SORBI_3001G394400 — Sorghum bicolor

Summary

SbHY3 (SORBI_3001G394400) on sorghum chromosome 1 encodes a phytochrome B photoreceptor, a member of the phytochrome family with domains including PAS, GAF, and histidine kinase. The gene product exhibits photoreceptor activity, tetrapyrrole binding, and is associated with detection of light, positive regulation of phytochrome signaling, and protein-bilin linkage. It is linked to photoperiod sensitivity, heading date, flowering under drought stress, and drought escape via an ABA-dependent pathway. Associations also include chlorophyll ratio, leaf area, plant dry weight, vegetative vigor, inflorescence length, root system morphology, and responses to far-red light, submergence, and glyphosate. The gene is associated with regulation of plant organ formation, chromatin organization, and upregulation of systemic acquired resistance. Studies of related genes in other species link the family to tillering, grain weight, heading time, and drought tolerance.