Plant Molecular Biology

, Volume 69, Issue 4, pp 473–488 | Cite as

Role of plant hormones in plant defence responses

  • Rajendra Bari
  • Jonathan D. G. Jones


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.


Hormones Plant defence Pathogen Virulence Signaling Peptide Biotrophs Necrotrophs 



We apologize to our colleagues whose work could not be cited in this review because of space limitations. We thank, Lionel Navarro, Alexandre Robert-Seilaniantz and Georgina Fabro for critical comments. The Sainsbury Lab is funded by the Gatsby Charitable Foundation. R. Bari is funded by a grant from the BBSRC.


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© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.The Sainsbury LaboratoryJohn Innes CentreNorwichUK

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