Article (Scientific journals)
Volatiles of bacteria associated with parasitoid habitats elicit distinct olfactory responses in an aphid parasitoid and its hyperparasitoid
Goelen, T.; Sobhy, I. S.; Vanderaa, C. et al.
2020In Functional Ecology, 34 (2), p. 507-520
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Keywords :
Aphidius colemani; Dendrocerus aphidum; VOCs; Aphididae; Bacteria (microorganisms); Cucumis melo var. inodorus; Hexapoda
Abstract :
[en] To locate mating partners and essential resources such as food, oviposition sites and shelter, insects rely to a large extent on chemical cues. While most research has focused on cues derived from plants and insects, there is mounting evidence that indicates that micro-organisms emit volatile compounds that may play an important role in insect behaviour. In this study, we assessed how volatile compounds emitted by phylogenetically diverse bacteria affected the olfactory response of the primary parasitoid Aphidius colemani and one of its secondary parasitoids, Dendrocerus aphidum. Olfactory responses were evaluated for volatile blends emitted by bacteria isolated from diverse sources from the parasitoid's habitat, including aphids, aphid mummies and honeydew, and from the parasitoids themselves. Results revealed that A. colemani showed a wide variation in response to bacterial volatiles, ranging from significant attraction over no response to significant repellence. Our results further showed that the olfactory response of A. colemani to bacterial volatile emissions was different from that of D. aphidum. Gas chromatography-mass spectrometry analysis of the volatile blends revealed that bacterial strains repellent to A. colemani produced significantly higher amounts of esters, organic acids, aromatics and cycloalkanes than attractive strains. Strains repellent to D. aphidum produced significantly higher amounts of alcohols and ketones, whereas the strains attractive to D. aphidum produced higher amounts of the monoterpenes limonene, linalool and geraniol. Overall, our results indicate that bacterial volatiles can have an important impact on insect olfactory responses, and should therefore be considered as an additional, so far often overlooked factor in studying multitrophic interactions between plants and insects. A free Plain Language Summary can be found within the Supporting Information of this article. © 2019 British Ecological Society
Disciplines :
Agriculture & agronomy
Author, co-author :
Goelen, T.;  Laboratory for Process Microbial Ecology and Bioinspirational Management (PME&BIM), Department of Microbial and Molecular Systems, KU Leuven, Leuven, Belgium
Sobhy, I. S.;  Laboratory for Process Microbial Ecology and Bioinspirational Management (PME&BIM), Department of Microbial and Molecular Systems, KU Leuven, Leuven, Belgium, Department of Plant Protection, Faculty of Agriculture, Suez Canal University, Ismailia, Egypt
Vanderaa, C.;  Laboratory of Socio-Ecology & Social Evolution, Biology Department, KU Leuven, Leuven, Belgium
de Boer, J. G.;  Department of Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands
Delvigne, Frank  ;  Université de Liège - ULiège > Département GxABT > Microbial, food and biobased technologies
Francis, Frédéric  ;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Wäckers, F.;  Biobest, Westerlo, Belgium, Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom
Rediers, H.;  Laboratory for Process Microbial Ecology and Bioinspirational Management (PME&BIM), Department of Microbial and Molecular Systems, KU Leuven, Leuven, Belgium
Verstrepen, K. J.;  Lab for Systems Biology, VIB Center for Microbiology & Centre of Microbial and Plant Genetics (CMPG) Lab for Genetics and Genomics, Department of Microbial and Molecular Systems, KU Leuven, Leuven, Belgium
Wenseleers, T.;  Laboratory of Socio-Ecology & Social Evolution, Biology Department, KU Leuven, Leuven, Belgium
Jacquemyn, H.;  Laboratory of Plant Conservation and Population Biology, Biology Department, KU Leuven, Leuven, Belgium
Lievens, B.;  Laboratory for Process Microbial Ecology and Bioinspirational Management (PME&BIM), Department of Microbial and Molecular Systems, KU Leuven, Leuven, Belgium
Language :
English
Title :
Volatiles of bacteria associated with parasitoid habitats elicit distinct olfactory responses in an aphid parasitoid and its hyperparasitoid
Publication date :
2020
Journal title :
Functional Ecology
ISSN :
0269-8463
eISSN :
1365-2435
Publisher :
Blackwell Publishing Ltd
Volume :
34
Issue :
2
Pages :
507-520
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Fonds Wetenschappelijk Onderzoek, FWOFonds Wetenschappelijk Onderzoek, FWO: 1S15116316N
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since 10 September 2020

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