ARF — Beta vulgaris subsp. vulgaris

Summary

BvARF (BVRB_3G059640) on sugar beet chromosome 3 encodes a small GTPase of the Arf1-5-like family, with annotated molecular functions including G protein activity, phosphatidylinositol kinase activity, phospholipase activator activity, and actin binding. The gene is associated with vesicle-mediated transport to the plasma membrane, ER-to-Golgi transport, Golgi organization, protein retention in the ER lumen, and regulation of auxin metabolism. It has been linked to traits such as biomass yield, water use efficiency, nitrogen content, root mass density, leaf vein morphology, phototropism, blue light sensitivity, days to flowering, disease tolerance, and responses to ethylene, abscisic acid, low temperature, and oxidative stress. Localization evidence connects the product to Golgi-associated vesicles, COPII-coated vesicles, the cis-Golgi network, early endosomes, and the ER membrane. Studies of related genes in other species link the family to phototropic growth, chloroplast relocation, stomatal aperture opening, and salt and drought tolerance.