Role of plant hormones in plant defence responses

Plant Mol Biol. 2009 Mar;69(4):473-88. doi: 10.1007/s11103-008-9435-0. Epub 2008 Dec 16.


Plant hormones play important roles in regulating developmental processes and signaling networks involved in plant responses to a wide range of biotic and abiotic stresses. Significant progress has been made in identifying the key components and understanding the role of salicylic acid (SA), jasmonates (JA) and ethylene (ET) in plant responses to biotic stresses. Recent studies indicate that other hormones such as abscisic acid (ABA), auxin, gibberellic acid (GA), cytokinin (CK), brassinosteroids (BR) and peptide hormones are also implicated in plant defence signaling pathways but their role in plant defence is less well studied. Here, we review recent advances made in understanding the role of these hormones in modulating plant defence responses against various diseases and pests.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Animals
  • Cyclopentanes / metabolism
  • Ethylenes / metabolism
  • Indoleacetic Acids / metabolism
  • Oxylipins / metabolism
  • Plant Diseases / microbiology
  • Plant Diseases / parasitology
  • Plant Diseases / virology
  • Plant Growth Regulators / physiology*
  • Plant Physiological Phenomena*
  • Plants / microbiology
  • Plants / parasitology
  • Plants / virology
  • Salicylic Acid / metabolism
  • Signal Transduction


  • Cyclopentanes
  • Ethylenes
  • Indoleacetic Acids
  • Oxylipins
  • Plant Growth Regulators
  • jasmonic acid
  • ethylene
  • Salicylic Acid