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Molecular dialogue between plant resistance pathways – SAR and ISR

Kulbat K., Szczodrowska A.

Biotechnology and Food Science

2014

Vol. 78, nr 2

129--139

During normal vegetation, plants are exposed to many stress factors, such as the presence of heavy metal ions in the soil, chemical pesticides, excessive UV radiation or pathogenic microorganisms. In response to local infections, plants activate salicylic or jasmonic acid-dependent signaling pathways. Systemic Acquired Resistance (SAR) and Induced Systemic Resistance (ISR) are two forms of induced resistance. The SAR pathway requires the accumulation of endogenous salicylic acid and provides protection against biotrophic pathogens. ISR requires the biosynthesis of jasmonic acid and protects against necrotrophic pathogens. Based on recent scientific research, cross-talk between SAR and ISR signaling pathways is thought to be involved in whole-plant resistance against a wide range of pathogens.