UMR 9220 ENTROPIE, UR-IRD-CNRS-UNC-IFREMER, Université de La Réunion, 15 Avenue René Cassin, CS 92003, 97744, Saint-Denis Cedex, La Réunion, France.
PSL Research University: EPHE-UPVD-CNRS, USR 3278 CRIOBE, Université de Perpignan, 52 Avenue Paul Alduy, 66860, Perpignan, France.
Nat Commun. 2021 Nov 4;12(1):6402. doi: 10.1038/s41467-021-26543-x.
Coral microbiomes are critical to holobiont functioning, but much remains to be understood about how prevailing environment and host genotype affect microbial communities in ecosystems. Resembling human identical twin studies, we examined bacterial community differences of naturally occurring fire coral clones within and between contrasting reef habitats to assess the relative contribution of host genotype and environment to microbiome structure. Bacterial community composition of coral clones differed between reef habitats, highlighting the contribution of the environment. Similarly, but to a lesser extent, microbiomes varied across different genotypes in identical habitats, denoting the influence of host genotype. Predictions of genomic function based on taxonomic profiles suggest that environmentally determined taxa supported a functional restructuring of the microbial metabolic network. In contrast, bacteria determined by host genotype seemed to be functionally redundant. Our study suggests microbiome flexibility as a mechanism of environmental adaptation with association of different bacterial taxa partially dependent on host genotype.
珊瑚微生物组对整个共生体的功能至关重要，但对于环境和宿主基因型如何影响生态系统中的微生物群落，仍有许多需要了解。我们通过研究自然发生的火珊瑚克隆体在不同珊瑚礁栖息地内和之间的细菌群落差异，类似于人类同卵双胞胎研究，以评估宿主基因型和环境对微生物组结构的相对贡献。珊瑚克隆体的细菌群落组成在不同的珊瑚礁栖息地之间存在差异，这突出了环境的作用。同样，在相同的栖息地中，不同基因型的微生物组也存在差异，但程度较小，这表明宿主基因型的影响。基于分类群的预测基因组功能表明，由环境决定的分类群支持微生物代谢网络的功能重构。相比之下，由宿主基因型决定的细菌似乎在功能上是冗余的。我们的研究表明，微生物组的灵活性是一种环境适应机制，不同的细菌分类群与宿主基因型存在关联，部分取决于宿主基因型。
