PFG3 — Beta vulgaris subsp. vulgaris

Summary

BvPFG3 (also known as BvMYB111, BvMYB12) on sugar beet chromosome 5 encodes a Myb-family transcription factor with sequence-specific DNA-binding and transcription-regulatory activity, localised to the nucleus. In sugar beet, it is associated with flavonol regulation and the upregulation of flavonol, phlobaphene, phytoalexin and pigment biosynthetic processes, as well as pigment accumulation in tissues. The gene is linked to responses to UV-B, stress, and insect defense, leaf senescence and morphogenesis, cell differentiation, and detoxification. Associations with leaf growth, leaf composition, silique morphology, and shoot organ morphogenesis have been noted. Studies of related genes in other species connect the family to flavonol glycoside accumulation, anthocyanin biosynthesis, leaf morphology, and stress tolerance, while broader sequence similarity links the family to fruit traits, carotenoid and chlorophyll content, drought tolerance, and seed dormancy.