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Maintaining Biological Cultures and Measuring Gene Expression in Aphis nerii: A Non-model System for Plant-insect Interactions
Published on: August 31, 2018
Symbiont infection affects aphid defensive behaviours
Emilie Dion1, Sarah Erika Polin, Jean-Christophe Simon
1UMR 1099 INRA-Agrocampus Ouest-Université Rennes 1 Biologie des Organismes et des Populations appliquée à la Protection des Plantes, 65 rue de Saint-Brieuc CS 84215, 35042, Rennes Cedex, France.
Bacterial symbionts in aphids can alter host behavior, reducing defensive actions against enemies. This benefits both the aphid and the symbiont by lowering fitness costs associated with defense.
Area of Science:
- * Insect-microbe interactions
- * Behavioral ecology
- * Evolutionary biology
Background:
- * Aphids host obligate (Buchnera aphidicola) and facultative bacterial symbionts.
- * Facultative symbionts can modify aphid traits, potentially influencing their spread.
- * Aphid defensive behaviors against natural enemies incur reproductive costs.
Purpose of the Study:
- * To investigate if bacterial symbionts can modify aphid behavior to enhance transmission.
- * To examine the impact of the facultative symbiont Hamiltonella defensa on aphid anti-parasitoid behaviors.
Main Methods:
- * Experimental analysis of aphid behavior in the presence of parasitoids.
- * Comparison of behavioral responses between aphids infected with H. defensa and uninfected aphids.
Main Results:
- * Aphids infected with H. defensa displayed reduced aggressiveness and escape reactions towards parasitoids.
- * These behavioral modifications benefited both the aphid host and the H. defensa symbiont.
- * Reduced fitness costs associated with defensive behaviors were observed in infected aphids.
Conclusions:
- * Facultative symbionts can induce behavioral changes in aphids that reduce fitness costs of defense.
- * Symbiont-mediated behavioral modifications may impact coevolutionary dynamics between aphids and their enemies.
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