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

Geraldine Le Mire, Ali Siah, Marie-Noëlle Brisset, Matthieu Gaucher, Magali Deleu and M. Haissam Jijakli
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Geraldine Le Mire: Laboratoire de Phytopathologie Intégrée et Urbaine, Centre de Recherche TERRA, Gembloux Agro Bio-Tech, Université de Liège, Passage des Déportés 2, 5030 Gembloux, Belgium
Ali Siah: Institut Supérieur d’Agriculture (ISA) Lille—Institut de Recherche Charles Violette (EA 7394), 48 Boulevard Vauban, F-59046 Lille CEDEX, France
Marie-Noëlle Brisset: IRHS, INRA, AGROCAMPUS-Ouest, Université d’Angers, SFR 4207 QUASAV, 42 rue Georges Morel, 49071 Beaucouzé, France
Matthieu Gaucher: IRHS, INRA, AGROCAMPUS-Ouest, Université d’Angers, SFR 4207 QUASAV, 42 rue Georges Morel, 49071 Beaucouzé, France
Magali Deleu: Laboratoire de Biophysique Moléculaire aux Interfaces, Centre de Recherche TERRA, Gembloux Agro Bio-Tech, Université de Liège, Passage des Déportés 2, 5030 Gembloux, Belgium
M. Haissam Jijakli: Laboratoire de Phytopathologie Intégrée et Urbaine, Centre de Recherche TERRA, Gembloux Agro Bio-Tech, Université de Liège, Passage des Déportés 2, 5030 Gembloux, Belgium

Agriculture, 2018, vol. 8, issue 1, 1-14

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.

Keywords: biocontrol; surfactin; induced resistance; winter wheat; Zymoseptoria tritici (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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