PR3 — Cucumis sativus

Summary

CsPR3 (CSA_3G002420) on cucumber chromosome 3 encodes a protein with a glycosyl hydrolase family 19 catalytic domain and a chitin-binding domain, and is annotated with chitinase activity and chitin binding. In cucumber, this gene is associated with pathogen defense, systemic acquired resistance, and defense responses to fungi, as well as hypersensitive response programmed cell death, cell death, hydrogen peroxide biosynthesis, and virus-induced post-transcriptional gene silencing. It is linked to ethylene sensitivity, photosynthetic rate, and traits including disease resistance, salt tolerance, seed germination under salt stress, nematode resistance, and mycorrhization. The protein localizes to secretory vesicles, vacuoles, and the extracellular space. Studies of related genes in other species connect the family to resistance against Botrytis cinerea and bacterial wilt, and to agronomic traits such as fruit weight, fruit firmness, and harvest index.