NHX8 — Brassica oleracea

Summary

BoNHX8 (also known as SOS1) on cabbage chromosome 5 encodes a cation/H⁺ exchanger of the CPA1 family with lithium:proton and potassium:proton antiporter activity, as well as protein kinase and NAD ADP-ribosyltransferase activities. The gene is associated with vacuolar membrane and tonoplast localisation, and is linked to lithium export, sodium import, cell pH regulation, vacuolar membrane transport, and activation of salinity response. It is also associated with lateral root morphogenesis, glucosinolate and nitric oxide anabolism, secondary metabolism, and responses to superoxide, ozone, hydrogen peroxide, and ethylene-mediated signalling. Associations include yield, photosynthetic rate, chlorophyll content, plant height, root development, drought tolerance, disease tolerance, and salt stress tolerance. Related genes in other species link the family to sodium ion homeostasis, salinity tolerance, and heat tolerance.