PR5 — Oryza sativa Indica Group

Summary

BGIOSGA010104 (symbol PR5, also known as OiPR5 or OSM34) on chromosome 3 of Indica rice encodes a thaumatin-like protein belonging to the osmotin/thaumatin-like superfamily, with beta-glucanase, endo-1,3(4)-beta-glucanase, serine-type endopeptidase inhibitor, glycosidase and protein-binding activities. The gene is associated with defence responses to fungi, bacteria and viruses, as well as responses to jasmonic acid, ethylene, UV-B, arachidonate, salinity and osmotic stress. It is linked to seed germination, signal transduction, the TCA cycle, phenylpropanoid anabolism, and antifungal innate immune responses involving cell killing. The product localises to secretory vesicles, vacuoles and the extracellular space. Associations with grain yield, photosynthetic rate and respiration rate have been recorded. Related genes in other species link the family to abscisic acid responses, proline accumulation, viral susceptibility, and traits including drought tolerance, stomatal resistance, root length and chlorophyll content.