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  Dual symbiosis in a Bathymodiolus sp mussel from a methane seep on the gabon continental margin (southeast Atlantic): 16S rRNA phylogeny and distribution of the symbionts in gills

Duperron, S., Nadalig, T., Caprais, J. C., Sibuet, M., Fiala-Medioni, A., Amann, R., et al. (2005). Dual symbiosis in a Bathymodiolus sp mussel from a methane seep on the gabon continental margin (southeast Atlantic): 16S rRNA phylogeny and distribution of the symbionts in gills. Applied and Environmental Microbiology, 71(4), 1694-1700.

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 Creators:
Duperron, S.1, Author           
Nadalig, T., Author
Caprais, J. C., Author
Sibuet, M., Author
Fiala-Medioni, A., Author
Amann, R.2, Author           
Dubilier, N.3, Author           
Affiliations:
1Microbial Habitat Group, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481709              
2Department of Molecular Ecology, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481696              
3Department of Symbiosis, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481699              

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 Abstract: Deep-sea mussels of the genus Bathymodiolus (Bivalvia: Mytilidae) harbor symbiotic bacteria in their gills and are among the dominant invertebrate species at cold seeps and hydrothermal vents. An undescribed Bathymodiolus species was collected at a depth of 3,150 m in a newly discovered cold seep area on the southeast Atlantic margin, close to the Zaire channel. Transmission electron microscopy, comparative 16S rRNA analysis, and fluorescence in situ hybridization indicated that this Bathymodiolus sp. lives in a dual symbiosis with sulfide- and methane-oxidizing bacteria. A distinct distribution pattern of the symbiotic bacteria in the gill epithelium was observed, with the thiotrophic symbiont dominating the apical region and the methanotrophic symbiont more abundant in the basal region of the bacteriocytes. No variations in this distribution pattern or in the relative abundances of the two symbionts were observed in mussels collected from three different mussel beds with methane concentrations ranging from 0.7 to 33.7 microM. The 16S rRNA sequence of the methanotrophic symbiont is most closely related to those of known methanotrophic symbionts from other bathymodiolid mussels. Surprisingly, the thiotrophic Bathymodiolus sp. 16S rRNA sequence does not fall into the monophyletic group of sequences from thiotrophic symbionts of all other Bathymodiolus hosts. While these mussel species all come from vents, this study describes the first thiotrophic sequence from a seep mussel and shows that it is most closely related (99% sequence identity) to an environmental clone sequence obtained from a hydrothermal plume near Japan.

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Language(s): eng - English
 Dates: 2005-04
 Publication Status: Issued
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 250504
ISI: 000228338000003
 Degree: -

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Title: Applied and Environmental Microbiology
  Other : Appl. Environ. Microbiol.
Source Genre: Journal
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Publ. Info: American Society for Microbiology (ASM)
Pages: - Volume / Issue: 71 (4) Sequence Number: - Start / End Page: 1694 - 1700 Identifier: ISSN: 0099-2240
CoNE: https://pure.mpg.de/cone/journals/resource/954927519600