DREB2 — Brassica juncea

Summary

BjDREB2 (BJUB08G58790S) on Indian mustard chromosome B08 encodes a protein with an AP2/ERF domain, sequence-specific DNA binding, and transcription coactivator activity. It is associated with the upregulation of chlorophyll breakdown, wax anabolism, defense responses, and leaf senescence, as well as stomatal complex patterning, trichome branching, photoperiodic flowering, glucosinolate metabolism, and responses to superoxide, ozone, and nitric oxide. The gene is linked to numerous agronomic traits including yield, plant height, shoot dry weight, starch content, transpiration rate, stomatal resistance, lateral root length, root oxidative activity, water stress response, osmotic sensitivity, and jasmonic acid sensitivity. It localizes to the nucleus, cytoplasm, nucleolus, and RNA polymerase II, IV, V, and Mediator complexes. Studies of related genes in other species connect the family to dehydration, heat, salinity, and osmotic stress tolerance, as well as drought response and thermotolerance.