AGR — Oryza sativa Japonica

Summary

OsAGR (OS12G0133800) on rice chromosome 12 encodes a PIN1D auxin efflux carrier, a member of the PIN-like family of auxin transport proteins. The gene product exhibits auxin efflux transmembrane transporter activity, inositol-1,4-bisphosphate 1-phosphatase activity, and phosphatidylinositol phosphate binding. OsAGR is associated with plant height, tiller number, root system architecture, adventitious root emergence, and shoot architecture in rice. It is linked to reproductive development, inflorescence formation, and young panicle traits. The gene is associated with tropism, regulation of endocytosis, cell polarization, and response to oxidative stress and cation stress. Associations also include gravity response, tiller angle, panicle number, seed set percent, biological yield, and nitrogen content. Localization evidence places the protein at the basal plasma membrane, auxin efflux carrier complex, recycling endosome, and clathrin-coated endocytic vesicle. Studies of related genes in other species link the PIN family to phototropism, root patterning, and flower development.