PR1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.5HG0433750 (symbol PR1, HvPR1) on barley chromosome 5H encodes a protein containing a CAP (cysteine-rich secretory protein, allergen V5, pathogenesis-related 1) domain, characteristic of the PR-1 family. The gene product is associated with cytokine activity and protein binding, and is linked to immune response activation, cytokine production, and defense responses to bacteria, fungi, herbivores, and wounding. It is associated with systemic acquired resistance, disease resistance, and responses to salicylic acid, jasmonic acid, and ethylene. Associations also include leaf senescence, embryogenesis, sexual reproduction, and responses to cadmium and salt stress. The protein localizes to the extracellular region, plant-type cell wall, vacuole, and secretory vesicles. Studies of related genes in other species link the PR-1 family to salicylic acid-mediated defense, pathogen resistance, and abiotic stress tolerance.