Commensal bacteria play a role in mating preference of Drosophila melanogaster
Commensal bacteria play a role in mating preference of Drosophila melanogaster
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DOI：
10.1073/pnas.1009906107
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发表时间：
2010-11-16
影响因子：
11.1
通讯作者：
Rosenberg, Eugene
中科院分区：
文献类型：
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作者：
Sharon, Gil;Segal, Daniel;Rosenberg, Eugene
交配偏好的发展被认为是物种形成的早期事件。在这项研究中，交配偏好是通过划分种群的黑腹果蝇和饲养一部分在糖蜜培养基和淀粉培养基上的其他实现。当隔离种群混合时，“糖蜜蝇”更喜欢与其他糖蜜蝇交配，“淀粉蝇”更喜欢与其他淀粉蝇交配。交配偏好仅在一代后出现，并保持至少37代。抗生素治疗消除了交配偏好，这表明苍蝇微生物群是造成这种现象的原因。这通过用从苍蝇培养基（抗生素处理前）获得的微生物群以及用乳杆菌属物种的混合培养物和从淀粉苍蝇分离的植物乳杆菌的纯培养物进行的感染实验来证实。分析数据表明，共生细菌可以通过改变角质层碳氢化合物性信息素的水平来影响交配偏好。结果进行了讨论的框架内的进化的hologenome理论。
Development of mating preference is considered to be an early event in speciation. In this study, mating preference was achieved by dividing a population of Drosophila melanogaster and rearing one part on a molasses medium and the other on a starch medium. When the isolated populations were mixed, "molasses flies" preferred to mate with other molasses flies and "starch flies" preferred to mate with other starch flies. The mating preference appeared after only one generation and was maintained for at least 37 generations. Antibiotic treatment abolished mating preference, suggesting that the fly microbiota was responsible for the phenomenon. This was confirmed by infection experiments with microbiota obtained from the fly media (before antibiotic treatment) as well as with a mixed culture of Lactobacillus species and a pure culture of Lactobacillus plantarum isolated from starch flies. Analytical data suggest that symbiotic bacteria can influence mating preference by changing the levels of cuticular hydrocarbon sex pheromones. The results are discussed within the framework of the hologenome theory of evolution.