The primary function of the hypersensitive response (HR) in plants is to provide a defense mechanism against pathogen invasion, particularly from viruses, bacteria, and fungi. When plant cells recognize the presence of a pathogen, they can trigger the HR, which leads to localized programmed cell death at the site of infection. This cell death helps to limit the spread of the pathogen by sacrificing infected cells and creating a barrier to further infection. Additionally, the HR often involves the activation of various defense-related genes, the production of antimicrobial compounds, and the strengthening of plant cell walls, all of which contribute to the plant's overall defense strategy. Overall, the hypersensitive response is an essential component of a plant's innate immune system, helping to protect it from disease.
What is the primary function of the hypersensitive response (HR) in plants?
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