EN
Animals possess an inducible antibody immune system that acts as a defence against diseases.It is known that plants can also be active immunized against disease-causing pathogenes.This phenomenon is a result of the development of systemic acquired resistance (SAR).This article discussed recent studies on the role of salicilic acid (SA) in plants during the development of SAR.The understanding of the molecular and physiological background SAR may be applied in modern agrobiotechnology and pharmaceutical industry.