DCAR_029297 — Daucus carota subsp. sativus

Summary

DCAR_029297, also known as PAP3 and PIF3, encodes a PIF3-like basic helix-loop-helix transcription factor on carrot chromosome 9. The product possesses transcription regulator activator activity, phytochrome binding, and nuclear import signal receptor activity, and is associated with chromatin, the chloroplast nucleoid, and nuclear ubiquitin ligase complexes. This gene is associated with positive and negative regulation of phytochrome signaling, thermomorphogenesis, gibberellin biosynthesis, and photosynthesis light reactions. It is linked to numerous agronomic traits including carotenoid content, grain yield, fruit quality, root system morphology, flower diameter, seed protein content, total soluble sugar content, iron content, vegetative vigor, leaf area, photoperiod sensitivity, and responses to UV-A and far-red light, drought stress, and nematode damage. Studies of related genes in other species link the family to far-red light signaling and chloroplast division, fruit yield, ripening, and lycopene content.