CSA_3G166340 — Cucumis sativus

Summary

CSA_3G166340 (HY3, also known as PHYB) on cucumber chromosome 3 encodes a phytochrome B photoreceptor, a member of the phytochrome A-E family with domains including GAF, PAS, and histidine kinase. The gene product is associated with tetrapyrrole binding and is linked to regulation of response to red or far red light, positive regulation of the phytochrome signaling pathway, and downregulation of chlorophyll anabolism. It is associated with numerous agronomic traits including days to maturity, grain yield, flower diameter, fruit set, branch angle, leaf area, plant dry weight, and vegetative vigor. Associations also include drought stress response, cold stress response, heat shock tolerance, and disease resistance, as well as flowering under drought stress, long day regulated expression of florigens, and inflorescence development. Studies of related genes in other species link the phytochrome B family to fruit ripening, tuberization, senescence, and thermotolerance.