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Comparingconstitutive andinduced costs ofsymbiont‐conferredresistance toparasitoids in aphids Christoph VorburgerPravin GanesanandamoorthyMarek Kwiatkowski2013 год

Comparing constitutive and induced costs of symbiont‐conferred resistance to parasitoids in aphids
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Полный текстСтраница публикацииПубликация в OpenAlex
Аннотация: Host defenses against parasites do not come for free. The evolution of increased resistance can be constrained by constitutive costs associated with possessing defense mechanisms, and by induced costs of deploying them. These two types of costs are typically considered with respect to resistance as a genetically determined trait, but they may also apply to resistance provided by 'helpers' such as bacterial endosymbionts. We investigated the costs of symbiont-conferred resistance in the black bean aphid, Aphis fabae (Scopoli), which receives strong protection against the parasitoid Lysiphlebus fabarum from the defensive endosymbiont Hamiltonella defensa. Aphids infected with H. defensa were almost ten times more resistant to L. fabarum than genetically identical aphids without this symbiont, but in the absence of parasitoids, they had strongly reduced lifespans, resulting in lower lifetime reproduction. This is evidence for a substantial constitutive cost of harboring H. defensa. We did not observe any induced cost of symbiont-conferred resistance. On the contrary, symbiont-protected aphids that resisted a parasitoid attack enjoyed increased longevity and lifetime reproduction compared with unattacked controls, whereas unprotected aphids suffered a reduction of longevity and reproduction after resisting an attack. This surprising result suggests that by focusing exclusively on the protection, we might underestimate the selective advantage of infection with H. defensa in the presence of parasitoids.
Год издания: 2013
Авторы: Christoph Vorburger, Pravin Ganesanandamoorthy, Marek Kwiatkowski
Издательство: Wiley
Источник: Ecology and Evolution
Ключевые слова: Insect symbiosis and bacterial influences, Insect-Plant Interactions and Control, Plant and animal studies
Другие ссылки: Ecology and Evolution (HTML)
DOAJ (DOAJ: Directory of Open Access Journals) (HTML)
Europe PMC (PubMed Central) (PDF)
Europe PMC (PubMed Central) (HTML)
Repository for Publications and Research Data (ETH Zurich) (PDF)
Repository for Publications and Research Data (ETH Zurich) (HTML)
DORA Eawag (Swiss Federal Institute of Aquatic Science and Technology (Eawag)) (PDF)
DORA Eawag (Swiss Federal Institute of Aquatic Science and Technology (Eawag)) (HTML)
PubMed Central (HTML)
PubMed (HTML)