Differential Contribution of Transcription Factors to Arabidopsis thaliana Defense Against Spodoptera littoralis.
Détails
Etat: Public
Version: de l'auteur⸱e
ID Serval
serval:BIB_61FBF0AEDF06
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Differential Contribution of Transcription Factors to Arabidopsis thaliana Defense Against Spodoptera littoralis.
Périodique
Frontiers In Plant Science
ISSN
1664-462X (Electronic)
ISSN-L
1664-462X
Statut éditorial
Publié
Date de publication
2013
Peer-reviewed
Oui
Volume
4
Pages
13
Langue
anglais
Résumé
In response to insect herbivory, Arabidopsis plants activate the synthesis of the phytohormone jasmonate-isoleucine, which binds to a complex consisting of the receptor COI1 and JAZ repressors. Upon proteasome-mediated JAZ degradation, basic helix-loop-helix transcription factors (TFs) MYC2, MYC3, and MYC4 become activated and this results in the expression of defense genes. Although the jasmonate (JA) pathway is known to be essential for the massive transcriptional reprogramming that follows herbivory, there is however little information on other TFs that are required for defense against herbivores and whether they contribute significantly to JA-dependent defense gene expression. By transcriptome profiling, we identified 41 TFs that were induced in response to herbivory by the generalist Spodoptera littoralis. Among them, nine genes, including WRKY18, WRKY40, ANAC019, ANAC055, ZAT10, ZAT12, AZF2, ERF13, and RRTF1, were found to play a significant role in resistance to S. littoralis herbivory. Compared to the triple mutant myc234 that is as sensitive as coi1-1 to herbivory, knockout lines of these nine TFs were only partially more sensitive to S. littoralis but, however, some displayed distinct gene expression changes at the whole-genome level. Data thus reveal that MYC2, MYC3, and MYC4 are master regulators of Arabidopsis resistance to a generalist herbivore and identify new genes involved in insect defense.
Mots-clé
Arabidopsis thaliana, Spodoptera littoralis, transcription factors, defense, MYC2, MYC3, MYC4
Pubmed
Web of science
Open Access
Oui
Création de la notice
04/02/2013 13:20
Dernière modification de la notice
20/08/2019 15:18