| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Influence of CH4 and H2S availability on symbiont distribution, carbon assimilation and transfer in the dual symbiotic vent mussel Bathymodiolus azoricus
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| Autores: |
Riou, V.
Halary, S.
Duperron, S.
Bouillon, S.
Elskens, M.
Bettencourt, R.
Santos, R. S.
Dehairs, F.
Colaco, A.
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| Data: |
2008-12-11
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| Ano: |
2008
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| Palavras-chave: |
Mid-atlantic ridge
Hydrocarbon-seep mussel
Deep-sea mussels
Hydrothermal-vent
Puteoserpentis bivalvia
Mytilidae
Methane
Endosymbionts
Bacteria
Metabolism
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| Resumo: |
High densities of mussels of the genus Bathymodiolus are present at hydrothermal vents of the Mid-Atlantic Ridge. It was previously proposed that the chemistry at vent sites would affect their sulphide- and methane-oxidizing endosymbionts' abundance. In this study, we confirmed the latter assumption using fluorescence in situ hybridization on Bathymodiolus azoricus specimens maintained in a controlled laboratory environment at atmospheric pressure with one, both or none of the chemical substrates. A high level of symbiosis plasticity was observed, methane-oxidizers occupying between 4 and 39% of total bacterial area and both symbionts developing according to the presence or absence of their substrates. Using (HCO3-)-C-13 in the presence of sulphide, or (CH4)-C-13, we monitored carbon assimilation by the endosymbionts and its translocation to symbiont-free mussel tissues. Carbon was incorporated from methane and sulphide- oxidized inorganic carbon at rates 3 to 10 times slower in the host muscle tissue than in the symbiont-containing gill tissue. Both symbionts thus contribute actively to B. azoricus nutrition and adapt to the availability of their substrates. Further experiments with varying substrate concentrations using the same set-up should provide useful tools to study and even model the effects of changes in hydrothermal fluids on B. azoricus' chemosynthetic nutrition.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00207/31865/30271.pdf
DOI:10.5194/bg-5-1681-2008
https://archimer.ifremer.fr/doc/00207/31865/
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| Editor: |
Copernicus Gesellschaft Mbh
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| Formato: |
application/pdf
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| Fonte: |
Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2008-12-11 , Vol. 5 , N. 6 , P. 1681-1691
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| Direitos: |
Author(s) 2008. This work is distributed under the Creative Commons Attribution 3.0 License.
info:eu-repo/semantics/openAccess
restricted use
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