GS2 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.7HG0662690, designated HvGS2 (also known as HvGRF6, HvGRF5, and other synonyms) on barley chromosome 7H, encodes a Growth-Regulating Factor (GRF) protein containing QLQ and WRC domains and functions as a transcription coactivator with ATP and protein binding activity. It is localized to the nucleus and associated with a wide range of developmental and physiological processes, including seed development, leaf senescence, root meristem growth, photorespiration, chlorophyll fluorescence, and responses to salt, nitrate, gibberellin, and deep water. The gene is linked to agronomically important traits such as grain weight, water use efficiency, chlorophyll content, anthocyanin content, and oxidative stress response. Studies of related genes in other species connect the family to grain size, heat and cold tolerance, organ size, and plant regeneration efficiency.