[en] Aphids (Hemiptera: Aphididae) maintain intimate relationships with a variety of symbiotic bacteria that can be important drivers of their evolutionary ecology. In addition to the obligate endosymbiont Buchnera aphidicola, aphids may harbor a series of facultative symbionts that can affect their physiology, as they may be involved in heat resistance, nutrition, reproduction and defense against parasitoids. Since the presence of facultative symbionts in aphids can be disadvantageous for parasitoids, it is hypothesized that these insects have developed strategies to adjust their responses to the presence of these bacteria. In this study, experiments were conducted to determine whether the presence of the facultative symbiont Serratia symbiotica in the pea aphid Acyrtosiphum pisum affects the development and the life-history traits of the generalist parasitoid Aphidius ervi (Hymenoptera: Braconidae). Behavioral assays were also performed to determine whether the infection status of host aphids influences the foraging behavior of the parasitoids. It was showed that the presence of S. symbiotica had negative effects on the development and the life-history traits of emerging parasitoids. It was found that parasitoids preferentially orient themselves to uninfected aphid hosts, probably through chemical clues, and that they adjust their foraging behavior by investing more time in patches composed of uninfected aphid hosts. In light of these results, it is assumed that the presence of S. symbiotica alters host aphid quality, which in turn influences the choice of the female parasitoids for oviposition as well as the quality of the emerging parasitoids. This study highlights the ability of parasitoid wasps to modify their perception and behavior towards aphids infected with facultative symbionts and how these microorganisms interfere with host-parasite relationships.
Disciplines :
Entomology & pest control
Author, co-author :
Attia, Sabrine; Earth and Life Institute, Biodiversity Research Centre, UCLouvain, Louvain-la-Neuve, Belgium ; Laboratory of Bio aggressors and Integrated Pest Management in Agriculture, National Agronomic Institute of Tunisia (INAT) – University of Carthage, Tunis, Tunisia
Renoz, François; Earth and Life Institute, Biodiversity Research Centre, UCLouvain, Louvain-la-Neuve, Belgium
Pons, Inès; Earth and Life Institute, Biodiversity Research Centre, UCLouvain, Louvain-la-Neuve, Belgium
Louâpre, Philippe; CNRS, Biogéosciences UMR 6282, Université Bourgogne Franche-Comté, Dijon, France
Foray, Vincent; CNRS, Institut de Recherche sur la Biologie de l’Insecte UMR 7261, Université de Tours, Tours, France
Piedra, José-Mateo; Earth and Life Institute, Biodiversity Research Centre, UCLouvain, Louvain-la-Neuve, Belgium
Sanané, Inoussa; Earth and Life Institute, Biodiversity Research Centre, UCLouvain, Louvain-la-Neuve, Belgium
Le Goff, Guillaume; Earth and Life Institute, Biodiversity Research Centre, UCLouvain, Louvain-la-Neuve, Belgium
Lognay, Georges ; Université de Liège - ULiège > Département des sciences et gestion de l'environnement (Arlon Campus Environnement) > Surveillance de l'environnement
Hance, Thierry; Earth and Life Institute, Biodiversity Research Centre, UCLouvain, Louvain-la-Neuve, Belgium
Language :
English
Title :
The aphid facultative symbiont Serratia symbiotica influences the foraging behaviors and the life-history traits of the parasitoid Aphidius ervi
Publication date :
2022
Journal title :
Entomologia Generalis
ISSN :
0171-8177
eISSN :
2363-7102
Publisher :
Schweizerbart Science Publishers
Volume :
42
Issue :
1
Pages :
21 - 33
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
We are very grateful to Prof. Nancy Moran for providing aphid clones and to Prof. Stephen Foster for his comments on the research. This work was supported by a WallonieBruxelles International (WBI) grant. This is publication BRC 270 of the Biodiversity Research Centre at UCLouvain.Acknowledgments: We are very grateful to Prof. Nancy Moran for providing aphid clones and to Prof. Stephen Foster for his comments on the research. This work was supported by a Wallonie-Bruxelles International (WBI) grant. This is publication BRC 270 of the Biodiversity Research Centre at UCLouvain.
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