Wolbachia infection suppresses both host defence and parasitoid counter-defence
Wolbachia infection suppresses both host defence and parasitoid counter-defence
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DOI：
10.1098/rspb.2005.3383
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发表时间：
2006-04-07
影响因子：
4.7
通讯作者：
Hubbard, SF
中科院分区：
文献类型：
--
作者：
Fytrou, A;Schofield, PG;Hubbard, SF
沃尔巴克氏体属的内共生细菌与几种类型的生殖寄生有关，它们增强了自身的传播，而它们对宿主的直接影响从有益到中性或有害不等。在这里，我们报道了感染对拟果蝇和拟寄生蜂异瘤Leptopilina的免疫相关性状的负面影响。与四环素处理的无菌菌株相比，受感染的拟马鳖包封类寄生虫卵的能力降低。另一方面，用真菌病原体白僵菌（Beauveria bassiana）挑战这两个品系，结果显示存活率没有差异。此外，消除沃尔巴克氏体对拟寄生蜂是有益的，因为未感染的雌性产卵的包封率明显较低。我们讨论了这些适应性成本的可能起源及其对感染动力学和宿主物种之间相互作用的影响。
Endosymbiotic bacteria in the genus Wolbachia have been linked to several types of reproductive parasitism, which enhance their own transmission, while their direct effects on the host vary from beneficial to neutral or detrimental. Here, we report negative effects of infection on immunity-related traits of Drosophila simulans and the parasitoid wasp Leptopilina heterotoma. Infected D. simulans showed a reduced ability to encapsulate parasitoid eggs, compared to a tetracycline-treated, bacterium-free line. Challenging the two lines with a fungal pathogen, Beauveria bassiana, on the other hand, revealed no differences in survival. Moreover, elimination of Wolbachia was beneficial for the parasitoid wasp, as eggs laid by uninfected females suffered significantly lower encapsulation rates. We discuss possible origins of these fitness costs and their implications for infection dynamics and the interactions between host species.