SUS2 — Daucus carota subsp. sativus

Summary

DCAR_002857 (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 Glyco_trans_1 family. In carrot, the gene is associated with soluble sugar content. Annotated associations link DcSUS2 to sucrose, starch and cellulose metabolism, protein tetramerization, root development, nodulation, signal transduction, and responses to carbon dioxide, anoxia and mannitol. The gene is also associated with guard cell starch accumulation, cellulose biosynthesis, tuber and vascular development, seed development timing, metabolic homeostasis, and traits including respiration rate, photosynthetic rate, and sugar content. Studies of related genes in other species link the family to seed weight, fruit sweetness, starch concentration, tuber morphology, cold-induced sweetening, and responses to dehydration and hypoxia.