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

Question

Quizplus · Accepted Answer

Salicylic acid is a signaling molecule that plays a crucial role in the activation of systemic acquired resistance (SAR) in plants. SAR is a defense response that enables plants to protect themselves from a broad range of pathogens by priming uninfected parts of the plant for a quicker and stronger defense response upon subsequent pathogen attacks. Salicylic acid is also involved in the regulation of various other defense responses in plants, such as the production of pathogenesis-related proteins and the reinforcement of cell walls.

What Is the Probable Role of Salicylic Acid in the Defense