PlantDefenses213-page9 - SAR resistance may be short-lived...

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Plant Stress and Defense Mechanisms - 9 Fungus-induced necrosis The Systemic Acquired Response Not only can plants mount a defense in the infected area, but they also produce chemical signals in the infected area that are translocated to other parts of the plant to provide resistance to infection, as mentioned as one job of the PR proteins. This response is known as a systemic acquired response (SAR). Salicylic acid, produced as part of the hypersensitive response to wounding, functions to activate a systemic acquired response.
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Unformatted text preview: SAR resistance may be short-lived, or last as long as a growing season, and non-specific, but effective. Salicylic acid is particularly effective against some virus infections. Some plants produce the volatile methyl salicylate, which travels through air to both parts of the affected plant and to neighboring plants as a warning. Salicylic acid may also be exported to other parts of the plant initiating defense Pathogen resistant protein (PR) synthesis....
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