Worker-dependent gut symbiosis in an ant.
Worker-dependent gut symbiosis in an ant.
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DOI：
10.1038/s43705-021-00061-9
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发表时间：
2021-10-28
期刊：
影响因子：
--
通讯作者：
Doglioli, Andrea
中科院分区：
文献类型：
--
作者：
Benavides, Mar;Conradt, Louis;Bonnet, Sophie;Berman-Frank, Ilana;Barrillon, Stephanie;Petrenko, Anne;Doglioli, Andrea
群居昆虫、蜜蜂、蚂蚁和白蚁的特点是生殖工种和非生殖工种之间的分工。此外，环境适应和生态优势也是与有益微生物共生的基础。微生物共生体通常被认为以两种不同的方式维持在昆虫群体中：在所有群体成员之间共享或仅由特定的种姓遗传。特别是在蚂蚁中，生殖种姓在群体成员之间共享的共生体的世代传播中起着至关重要的作用。在这里，我们报告了一个例外情况，蚂蚁Diacamma cf中依赖工人的微生物区系。产自日本的印度种。通过采集田间22个菌落的几乎所有个体，我们揭示了工蚁微生物区系的特征是定位于后肠的单一优势细菌。在生殖种姓中稀有或几乎不存在的非分类成员的细菌。此外，我们还表明肠道共生体是在成虫阶段获得的。总之，我们的发现强烈表明，只有工人才能维持特定的共生体，展示了一种与蚂蚁相关的细菌共生的新模式，从而加深了我们从社会生物学的角度对宿主-微生物相互作用的理解。
The hallmark of eusocial insects, honeybees, ants, and termites, is division of labor between reproductive and non-reproductive worker castes. In addition, environmental adaption and ecological dominance are also underpinned by symbiotic associations with beneficial microorganisms. Microbial symbionts are generally considered to be maintained in an insect colony in two alternative ways: shared among all colony members or inherited only by a specific caste. Especially in ants, the reproductive caste plays a crucial role in transmission of the symbionts shared among colony members over generations. Here, we report an exceptional case, the worker-dependent microbiota in an ant, Diacamma cf. indicum from Japan. By collecting almost all the individuals from 22 colonies in the field, we revealed that microbiota of workers is characterized by a single dominant bacterium localized at the hindgut. The bacterium belonging to an unclassified member within the phylum Firmicutes, which is scarce or mostly absent in the reproductive castes. Furthermore, we show that the gut symbiont is acquired at the adult stage. Collectively, our findings strongly suggest that the specific symbiont is maintained by only workers, demonstrating a novel pattern of ant-associated bacterial symbiosis, and thus further our understanding of host-microbe interactions in the light of sociobiology.
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