GS2 — Sorghum bicolor

Summary

SbGS2 (SORBI_3010G013500) on sorghum chromosome 10 encodes a growth-regulating factor (GRF) family protein with a WRC domain and transcription coactivator activity. It localises to the nucleus and binds ATP and proteins. The gene is associated with responses to deep water, gibberellin, and cold stress, as well as positive regulation of cell cycle, cell division, meristem and root meristem growth, adaxial/abaxial pattern specification, seed development, starch anabolism, and DNA-dependent transcription. SbGS2 has been linked to grain filling period, seed weight, grain weight, yield, water use efficiency, anthocyanin content, leaf and floral organ development traits, ovary and pistil morphology, anther morphology, plant cell size, root oxidative activity, and oxidative stress response. Studies of related genes in other species connect the family to grain size, heat and cold tolerance, organ size, seed size, plant regeneration, and iron uptake.