transport, sodium import, potassium ion membrane transport, cell pH regulation, proline metabolism, glutathione metabolism, hydrogen sulfide anabolism, melatonin anabolism, ethylene anabolism, and C4 photosynthesis. The product localizes to the vacuolar membrane, vacuole, plastid, mitochondria, cytosol, and plasmalemma. Studies of related genes in other species link the family to vacuolar pH homeostasis, potassium accumulation, ion homeostasis, and heat tolerance.