NHX1 — Capsicum annuum

Summary

T459_32910 (CaNHX1) encodes a sodium/hydrogen exchanger 2, a member of the NaH_exchanger and cation/H_exchanger_CPA1 families, with lithium:proton antiporter, potassium:proton antiporter, sodium:hydrogen exchanger, and sodium transporter activities. In pepper, it is associated with vacuolar membrane transport, sodium import, lithium export, cell pH regulation, potassium ion homeostasis, abscisic acid and nitric oxide anabolism, and response to superoxide. It localizes to the tonoplast, vacuolar membrane, endosome, and chloroplast envelope. The gene is associated with yield, photosynthetic rate, stomatal resistance, plant height, root development, and disease tolerance, as well as sodium uptake, iron concentration, phosphorus uptake, and responses to high temperature, UV-B light, and abiotic stress. Studies of related genes in other species connect the family to vacuolar pH regulation, potassium accumulation, sodium tolerance, heat and cold tolerance, seed germination, and biomass production.