PR5 — Solanum lycopersicum

Summary

SlPR5 (SOLYC03G079960.4) encodes a protein belonging to the osmotin/thaumatin-like superfamily with glucan endo-1,3-beta-D-glucosidase activity. The protein localises to the apoplast, cell wall, vacuole, plasmodesmata and secretory vesicles. SlPR5 is associated with responses to osmotic stress, abscisic acid, cadmium, UV-B and salicylic acid, and with defence responses including resistance to fungal pathogens, Pseudomonas syringae, Verticillium dahliae and insects. The gene is linked to proline accumulation, salt and drought tolerance, and traits such as fruit shape, sugar content, seed size, protein content and stomatal opening. It is also associated with the biosynthesis of lycopene, anthocyanin, chlorophyll, auxin, ethylene and salicylic acid, as well as photoperiodism and fermentation. Studies of related genes in other species link the family to seed germination under salt stress, cell wall integrity, induced systemic resistance and viral susceptibility.