NHX1 — Cucumis sativus

Summary

CsNHX1 (CSA_3G760510) encodes a cation/H+ exchanger of the CPA1 family, with lithium:proton antiporter, potassium:proton antiporter, sodium:hydrogen exchanger and sodium transporter activities. It is associated with vacuolar membrane transport, sodium import and export, potassium ion homeostasis, cell pH regulation, brassinosteroid and nitric oxide anabolism, and response to superoxide. The gene is linked to numerous traits including sodium exclusion and uptake, yield, plant height, root length and volume, chlorophyll content, photosynthetic rate, stomatal resistance and conductance, drought tolerance, disease tolerance, and responses to high temperature, UV-B, abscisic acid and jasmonic acid. It localises to the tonoplast, vacuole, endosome, plastid and chloroplast envelope. Related genes in other species are associated with vacuolar pH homeostasis, potassium accumulation, heat and cold tolerance, seed germination and biomass production.