SUS2 — Daucus carota subsp. sativus

Summary

DCAR_002856 (DcSUS2, also known as DcSUS3) on carrot chromosome 1 encodes a sucrose synthase, an enzyme with sucrose synthase and transglycosidase activities that belongs to the glycosyltransferase family. In carrot, this gene is associated with soluble sugar content, and the encoded protein is linked to sucrose and starch metabolism, cellulose anabolism, root development, nodulation, protein tetramerization, and responses to carbon dioxide, anoxia, and mannitol. It has been connected to total soluble sugar content, sucrose content, photosynthetic rate, respiration rate, guard cell starch accumulation, cellulose biosynthesis, tuber and vascular development, seed development timing, metabolic homeostasis, and lipid content. Studies of related genes in other species link the family to seed development, starch biosynthesis, and dehydration stress tolerance, and to cold-induced sweetening.