PR1 — Arabidopsis thaliana

Summary

AT2G14610, known as PR1 in Arabidopsis thaliana, encodes a pathogenesis-related protein belonging to the CAP (cysteine-rich secretory proteins, antigen 5, and pathogenesis-related 1) superfamily, possessing cytokine activity and protein binding functions. This gene is associated with defense responses, including resistance to fungal pathogens such as Botrytis cinerea and Fusarium oxysporum, as well as to Cucumber mosaic virus and herbivores. It is linked to salicylic acid-mediated defense, systemic resistance, and abiotic stress tolerance. PR1 is localized to the apoplast, plant-type cell wall, and secretory vesicles. Associations with agronomic traits include biomass yield, chlorophyll content, plant height, root length, germination rate, and responses to salt and drought stress. Related genes in other species link the PR1 family to pathogen and disease resistance.