ABI5 — Brassica juncea

Summary

BJUA06G23540S (ABI5) on Indian mustard chromosome A06 encodes a bZIP transcription factor of the BZIP46-like family, with sequence-specific DNA binding and transcription cis-regulatory region binding activities. It localises to the nucleus and is associated with abscisic acid (ABA) signalling, including upregulation of ABA-mediated signalling and response to ABA. The gene is associated with seed germination, seedling development, pollen maturation, and responses to cold, thirst, and salinity, including activation of the salinity response. It is also linked to the salt tolerance trait SALTTL. Related genes in other species, such as ABF1 and ABF2, connect the family to seed dormancy, though this is not established for the Indian mustard gene itself.