AUR3 — Oryza sativa Japonica

Summary

OsAUR3 (Os07G0576100) on rice chromosome 7 encodes a GH3 family protein with IAA amido synthetase, JA-amino synthetase, adenylyltransferase, AMP-binding, and various photoreceptor and kinase activities. The gene is associated with defense, abscisic acid and jasmonic acid responses, mycorrhizal symbiosis, seed and crown root development, dwarfism, drought tolerance, and broad-spectrum disease resistance in rice. It is associated with cellular auxin homeostasis, jasmonic acid metabolism, camalexin biosynthesis, and regulation of defense responses to bacteria. Associations also include grain yield, tiller angle, panicle number, photoperiod-sensitive flowering, photosynthetic ability, and responses to red, far-red, blue, and UV-B light. The protein localizes to the nucleus, chloroplast envelope, vacuole, mitochondria, cytosol, and plasmodesmata. Studies of related genes in other species connect the GH3 family to auxin and salicylic acid homeostasis, pathogen defense, shade-induced hypocotyl elongation, and jasmonoyl-isoleucine biosynthesis.