AUR3 — Oryza sativa Japonica

Summary

OsAUR3 (Os05G0143800) on rice chromosome 5 encodes a GH3 family protein with IAA amido synthetase, JA-amino synthetase, and adenylyltransferase activities, and is associated with AMP and amino acid binding. In rice, the gene has been linked to defense responses, abscisic acid and jasmonic acid signaling, mycorrhizal symbiosis, seed and crown root development, root hair formation, dwarfism, drought tolerance, and broad-spectrum disease resistance, including to blast. It is also associated with cellular auxin homeostasis, jasmonic acid metabolism, camalexin biosynthesis, and regulation of defense responses to bacteria. Associations extend to traits such as grain yield, panicle number, tiller angle, photoperiod sensitivity, light responses (red, far-red, blue, UV-B), root architecture, and plant morphology. The gene product localizes to the cytosol, chloroplast envelope, vacuole, plasmodesma, and nuclear ubiquitin ligase complexes.