PR1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.5HG0433760 (HvPR1) on barley chromosome 5H encodes a protein containing a CAP (cysteine-rich secretory protein) domain, characteristic of the PR-1 family, and is annotated with cytokine activity and protein binding. In barley, HvPR1 is associated with activation of immune response, defense against bacteria and fungi, response to herbivore, wounding, and the phytohormones salicylic acid, jasmonic acid, and ethylene. It is also linked to leaf senescence, embryogenesis, sexual reproduction, and localization to the extracellular space, plant-type cell wall, vacuole, and secretory vesicles. Associations with disease resistance, systemic acquired resistance, salt tolerance, and responses to cadmium and acid rain have been reported. Studies of related genes in other species link the PR-1 family to pathogen resistance, salicylic acid-mediated defense, and abiotic stress tolerance.