Unformatted text preview: fungal pathogens. One PR protein is chitinase, which degrades the chitin walls of fungi. PR proteins also serve as warning molecules within the plant. PR protein response is less rapid than some other plant defenses. • Hydrogen peroxide and nitric acid are often synthesized immediately in the wound area that trigger events leading to cell death of the affected plant cells. These chemicals are often toxic to the pathogen as well. • When a gene specific defense is successful, the plant typically seals off the infected area forming a necrosis, destroying both its own tissue and the pathogen....
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- Fall '09
- Bacteria, pathogen receptor protein