Insect eggs induce a systemic acquired resistance in Arabidopsis.

Détails

Ressource 1Télécharger: BIB_D232C60CE950.P001.pdf (1783.12 [Ko])
Etat: Public
Version: Author's accepted manuscript
ID Serval
serval:BIB_D232C60CE950
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Insect eggs induce a systemic acquired resistance in Arabidopsis.
Périodique
Plant Journal
Auteur(s)
Hilfiker O., Groux R., Bruessow F., Kiefer K., Zeier J., Reymond P.
ISSN
1365-313X (Electronic)
ISSN-L
0960-7412
Statut éditorial
Publié
Date de publication
2014
Peer-reviewed
Oui
Volume
80
Numéro
6
Pages
1085-1094
Langue
anglais
Résumé
Although they constitute an inert stage of the insect's life, eggs trigger plant defences that lead to egg mortality or attraction of egg parasitoids. We recently found that salicylic acid (SA) accumulates in response to oviposition by the Large White butterfly Pieris brassicae, both in local and systemic leaves, and that plants activate a response that is similar to the recognition of pathogen-associated molecular patterns (PAMPs), which are involved in PAMP-triggered immunity (PTI). Here we discovered that natural oviposition by P. brassicae or treatment with egg extract inhibit growth of different Pseudomonas syringae strains in Arabidopsis through the activation of a systemic acquired resistance (SAR). This egg-induced SAR involves the metabolic SAR signal pipecolic acid, depends on ALD1 and FMO1, and is accompanied by a stronger induction of defence genes upon secondary infection. Although P. brassicae larvae showed a reduced performance when feeding on Pseudomonas syringae-infected plants, this effect was less pronounced when infected plants had been previously oviposited. Altogether, our results indicate that egg-induced SAR might have evolved as a strategy to prevent the detrimental effect of bacterial pathogens on feeding larvae.
Mots-clé
insect eggs, systemic acquired resistance, pipecolic acid, herbivory, Arabidopsis thaliana, Pieris brassicae
Pubmed
Web of science
Open Access
Oui
Création de la notice
16/12/2014 17:15
Dernière modification de la notice
20/08/2019 15:52
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