PR5 — Solanum lycopersicum

Summary

SlPR5 (SOLYC08G080610.1) encodes a thaumatin-like protein belonging to the osmotin/thaumatin-like superfamily, with beta-glucanase and endo-1,3(4)-beta-glucanase activity. In tomato, SlPR5 is associated with antifungal innate immune response, induced systemic resistance, and the regulation of proline, lycopene, salicylic acid, auxin, ethylene, and chlorophyll anabolism. It has been linked to ergosterol anabolism, spore germination, fermentation, photoperiodism, metabolic burst, and mRNA breakdown. The protein localises to the vacuole, apoplast, extracellular space, and cytoplasm. SlPR5 is also associated with agronomically relevant traits including fruit shape, sugar content, protein content, seed size, stomatal opening, and sensitivity to acid and abscisic acid. Related genes in other species further link the family to stress and defence responses.