NHX8 — Brassica napus

Summary

BnNHX8 (NHX8) on chromosome C05 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. It is associated with vacuolar membrane, tonoplast, chloroplast envelope, plasmalemma, cytoplasm, and nucleus localisation. The gene 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-mediated signalling. It is associated with yield, leaf relative water content, 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 salt stress tolerance, sodium efflux, and ion homeostasis.