PR1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.5HG0519330, designated HvPR1 on barley chromosome 5H, encodes a protein containing a CAP (cysteine-rich secretory protein, antigen 5, and pathogenesis-related 1) domain, placing it in the PR-1 family. The product is associated with cytokine activity and protein binding, and is localized to the secretory vesicle, vacuole, plant-type cell wall, and extracellular space. HvPR1 is associated with activation of immune response, defense response to other organism, response to herbivore, response to salicylate, response to jasmonic acid, response to ethylene, response to wounding, leaf senescence, embryogenesis, and sexual reproduction. The gene has been associated with disease resistance, systemic acquired resistance, salt tolerance, lateral root development, and responses to cadmium and acid rain. Studies of related genes in other species link the PR-1 family to salicylic acid-mediated defense, pathogen resistance, and systemic immunity.