SUT — Cucumis sativus

Summary

CsSUT (CSA_2G372770) on cucumber chromosome 2 encodes a protein belonging to the sucrose symporter and major facilitator superfamily, with annotated sucrose:proton symporter activity. The gene is associated with phloem sucrose loading and unloading, stachyose metabolism, maltose transport, nectar secretion, and carbohydrate membrane transport. It has been linked to grain yield, unfilled grain number, starch and sucrose content, photosynthetic rate, respiration rate, days to flowering, seed dormancy, root thickness, trichome morphology, lignin biosynthesis, jasmonic acid content, auxin sensitivity, and both abiotic and biotic stress responses including nematode damage and oxidative stress. Localization evidence connects the product to the tonoplast, chloroplast membranes, pollen tube, and preprophase band. Studies of related genes in other species associate the family with phloem transport, carbon partitioning, tuberization, flowering time, grain size, and yield.