PR3 — Beta vulgaris subsp. vulgaris

Summary

BVRB_1G007720 (PR3) on sugar beet chromosome 1 encodes a protein with a glycosyl hydrolase family 19 catalytic domain and a chitin-binding domain, possessing chitinase and beta-N-acetylglucosaminidase activities and chitin binding. The gene is associated with defence responses to fungi, hypersensitive response-programmed cell death, chitin and polysaccharide breakdown, amino sugar metabolism, and jasmonic acid/ethylene-dependent systemic resistance signalling. It is linked to ethylene sensitivity, photosynthetic rate, root length, and disease tolerance. Associations include pathogen resistance, disease resistance, nematode resistance, salt tolerance, seed germination under salt stress, wilt symptom development, anthocyanin biosynthesis, and mycorrhization. The protein localises to secretory vesicles, vacuoles, the extracellular space, and protoplasm. Studies of related genes in other species link the family to pathogen defense, virus resistance, and disease resistance to Botrytis cinerea and bacterial wilt.