Combined biotic stresses trigger similar transcriptomic responses but contrasting resistance against a chewing herbivore in Brassica nigra.

Détails

Ressource 1Télécharger: s12870-017-1074-7.pdf (1067.11 [Ko])
Etat: Serval
Version: Final published version
ID Serval
serval:BIB_0CCF15EEDC82
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Combined biotic stresses trigger similar transcriptomic responses but contrasting resistance against a chewing herbivore in Brassica nigra.
Périodique
BMC Plant Biology
Auteur(s)
Bonnet C., Lassueur S., Ponzio C., Gols R., Dicke M., Reymond P.
ISSN
1471-2229 (Electronic)
ISSN-L
1471-2229
Statut éditorial
Publié
Date de publication
2017
Peer-reviewed
Oui
Volume
17
Numéro
1
Pages
127
Langue
anglais
Résumé
In nature, plants are frequently exposed to simultaneous biotic stresses that activate distinct and often antagonistic defense signaling pathways. How plants integrate this information and whether they prioritize one stress over the other is not well understood.
We investigated the transcriptome signature of the wild annual crucifer, Brassica nigra, in response to eggs and caterpillars of Pieris brassicae butterflies, Brevicoryne brassicae aphids and the bacterial phytopathogen Xanthomonas campestris pv. raphani (Xcr). Pretreatment with egg extract, aphids, or Xcr had a weak impact on the subsequent transcriptome profile of plants challenged with caterpillars, suggesting that the second stress dominates the transcriptional response. Nevertheless, P. brassicae larval performance was strongly affected by egg extract or Xcr pretreatment and depended on the site where the initial stress was applied. Although egg extract and Xcr pretreatments inhibited insect-induced defense gene expression, suggesting salicylic acid (SA)/jasmonic acid (JA) pathway cross talk, this was not strictly correlated with larval performance.
These results emphasize the need to better integrate plant responses at different levels of biological organization and to consider localized effects in order to predict the consequence of multiple stresses on plant resistance.

Mots-clé
Brassica nigra, Brevicoryne brassicae, Combined stresses, Herbivory, Pieris brassicae, Transcriptome, Xanthomonas campestris pv. raphani (Xcr)
Pubmed
Web of science
Open Access
Oui
Création de la notice
22/08/2017 14:56
Dernière modification de la notice
08/05/2019 14:21
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