PR3 — Phaseolus vulgaris

Summary

PHAVU_009G116600, designated PvPR3 on chromosome 9 of French bean (Phaseolus vulgaris), encodes a protein with chitinase activity and chitin binding, belonging to the glycoside hydrolase family 19. The gene is associated with chitin breakdown, cell wall macromolecule catabolic process, polysaccharide breakdown, and carbohydrate metabolism. It is linked to defence response to fungi, jasmonic acid/ethene-dependent systemic resistance, and signal transduction. PvPR3 has been connected to ethylene sensitivity, wilt symptom development, nematode resistance, salt tolerance, seed germination under salt stress, and pathogen resistance. The protein localises to the protoplasm, secretory vesicle, vacuole, plant-type vacuole, and extracellular space. Studies of related genes in other species link the family to hydrogen peroxide content, root number, plant height, chlorophyll content, and disease tolerance.