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Agriculture 2018, 8(1), 11; https://doi.org/10.3390/agriculture8010011

Surfactin Protects Wheat against Zymoseptoria tritici and Activates Both Salicylic Acid- and Jasmonic Acid-Dependent Defense Responses

1
Laboratoire de Phytopathologie Intégrée et Urbaine, Centre de Recherche TERRA, Gembloux Agro Bio-Tech, Université de Liège, Passage des Déportés 2, 5030 Gembloux, Belgium
2
Institut Supérieur d’Agriculture (ISA) Lille—Institut de Recherche Charles Violette (EA 7394), 48 Boulevard Vauban, F-59046 Lille CEDEX, France
3
IRHS, INRA, AGROCAMPUS-Ouest, Université d’Angers, SFR 4207 QUASAV, 42 rue Georges Morel, 49071 Beaucouzé, France
4
Laboratoire de Biophysique Moléculaire aux Interfaces, Centre de Recherche TERRA, Gembloux Agro Bio-Tech, Université de Liège, Passage des Déportés 2, 5030 Gembloux, Belgium
*
Author to whom correspondence should be addressed.
Received: 28 November 2017 / Revised: 21 December 2017 / Accepted: 4 January 2018 / Published: 9 January 2018
(This article belongs to the Special Issue Sustainable Crop Production Intensification)
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Abstract

Natural elicitors induce plant resistance against a broad spectrum of diseases, and are currently among the most promising biocontrol tools. The present study focuses on the elicitor properties of the cyclic lipopeptide surfactin on wheat, in order to stimulate the defenses of this major crop against the challenging fungal pathogen Zymoseptoria tritici. The protection efficacy of surfactin extracted from the strain Bacillus amyloliquefaciens S499 was investigated through greenhouse trials. Surfactin protected wheat by 70% against Z. tritici, similarly to the chemical reference elicitor Bion®50WG. In vitro biocidal assays revealed no antifungal activities of surfactin towards the pathogen. A biomolecular RT-qPCR based low-density microarray tool was used to study the relative expression of 23 wheat defense genes. Surfactin significantly induced wheat natural defenses by stimulating both salicylic acid- and jasmonic acid-dependent signaling pathways. Surfactin was successfully tested as an elicitor on the pathosystem wheat–Z. tritici. These results promote further sustainable agricultural practices and the reduction of chemical inputs. View Full-Text
Keywords: biocontrol; surfactin; induced resistance; winter wheat; Zymoseptoria tritici biocontrol; surfactin; induced resistance; winter wheat; Zymoseptoria tritici
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Le Mire, G.; Siah, A.; Brisset, M.-N.; Gaucher, M.; Deleu, M.; Jijakli, M.H. Surfactin Protects Wheat against Zymoseptoria tritici and Activates Both Salicylic Acid- and Jasmonic Acid-Dependent Defense Responses. Agriculture 2018, 8, 11.

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