NHX1 — Oryza sativa Indica Group

Summary

BGIOSGA018801 (OiNHX1) on chromosome 5 of Indica rice encodes a sodium:hydrogen exchanger with potassium:proton antiporter and sodium transporter activities, belonging to the cation/H+ exchanger CPA1 family. The protein localizes to the vacuolar membrane, vacuole, plastid, mitochondria, cytosol, and plasmalemma. OiNHX1 is associated with salt and drought tolerance, seedling and grain traits, yield, shoot and root development, lateral root formation, pollen and vascular bundle characteristics, stomatal regulation, and abiotic stress responses. It is linked to biological processes including vacuolar membrane transport, sodium and potassium ion transport, cell pH regulation, regulation of stomatal closure, leaf development, and activation of salinity response. Associations also include proline content, photosynthetic rate, plant growth, stomatal conductance, root growth, auxin and potassium homeostasis, and vacuolar ion homeostasis.