AGR — Beta vulgaris subsp. vulgaris

Summary

BvAGR (BVRB_3G061190) on sugar beet chromosome 3 encodes a member of the auxin efflux carrier family, possessing both auxin efflux and influx transmembrane transporter activities, along with inositol-1,4-bisphosphate 1-phosphatase activity and binding affinities for various phosphatidylinositol phosphates and clathrin. The gene is associated with auxin signalling, clathrin-mediated endocytosis, and regulation of seed size, reproductive structure development, and growth processes. It localizes to the auxin efflux carrier complex, recycling endosome, and basal plasma membrane. BvAGR is linked to numerous traits including gravity and phototropism responses, root and shoot architecture, seed set, leaf vein morphology, and sensitivity to blue light, manganese, and herbicides. Studies of related genes in other species connect the family to polar auxin transport, root meristem growth, and embryonic patterning.