GS2 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.7HG0641080, designated HvGS2 on barley chromosome 7H, encodes a growth-regulating factor (GRF) protein containing QLQ and WRC domains and annotated as a transcription coactivator with ATP and protein binding activities. The gene is associated with responses to deep water, salt, nitrate, and gibberellin, as well as photorespiration, chlorophyll fluorescence, leaf senescence, seed development, root meristem growth, cell division, and adaxial/abaxial pattern specification. It localises to the nucleus. HvGS2 is associated with grain weight, grain filling period, seed weight, water use efficiency, chlorophyll content, anthocyanin content, quantum yield, leaf and floral organ morphology, ovary and pistil development, and oxidative stress response. Studies of related genes in other species link the GRF family to leaf size, cell proliferation, chloroplast proliferation, stem cell maintenance, grain size, heat and cold tolerance, heading date, and panicle development.