NHX1 — Cucumis sativus

Summary

CSA_5G098980 (NHX1, also known as SOS1) in cucumber (Cucumis sativus) on chromosome 5 encodes a cation/H+ exchanger of the CPA1 family with sodium:hydrogen exchanger, lithium:proton antiporter, and potassium:proton antiporter activities. The gene is associated with sodium exclusion, vacuolar membrane transport, sodium import and export, lithium transport, cell pH regulation, polyamine metabolism, flower formation, and the ascorbate-glutathione cycle. It localizes to the tonoplast, vacuole, endosome, and chloroplast envelope. NHX1 is linked to numerous agronomic traits including yield, plant height, root length and volume, shoot and plant dry weight, chlorophyll content, photosynthetic rate, stomatal resistance, nitrogen and phosphorus uptake, iron concentration, nitrate content, and responses to high temperature, UV-B light, and jasmonic acid. Studies of related genes in other species connect the family to sodium and potassium accumulation, vacuolar pH homeostasis, heat and cold tolerance, seed germination, and biomass production.