Jasmonate controls polypeptide patterning in undamaged tissue in wounded Arabidopsis leaves.

Détails

ID Serval
serval:BIB_574326F89BB7
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Jasmonate controls polypeptide patterning in undamaged tissue in wounded Arabidopsis leaves.
Périodique
Plant Physiology
Auteur⸱e⸱s
Gfeller A., Baerenfaller K., Loscos J., Chételat A., Baginsky S., Farmer E.E.
ISSN
1532-2548 (Electronic)
ISSN-L
0032-0889
Statut éditorial
Publié
Date de publication
2011
Volume
156
Numéro
4
Pages
1797-1807
Langue
anglais
Résumé
Wounding initiates a strong and largely jasmonate-dependent remodelling of the transcriptome in the leaf blades of Arabidopsis (Arabidopsis thaliana). How much control do jasmonates exert on wound-induced protein repatterning in leaves? Replicated shotgun proteomic analyses of 2.5-mm-wide leaf strips adjacent to wounds revealed 106 differentially regulated proteins. Many of these gene products have not emerged as being wound regulated in transcriptomic studies. From experiments using the jasmonic acid (JA)-deficient allene oxide synthase mutant we estimated that approximately 95% of wound-stimulated changes in protein levels were deregulated in the absence of JA. The levels of two tonoplast proteins already implicated in defense response regulation, TWO-PORE CHANNEL1 and the calcium-V-ATPase ACA4 increased on wounding, but their transcripts were not wound inducible. The data suggest new roles for jasmonate in controlling the levels of calcium-regulated pumps and transporters, proteins involved in targeted proteolysis, a putative bacterial virulence factor target, a light-dependent catalyst, and a key redox-controlled enzyme in glutathione synthesis. Extending the latter observation we found that wounding increased the proportion of oxidized glutathione in leaves, but only in plants able to synthesize JA. The oxidizing conditions generated through JA signaling near wounds help to define the cellular environment in which proteome remodelling occurs.
Mots-clé
Arabidopsis/drug effects, Arabidopsis/genetics, Arabidopsis Proteins/genetics, Arabidopsis Proteins/metabolism, Cyclopentanes/pharmacology, Gene Expression Regulation, Plant/drug effects, Glutathione/metabolism, High-Throughput Screening Assays, Organ Specificity/drug effects, Oxidation-Reduction/drug effects, Oxylipins/pharmacology, Peptides/genetics, Peptides/metabolism, Plant Leaves/drug effects, Plant Leaves/metabolism, Proteomics, RNA, Messenger/genetics, RNA, Messenger/metabolism
Pubmed
Web of science
Open Access
Oui
Création de la notice
17/01/2012 12:57
Dernière modification de la notice
20/08/2019 15:11
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