NHX1 — Brassica juncea

Summary

BJUB02G28440S (BjNHX3, NHX1) encodes a member of the Na+/H+ exchanger family, specifically a cation/H+ exchanger of the CPA1 type, with potassium:proton antiporter activity, sodium transporter activity, and sodium:hydrogen exchanger activity. The protein localises to the vacuolar membrane and plasmalemma. It is associated with vacuolar membrane transport, sodium import, cell pH regulation, potassium ion membrane transport and homeostasis, photoprotection, chlorophyll fluorescence, detoxification, calcium signalling, and activation of the salinity response. The gene is linked to chlorophyll content, and traits such as microtubule organisation, auxin homeostasis, plant growth, root growth directionality, apical dominance, gravitropism, ion homeostasis, and potassium and low-potassium tolerance. Related genes in other species are associated with salt tolerance and soluble sugar accumulation.