ARF — Sorghum bicolor

Summary

SORBI_3009G178600, designated SbARF, encodes a small GTPase of the Arf1-5-like family with GTPase activity, GTP binding, phospholipase activator activity and metal binding. It is associated with intracellular protein transport, vesicle transport, auxin signaling and response to auxin, signal transduction, NO storage and starch anabolism. The protein localises to the Golgi complex and cytoplasm. In sorghum, SbARF is linked to IAA content. Studies of related ADP-ribosylation factor genes in other species connect the family to auxin content and sensitivity, grain number, size and weight, tiller number and angle, plant height, spikelet number, root traits, chlorophyll content, anthesis time, seed germination, starch and protein content, and tolerance to salinity, cold and drought.