ARF — Oryza sativa Japonica

Summary

OS05G0489600 (ARF) on rice chromosome 5 encodes a small GTPase of the Arf1-5-like family, with GTPase activity, GTP binding, phospholipase activator activity and G protein activity. The gene is associated with auxin transport and anabolism, flower and leaf formation, anther development, lateral root development, aerenchyma formation, geotropism, cellular senescence, oxygen transport, sexual reproduction, and intracellular protein transport. It localises to the Golgi complex and cytoplasm. Associations with agronomic traits include tiller angle, tiller number, plant height, grain number, grain size, grain weight, grain yield, seed size, starch content, root number and length, IAA content, auxin sensitivity, and tolerance to salinity, cold and drought. Studies of related genes in other species link the family to spike type, spikelet number, grain shape, anthesis time, chlorophyll content, protein content, callus induction, auxin content and stripe rust response.