SPS — Cucumis sativus

Summary

CsSPS (CSA_1G224890) on cucumber chromosome 1 encodes a sucrose-phosphate synthase, an enzyme with both sucrose-phosphate synthase and sucrose-phosphate phosphatase activities, and is also annotated with protein kinase binding, phosphatase activity, and calcium ion binding. The gene is associated with sucrose anabolism and metabolism, nectar secretion, pollen wall assembly, regulation of photosynthesis and photorespiration, adventitious root development, regeneration, and regulation of abscisic acid-mediated signalling. It has been linked to traits including sucrose and sugar content, seed yield, photosynthetic rate, vegetative vigor, flowering time, disease tolerance, cold and oxidative stress responses, stomatal opening and resistance, root development, and shoot branching. The product localises to the cytosol, nucleus, endoplasmic reticulum, plasmodesma, and plasma membrane. Studies of related genes in other species connect the family to fruit sweetness, grain size, heat tolerance, and pathogen susceptibility.