GS2 — Sorghum bicolor

Summary

SbGS2 (SORBI_3004G269900) on sorghum chromosome 4 encodes a growth-regulating factor (GRF) protein with a QLQ and WRC domain, acting as a transcription coactivator with ATP and protein binding activity. It localises to the nucleus and is associated with response to deep water, gibberellin and cold stress, positive regulation of cell cycle, meristem and root meristem growth, seed development, starch anabolism, cell division, and adaxial/abaxial pattern specification. The gene is linked to grain filling period, seed weight, water use efficiency, anthocyanin content, leaf and floral organ development traits, and oxidative stress response. Related genes in other species are associated with grain size, heat and cold tolerance, organ size, seed shattering, heading date, and plant regeneration efficiency.