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90) what is the probable role of salicylic acid in the defense responses of plants? a) destroy pathogens directly b) activate systemic acquired resistance of plants c) close stomata, thus preventing the entry of pathogens d) activate heat-shock proteins e) sacrifice infected tissues by hydrolyzing cells

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The role of salicylic acid is C. closing the stomata, thereby preventing the entry of pathogens

Growth hormone is an organic compound either naturally occurring or man-made that can promote plant growth and development. Hormones control plant growth and development, by influencing cell division, cell elongation, and cell differentiation.

Salicylic acid is a phenolic compound that acts as a hormone in plants that plays a role in improving the negative effects of abiotic stress. Salicylic acid at optimal concentrations can affect plant physiological processes such as seed germination and stomata closure. This hormone will close the stomata thereby preventing pathogens from entering and forming local resistance so as not to dry out.

Learn more about salicylic acid at:

https://brainly.com/question/14635153

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