HY3 — Nicotiana attenuata

Summary

A4A49_26664 (HY3/PHYC) in coyote tobacco (Nicotiana attenuata) encodes a protein with phytochrome A-E, GAF, PAS, and histidine kinase domains. The gene is associated with tetrapyrrole binding and detection of light, as well as regulation of response to red or far red light and positive regulation of the phytochrome signaling pathway. It has been connected to numerous agronomic traits including grain yield, panicle number, flower diameter, leaf area, plant dry weight, vegetative vigor, photoperiod sensitivity, far red and blue light sensitivity, chlorophyll ratio, and responses to copper, glyphosate, and submergence. Associations also include shoot regeneration, flowering time, drought and cold stress responses, disease resistance, defense responses, carbon assimilation, and nitrogen, potassium, and phosphorus utilization. Studies of related genes in other species link the family to fruit ripening, tuberization, senescence, and biotic stress resistance.