ROLE OF SALICYLIC ACID IN PLANTS DEFENSE MECHANISMS AGAINST PATHOGENS

Salicylic acid (SA), a signaling molecule known for its role in plant defense against disease. SA can trigger plant defensive mechanisms, making it a viable alternative to biocidal agrochemicals. The agricultural sector's growing demand for global food supplies is a primary motive behind developing appropriate methods of controlling diseases that are effective not just against target pathogens but also against those that may emerge in the future. Plants have specific structures, compounds, and sophisticated mechanisms that help them fight diseases. Pathogens are continually inventing new ways to break plant defenses, therefore knowing these defense mechanisms and pathways is essential for developing novel disease-prevention treatments. Several signaling molecules that control the production of defense-related compounds are involved in plant defense pathways. SA, ethylene (ET), jasmonic acid (JA), and abscisic acid (ABA) are all involved in these mechanisms. SA is the subject of this review article because of its importance in various ways the plants tolerate to biotic stress. This review article focuses on the role of SA in plant pathogen defense. The mechanisms of action of SA in plant defense, SA and systemic acquired resistance, SA in plant-pathogen resistance, effects of SA on antioxidant systems, and future directions of SA were all discussed in depth. Scientists will be able to create more efficient techniques for safeguarding plants from infections for sustainable agriculture if they have a deeper grasp of plant defense systems.

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