Unrelated facultative endosymbionts protect aphids against a fungal pathogen

文献类型： 外文期刊

第一作者： Lukasik, Piotr

作者： Lukasik, Piotr;van Asch, Margriet;Guo, Huifang;Ferrari, Julia;Godfray, H. Charles J.;Guo, Huifang;Ferrari, Julia;Lukasik, Piotr

作者机构：

关键词： Acyrthosiphon pisum;Endosymbiosis;Hamiltonella defensa;Inclusive fitness;Pandora neoaphidis;Resistance;Secondary symbiont

期刊名称：ECOLOGY LETTERS （ 影响因子：9.492； 五年影响因子：11.721 ）

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收录情况： SCI

摘要： The importance of microbial facultative endosymbionts to insects is increasingly being recognized, but our understanding of how the fitness effects of infection are distributed across symbiont taxa is limited. In the pea aphid, some of the seven known species of facultative symbionts influence their host's resistance to natural enemies, including parasitoid wasps and a pathogenic fungus. Here we show that protection against this entomopathogen, Pandora neoaphidis, can be conferred by strains of four distantly related symbionts (in the genera Regiella, Rickettsia, Rickettsiella and Spiroplasma). They reduce mortality and also decrease fungal sporulation on dead aphids which may help protect nearby genetically identical insects. Pea aphids thus obtain protection from natural enemies through association with a wider range of microbial associates than has previously been thought. Providing resistance against natural enemies appears to be a particularly common way for facultative endosymbionts to increase in frequency within host populations.

分类号： Q1

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