NHX1 — triticum aestivum

Summary

TRAESCS7A02G242300 (symbol NHX1) on bread wheat chromosome 7A encodes a sodium/hydrogen exchanger, a member of the CPA1 cation/H+ exchanger family with potassium:proton antiporter activity. The protein localises to the vacuolar membrane, endosome and plasmalemma. NHX1 is associated with vacuolar membrane transport, sodium import, potassium ion transport, cell pH regulation, proton transmembrane transport, calcium transport, transition metal transport, hydrogen sulfide anabolism, melatonin anabolism, C4 photosynthesis, response to karrikin and nitrate, vacuole organisation, protein membrane targeting, and circadian rhythm and jasmonic acid signalling pathways. The gene is associated with leaf chlorophyll content, photosynthetic rate, stomatal resistance, grain weight, grain yield, plant height, and salinity and drought tolerance. Studies of related family members in other species link the NHX family to salt response, water use efficiency, sugar content and quantum yield.