ABI5 — Brassica juncea

Summary

BJUA05G08030S (BjABI5) on Indian mustard chromosome A05 encodes a bZIP transcription factor of the BZIP46-like family. The gene product is annotated with DNA-binding transcription activator activity, protein phosphatase regulator activity, and multiple other molecular functions including SUMO transferase and Ca2+/CaM-dependent kinase activity. BjABI5 is associated with regulation of abscisic acid anabolism, TOR signaling, nitrate assimilation, and salicylic acid metabolic processes. It is linked to numerous agronomic traits including seed set percent, endosperm storage protein content, inflorescence length, leaf elongation rate, whole plant size, and responses to salinity, nitrogen, phosphorus, cadmium, and aluminum. The gene is also connected to phenotypes such as altered ABA sensitivity, reduced seed germination, increased osmotic and salt stress tolerance, and resistance to pathogens including Ralstonia solanacearum and Botrytis cinerea. Studies of related genes in other species link the family to seed longevity, water use efficiency, and aluminum tolerance.