PR5 — Cucumis sativus

Summary

CsPR5 (CSA_5G155460) on cucumber chromosome 5 encodes a thaumatin-like protein belonging to the osmotin/thaumatin-like superfamily, with beta-glucanase and hydrolase activities and mRNA-binding capability. The protein localises to the apoplast, cell wall, vacuole, plasmodesmata and secretory vesicles. CsPR5 is associated with antifungal and antibacterial defence, systemic acquired resistance, response to viruses, jasmonic acid, ethylene and UV-B, as well as sex determination, stomatal closure, seed germination, anthocyanin regulation, cadmium response and ABA signalling. Phenotypic associations include disease resistance, osmotic stress response, salt and drought tolerance, proline accumulation, insect resistance, and resistance to Verticillium dahliae and Pseudomonas syringae. Studies of related genes in other species link the family to pathogen resistance, induced systemic resistance, herbivore defence, nematode resistance, cell wall integrity and seed germination under salt stress.