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Card 18 / 40:
Stomata close in response to bacterial infection. Why is this response a mechanism of defense for the plant? Which hormone is most likely to mediate this response?
To prevent further entry of pathogens, stomata close, even if they restrict entry of CO 2 . Some pathogens secrete virulence factors that inhibit the closing of stomata. Abscisic acid is the stress hormone responsible for inducing closing of stomata.
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