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Salicylic Acid

  1. Ralf R Weigel

Published Online: 16 JUL 2007

DOI: 10.1002/9780470015902.a0020137



How to Cite

Weigel, R. R. 2007. Salicylic Acid. eLS. .

Author Information

  1. Leibniz-Institute of Plant Biochemistry, Weinberg, Halle (Saale), Germany

Publication History

  1. Published Online: 16 JUL 2007


Salicylic acid (SA) is an important signalling molecule in the defence response of plants against microbial pathogens. Plants are sessile and have to cope with environmental challenges without the ability to evade them actively. Responding in an appropriate manner upon pathogen attack is indispensable for their survival.


  • plant innate immunity;
  • plant–pathogen interaction;
  • signal transduction;
  • systemic acquired resistance;
  • NPR1