PAP3 (BJUB02G04210S) — Brassica juncea

Summary

BJUB02G04210S (BjPAP3, also known as BjPIF3) encodes a basic helix-loop-helix transcription factor of the PIF3-like family, annotated with transcription regulator activator activity, phytochrome binding, and nuclear import signal receptor activity. In Indian mustard, this gene is associated with positive regulation of phytochrome signaling, seed maturation, thermomorphogenesis, and gibberellin biosynthesis, as well as regulation of auxin biosynthesis and photosynthesis light reactions. It has been linked to numerous agronomic traits including grain yield, flower diameter, fruit set, leaf area, chlorophyll ratio, vegetative vigor, photoperiod sensitivity, and responses to light quality, submergence, and UV-A sensitivity. The gene product localizes to plastids, chloroplast nucleoids, nuclear speckles, and the cell wall. Studies of related genes in other species associate the family with shade avoidance, circadian clock regulation, drought stress response, and defense signaling.