GS2 — Sorghum bicolor

Summary

SbGS2 (SORBI_3004G317000) on sorghum chromosome 4 encodes a growth-regulating factor (GRF) protein containing QLQ and WRC domains and is annotated as a transcription coactivator with ATP and protein binding activity. It is associated with response to deep water, gibberellin, and cold stress, as well as positive regulation of cell cycle, meristem development, root meristem growth, cell division, seed development, starch anabolism, 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 grain yield. Studies of related genes in other species connect the family to grain size, heat and cold tolerance, organ size, and plant regeneration efficiency.