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Elicitor screening to protect winter wheat against Septoria tritici Blotch: preliminary results
Le Mire, Géraldine; Deleu, Magali; Ongena, Marc et al.
2014Natural Products and Biocontrol 2014
Peer reviewed
 

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Keywords :
Wheat; Elicitors; SND; Septoria tritici; Blé; Eliciteurs; SDN
Abstract :
[en] Elicitors are plant immunity-triggering compounds which are currently considered as one of the most promising tools in agriculture for the induction of plant resistance to various diseases (Mejía-Teniente et al., 2010). By contributing to both economic and environmental performances of agroecosystems, they can help reducing the use of chemical inputs. Although some elicitor products are already available on the market, it appears that a variable efficiency in the field, along with an uneasy integration in the current legislation and agricultural strategies, make these tools difficult to use (Walters, Ratsep, & Havis, 2013). Besides these limitations, few elicitor treatments have yet been efficiently and specifically designed to protect crop plants such as wheat, which is grown and consumed worldwide, against major diseases threatening both their yield and quality. There is a strong need to better understand the mechanisms of induced resistance in plants and develop elicitor use in agriculture. A phD research is currently led in Gembloux Agro Bio-Tech to develop a method based on eliciting agents, tested in greenhouse and field conditions, to protect winter wheat against major diseases, namely Septoria tritici, Fusarium graminearum and Fusarium culmorum. This project focuses on the screening of a large number of elicitors from different origins and structures. In 2014, we focused the first screening experiments on the protection of wheat against Septoria tritici Blotch (STB). Two winter wheat genotypes were tested: susceptible ‘Avatar’ and semi-resistant ‘Sy Epson’. Plants at 3-leaf stage were first sprayed till runoff with different concentrations of elicitors, and then inoculated 5 days later with a Septoria tritici spore suspension (106 spores mL-1) using a hand sprayer. Control plants were treated, prior to disease inoculation, with sterile water (negative control) or with BION® (ASM, Syngenta Europe; positive control). The disease severity and incidence were scored every 2 days for 28 days post-inoculation (d.p.i) by measuring the percentage of area covered with lesions and bearing pycnidia on the third leaf. The first results of these tests should enable a first discrimination of elicitors considering their dose-efficiency to reduce disease severity. After further screening of all the elicitors in hand, a determination of the elicitation pathways of the most efficient molecules tested will be undertaken. We intend to study the influence of various factors (i.e Temperature, relative humidity, plant development stage) on the elicitation potential and develop a formulation to be finally tested under field conditions.
Research center :
Gembloux Agro Bio-Tech
Disciplines :
Agriculture & agronomy
Author, co-author :
Le Mire, Géraldine ;  Université de Liège - ULiège > Sciences agronomiques > Phytopathologie
Deleu, Magali  ;  Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Ongena, Marc ;  Université de Liège - ULiège > Chimie et bio-industries > Bio-industries
Fauconnier, Marie-Laure  ;  Université de Liège - ULiège > Chimie et bio-industries > Chimie générale et organique
Siah, Ali;  Institut Supérieur d’Agriculture (ISA) > Laboratoire Régional de Recherche en Agroalimentaire et Biotechnologies Charles Viollette > Equipe Biotechnologie et Gestion des Agents Pathogènes en agriculture (BioGAP)
Jijakli, Haissam  ;  Université de Liège - ULiège > Sciences agronomiques > Phytopathologie
Language :
English
Title :
Elicitor screening to protect winter wheat against Septoria tritici Blotch: preliminary results
Alternative titles :
[fr] Screening d'eliciteurs pour la protection du blé d'hivers contre Septoria tritici: résultats préliminaires
Publication date :
September 2014
Event name :
Natural Products and Biocontrol 2014
Event organizer :
Université de Perpignan Via Domitia (UPVD), Pesticides Organiques d’Origine Naturelle (PO2N), International Biocontrol Manufacturers Association (IBMA), Pôle de compétitivité Qualiméditerranée, CCI International Languedoc-Roussillon
Event place :
Perpignan, France
Event date :
du 24 septembre 2014 au 26 septembre 2014
Audience :
International
Peer reviewed :
Peer reviewed
Name of the research project :
Development of formulated elicitors to control bioagressors of wheat
Available on ORBi :
since 20 October 2014

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