The Role of Salicylic Acid in Plant Resistance Against Plant Pathogens

Salicylic acid basically is one of the phenolic acids compounds which are necessary for inducing systemic acquired resistance is produced in plants in response to a large number of plant pathogens. Salicylic acid is responsible for expression of the pathogen related proteins. This is produced in plants in connection with hypersensitive reaction and systemic acquired resistance. Some changes which inhibit the salicylic acid production as well as its deactivation in plants, can increase the disease susceptibility to plant pathogens. The role of salicylic acid and the required pathways in inducing systemic acquired resistance and final yield increase have been described.