SUS1 — Cucumis sativus

Summary

CSA_1G597800 (SUS1) in cucumber (Cucumis sativus) on chromosome 1 encodes a sucrose synthase enzyme (EC 2.4.1.13) with sucrose synthase activity, and also exhibits DNA binding and transcription factor activity. The protein localizes to the cytosol, nucleus, vacuole, and plasmodesmata. SUS1 is associated with sucrose biosynthesis, phloem unloading, nectar secretion, and responses to flooding, sorbitol, mannitol, and nitrate starvation. It is linked to fruit sweetness, total soluble sugar content, fruit quality, grain yield, abscisic acid content, seedling vigor, leaf thickness, photoperiod sensitivity, chlorophyll metabolism, pigmentation, and regulation of photosynthesis. The gene is also connected to hypoxia tolerance, sink strength, ethanol production, waterlogging susceptibility, osmotic stress, drought response, cold stress tolerance, and sugar homeostasis. Studies of related genes in other species link the family to grain yield, starch biosynthesis, and drought tolerance.