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首页> 美国卫生研究院文献>other >Structure dynamics and predicted functional role of the gut microbiota of the blue (Haliotis fulgens) and yellow (H. corrugata) abalone from Baja California Sur Mexico
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Structure dynamics and predicted functional role of the gut microbiota of the blue (Haliotis fulgens) and yellow (H. corrugata) abalone from Baja California Sur Mexico

机译：墨西哥下加利福尼亚州的蓝色（Haliotis fulgens）和黄色（H.corrugata）鲍鱼肠道菌群的结构动力学和预测的功能

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The GI microbiota of abalone contains a highly complex bacterial assemblage playing an essential role in the overall health of these gastropods. The gut bacterial communities of abalone species characterized so far reveal considerable interspecific variability, likely resulting from bacterial interactions and constrained by the ecology of their abalone host species; however, they remain poorly investigated. Additionally, the extent to which structural changes in the microbiota entail functional shifts in metabolic pathways of bacterial communities remains unexplored. In order to address these questions, we characterized the gut microbiota of the northeast Pacific blue (Haliotis fulgens or HF) and yellow (Haliotis corrugata or HC) abalone by 16S rRNA gene pyrosequencing to shed light on: (i) their gut microbiota structure; (ii) how bacteria may interact among them; and (iii) predicted shifts in bacterial metabolic functions associated with the observed structural changes. Our findings revealed that Mycoplasma dominated the GI microbiome in both species. However, the structure of the bacterial communities differed significantly in spite of considerable intraspecific variation. This resulted from changes in predominant species composition in each GI microbiota, suggesting host-specific adaptation of bacterial lineages to these sympatric abalone. We hypothesize that the presence of exclusive OTUs in each microbiota may relate to host-specific differences in competitive pressure. Significant differences in bacterial diversity were found between species for the explored metabolic pathways despite their functional overlap. A more diverse array of bacteria contributed to each function in HC, whereas a single or much fewer OTUs were generally observed in HF. The structural and functional analyses allowed us to describe a significant taxonomic split and functional overlap between the microbiota of HF and HC abalone.
机译：鲍鱼的胃肠菌群含有高度复杂的细菌，在这些腹足动物的整体健康中起着至关重要的作用。到目前为止，鲍鱼物种的肠道细菌群落表现出相当大的种间变异性，这很可能是由于细菌相互作用所致，并受到其鲍鱼宿主物种生态学的限制；但是，他们仍然缺乏调查。此外，微生物群落结构变化引起细菌群落代谢途径功能改变的程度尚待探索。为了解决这些问题，我们通过16S rRNA基因焦磷酸测序来表征东北太平洋蓝（鲍鱼（Haliotis fulgens或HF））和黄鲍鱼（Haliotis corrugata或HC）的肠道菌群，以阐明：（i）它们的肠道菌群结构； （ii）细菌之间如何相互作用？ （iii）与观察到的结构变化有关的细菌代谢功能的预测变化。我们的发现表明，支原体在这两个物种中均占主导地位。然而，尽管种内有相当大的差异，细菌群落的结构仍显着不同。这是由于每个胃肠道微生物群落中主要物种组成的变化所致，表明细菌谱系对这些同胞鲍鱼具有宿主特异性适应性。我们假设每个微生物区系中专属OTU的存在可能与竞争压力中特定于宿主的差异有关。尽管它们的功能重叠，但在探索的代谢途径的物种之间发现了细菌多样性的显着差异。 HC中每种功能的细菌种类更多，而在HF中通常观察到一个或更少的OTU。结构和功能分析使我们能够描述HF和HC鲍鱼菌群之间的重大分类学分裂和功能重叠。

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