PR5 — Cucumis sativus

Summary

CsPR5 (CSA_5G374740) on cucumber chromosome 5 encodes a member of the osmotin/thaumatin-like superfamily, with glucan endo-1,3-beta-D-glucosidase activity and mRNA, protein and IgE binding functions. The gene is associated with defence responses to bacteria, fungi and viruses, systemic acquired resistance, and responses to salicylic acid, ethylene, abscisic acid, UV-B, cadmium and salinity. It is linked to regulation of anthocyanin anabolism, killing of cells of other organisms, and localisation to the apoplast, cell wall, vacuole, plasmodesmata, secretory vesicles, membrane and mitochondria. CsPR5 has been connected to osmotic stress response, proline accumulation and biosynthesis, disease resistance including to Verticillium dahliae and Pseudomonas syringae, insect resistance, salt and drought tolerance, and ABA and UV-B stress responses. Studies of related genes in other species link the family to viral susceptibility and seed germination under salt stress.