PR1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.5HG0519310 (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, and is associated with cytokine activity and protein binding. The gene is associated with activation of immune response, cytokine production, and defense responses to bacteria, herbivores, wounding, and other organisms. It is linked to systemic acquired resistance, disease resistance, and responses to salicylic acid, jasmonic acid, and ethylene. Associations also include leaf senescence, embryogenesis, sexual reproduction, and traits such as hydrogen peroxide content, salt tolerance, and resistance to pathogens including Rhizoctonia solani and Pseudomonas syringae. The protein localises to the extracellular space, plant-type cell wall, vacuole, and secretory vesicle. Studies of related genes in other species link the PR-1 family to salicylic acid-mediated defense, pathogen resistance, and abiotic stress tolerance.