AT4G16250 — Arabidopsis thaliana

Summary

AT4G16250 (PHYD) encodes phytochrome D, a member of the phytochrome photoreceptor family that contains GAF, PAS, and histidine kinase domains and binds tetrapyrrole. In Arabidopsis thaliana, PHYD is associated with phototransduction, regulation of response to red or far-red light, detection of light, and positive regulation of the phytochrome signaling pathway. The gene is associated with traits including panicle number, drought recovery, leaf area, plant dry weight, branch angle, inflorescence length, and far-red light sensitivity. PHYD is also linked to phenotypes such as shoot regeneration, chlorophyll accumulation, anthocyanin synthesis, cold and drought stress responses, disease resistance, and nitrogen utilization. Studies of related genes in other species connect the family to grain yield, drought tolerance, fruit ripening, tuberization, and photoperiod detection.