RS1 — Cucumis sativus

Summary

CsRFS (CSA_4G631570, also known as RS1, SIP1, RFS1) on cucumber chromosome 4 encodes a galactinol–sucrose galactosyltransferase (raffinose synthase, EC 2.4.1.82) with a glycosyl hydrolase 36 domain. The gene is associated with raffinose, stachyose and oligosaccharide anabolism, phloem unloading and transport, sucrose transport, nectar secretion, pollen maturation, induced systemic resistance, defense responses, and NO storage. It has been linked to raffinose content, drought tolerance, oxidative stress tolerance (H₂O₂), and disease tolerance/resistance. Studies of related genes in other species connect the family to leaf water potential, stomatal resistance, proline content, root length, self-incompatibility, and late flowering with reduced fertility.