NHX1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.4HG0364050 (HvNHX1) on chromosome 4H 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 protein localises to the vacuolar membrane, vacuole, plastid, mitochondria, cytosol and plasmalemma. HvNHX1 is associated with salt stress response, salinity tolerance, water use efficiency, photosynthetic rate, chlorophyll content, plant height, relative growth rate, quantum yield and sugar content. It is linked to regulation of stomatal closure, leaf development, cell pH regulation, detoxification, cell redox homeostasis, vacuolar membrane transport, sodium import and potassium ion import. Related genes in other species link it to ion homeostasis, vacuolar pH regulation, potassium accumulation, cell expansion, heat tolerance and salt response.