GS2 — Oryza sativa Indica Group

Summary

BGIOSGA014417 (GS2, also known as OiGRF6, OiGRF5, OiGRF3, GRF2, OiGRF2, GRF1, GS2, OiGRF1, GRF3, GRF6, GRF5) on chromosome 4 of indica rice encodes a growth-regulating factor (GRF) family protein containing QLQ and WRC domains, with transcription coactivator activity, ATP binding, and protein binding functions. It localizes to the nucleus and is associated with grain size, heading date, growth, and developmental processes including root meristem growth, seed development, cell division, and cell population proliferation. The gene is linked to responses to deep water, salt, cold, and gibberellin, as well as positive regulation of the cell cycle and DNA-dependent transcription. Associations extend to grain weight, grain filling period, seed weight, grain length, water use efficiency, leaf morphology, anther and pistil development, and tolerance to heat and cold stress. Studies of related genes in other species link the family to organ size, seed size, salt tolerance, and plant regeneration.