PAP3 (BJUA09G03680S) — Brassica juncea

Summary

BJUA09G03680S (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 red/far-red light photoreceptor 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, photoperiod sensitivity, vegetative vigor, root morphology, and responses to light quality, submergence, UV-A, and glyphosate. Localization evidence connects the product to plastids, chloroplast nucleoids, nuclear speckles, and the cell wall. Studies of related genes in other species link the family to shade avoidance, circadian clock regulation, drought and salt stress responses, and defense signaling.