ERD4 — Brassica juncea

Summary

BJUB05G45220S (ERD4, BjOSCA1.6) on Indian mustard chromosome B05 encodes a calcium-activated cation channel, a member of the CSC1/OSCA1-like family with cytosolic, N-terminal and seven-transmembrane domains. The gene is associated with seed germination and response to thirst, and its product localises to the chloroplast membrane and plasmalemma. It has been linked to leaf number and drought tolerance. Related genes in other species connect the family to osmotic stress sensing and calcium signalling, and sequence similarity places BjOSCA1.6 within a broader group of plant OSCA channels implicated in environmental responses.