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首页> 外文期刊>American Zoologist >Interaction of Drosophila and its endosymbiont Wolbachia: natural heat shock and the overcoming of sexual incompatibility.
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Interaction of Drosophila and its endosymbiont Wolbachia: natural heat shock and the overcoming of sexual incompatibility.

机译：果蝇及其内共生沃尔巴克菌的相互作用：自然热休克和克服性不相容性。

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摘要

Wolbachia, a bacterial endosymbiont of diverse arthropods, affects its host's reproduction and so is consequential for its host's fitness. In Drosophila simulans, Wolbachia increases embryonic mortality in crosses of infected males with uninfected females, possibly by manipulating the proteins of the host gametes. Preliminary data suggests these proteins include at least 2 families of heat-shock proteins, Hsp70 and Hsp90. Drosophila larvae live within necrotic fruit, in which larvae can experiencethermal stress that induces Hsp expression. Infected male D. simulans, if exposed to laboratory heat shock as larvae, father more viable offspring than unexposed controls. Also, infected male D. simulans, if allowed to copulate beforehand, father more viable offspring than virgin controls of identical age. These 2 mechanisms of restoring the reproductive compatibility of Wolbachia-infected Drosophila could affect the fitness of wild D. simulans; these effects were documented through modelling and experimental study of natural populations and their thermal environment. This research exemplified how evolutionary physiology may extend far beyond the classical disciplinary boundaries of physiology and evolutionary biology.
机译：沃尔巴氏菌是一种节肢动物的细菌内共生体，会影响宿主的繁殖，因此对宿主的适应性也有影响。在果蝇模拟动物中，沃尔巴克氏菌可能会通过操纵宿主配子的蛋白质来增加受感染雄性与未感染雌性杂交的胚胎死亡率。初步数据表明，这些蛋白质包括至少2个热休克蛋白质家族Hsp70和Hsp90。果蝇幼虫生活在坏死的果实中，其中的幼虫会经历热应激，诱导Hsp表达。被感染的雄性拟杆菌（D. simulans），如果以幼虫的形式暴露于实验室热休克中，其父亲的后代比未暴露的对照更能生存。同样，如果被感染的雄性D. simulans事先交配，其父亲的后代比相同年龄的原始对照更能存活。恢复Wolbachia感染的果蝇的这两种恢复生殖相容性的机制可能会影响野生拟似棒杆菌的适应性。通过对自然种群及其热环境的建模和实验研究，记录了这些影响。这项研究例证了进化生理学如何可能远远超出了生理学和进化生物学的经典学科界限。

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