AI Article Synopsis
- Sampling specific regions of the cnidarian Nematostella vectensis revealed unique bacterial communities, particularly a high presence of spirochetes in the capitulum.
- In the capitulum, spirochetes from the family Spirochaetaceae made up 66% of the bacterial community, whereas their presence in other regions, like mesenteries and physa, was minimal (1.2% and 0.1%, respectively).
- Phylogenetic analysis indicated that these spirochetes are closely related to those found in wild N. vectensis and belong to a recently described genus, Oceanispirochaeta, highlighting a significant but not fully understood relationship between the organism and its symbiotic bacteria
Article Abstract
Sampling of different body regions can reveal highly specialized bacterial associations within the holobiont and facilitate identification of core microbial symbionts that would otherwise be overlooked by bulk sampling methods. Here, we characterized compartment-specific associations present within the model cnidarian Nematostella vectensis by dividing its morphology into three distinct microhabitats. This sampling design allowed us to uncover a capitulum-specific dominance of spirochetes within N. vectensis. Bacteria from the family Spirochaetaceae made up 66% of the community in the capitulum, while only representing 1.2% and 0.1% of the communities in the mesenteries and physa, respectively. A phylogenetic analysis of the predominant spirochete sequence recovered from N. vectensis showed a close relation to spirochetes previously recovered from wild N. vectensis. These sequences clustered closer to the recently described genus Oceanispirochaeta, rather than Spirochaeta perfilievii, supporting them as members of this clade. This suggests a prevalent and yet uncharacterized association between N. vectensis and spirochetes from the order Spirochaetales.
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| http://dx.doi.org/10.1093/femsle/fnab002 | DOI Listing |
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