HY3 — Solanum tuberosum

Summary

StHY3 (PGSC0003DMG400027211) on potato chromosome 5 encodes a phytochrome protein, a member of the phytochrome A-E family with tetrapyrrole binding activity. The gene is associated with regulation of response to red or far red light, detection of light, and positive regulation of the phytochrome signaling pathway. It is linked to photoperiod sensitivity, far red light sensitivity, blue light sensitivity, grain yield, subterranean shoot axis tuber size, flower diameter, panicle number, branch angle, leaf area, vegetative vigor, plant dry weight, and chlorophyll ratio. StHY3 is also associated with flowering under drought stress, long day regulated expression of florigens, drought escape via ABA-dependent pathway, and cold stress response, drought stress response, and heat stress tolerance. Related genes in other species link the family to tuberization, fruit ripening, carotenoid accumulation, and biotic stress resistance.