PHYE (AT4G18130) — Arabidopsis thaliana

Summary

AT4G18130, designated PHYE, encodes phytochrome E, a member of the phytochrome photoreceptor family that contains GAF, PAS, and histidine kinase domains and binds tetrapyrrole. In Arabidopsis thaliana, PHYE is associated with detection of light, regulation of response to red or far red light, positive regulation of the phytochrome signaling pathway, and termination of signal transduction. The gene is associated with traits including light quality response, far red light sensitivity, panicle number, plant dry weight, leaf area, drought recovery, and seedling cotyledon size. PHYE is also associated with cold stress response, drought stress response, freezing stress tolerance, biotic stress resistance, hypocotyl elongation, senescence, and anthocyanin synthesis. Studies of related genes in other species link the family to photoperiod detection, fruit ripening, tuberization, and grain yield.