PR3 — Cucumis sativus

Summary

CsPR3 (CSA_6G509020) on cucumber chromosome 6 encodes a protein with a Glyco_hydro_19 catalytic domain and a chitin-binding domain, and is associated with chitinase activity and chitin binding. In cucumber, CsPR3 is associated with pathogen defense, systemic acquired resistance, cell death, hydrogen peroxide biosynthetic process, and defense response to fungi. It is linked to ethylene sensitivity, photosynthetic rate, salt tolerance, seed germination under salt stress, nematode resistance, and mycorrhization. The gene product 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 traits including fruit weight, leaf area, and lycopene content.