SUS2 — Solanum tuberosum

Summary

PGSC0003DMG400006672, also known as SUS2, SUS3, or SUS4, encodes a sucrose synthase enzyme (EC 2.4.1.13) with sucrose synthase and transglycosidase activity, belonging to the sucrose synthase and glycosyltransferase families. In potato, this gene is associated with cold-induced sweetening. It is linked to numerous biological processes including triglyceride storage, entry into dormancy, phloem unloading, glucose homeostasis, and response to biotic stimulus. The gene has been connected to agronomically important traits such as tuber morphology, starch content and yield, reducing sugar and hexose content, harvest index, drought tolerance, photosynthetic rate, chlorophyll content, and plant height. It is also associated with guard cell starch accumulation, cellulose biosynthesis, tuber development, and vascular development. Studies of related genes in other species link the family to starch biosynthesis, dehydration tolerance, and seed storage product biosynthesis.