NHX8 — Brassica napus

Summary

BnNHX8 (DARMORV10_A09P23700.1) on chromosome A09 of oilseed rape encodes a cation/H+ exchanger of the CPA1 family with lithium:proton and potassium:proton antiporter activity, as well as sodium:hydrogen exchanger, NAD ADP-ribosyltransferase, and protein kinase activities. The gene is associated with vacuolar membrane, tonoplast, plasmalemma, chloroplast envelope, cytoplasm, and nucleus localisation. It is linked to lithium export and transport, sodium import, potassium ion membrane transport, cell pH regulation, excretion, vacuolar membrane transport, nitric oxide anabolism, lateral root morphogenesis, seed germination, and responses to salt, ozone, hydrogen peroxide, superoxide, and ethylene signalling. Associations include leaf relative water content, sodium uptake, yield, photosynthetic rate, stomatal resistance, plant height, root development and thickness, drought tolerance, disease tolerance, salt response, and abscisic acid sensitivity. Related genes in other species link the family to lithium tolerance and sodium homeostasis.