PR1 — Brassica oleracea var. botrytis

Summary

BoPR1, the cauliflower gene on chromosome 3, encodes a CAP-domain-containing protein with cytokine activity and protein binding functions. It is associated with activation of immune response, defence against fungi and other organisms, ethylene response, sexual reproduction, and cytokine production. The gene is linked to systemic acquired resistance, salicylic acid signalling, and resistance to pathogens including Rhizoctonia solani, Pseudomonas syringae, Verticillium dahliae, and nematodes, as well as to salt tolerance, cadmium response, and acid rain response. It localises to the extracellular space, plant-type cell wall, vacuole, and secretory vesicles. Studies of related genes in other species connect the PR1 family to disease resistance, herbivore defence, abiotic stress tolerance, and traits such as biomass yield, chlorophyll content, drought tolerance, and germination rate.