| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Effect of variation of environmental conditions on the microbial communities of deep-sea vent chimneys, cultured in a bioreactor
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| Autores: |
Byrne, Nathalie
Lesongeur, Francoise
Bienvenu, Nadege
Geslin, Claire
Alain, Karine
Prieur, Daniel
Godfroy, Anne
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| Data: |
2009-07
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| Ano: |
2009
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| Palavras-chave: |
16S rRNA genes
Oligotrophic condition
Environmental condition
Bioreactor
Continuous enrichment culture
Microbial diversity
Deep sea hydrothermal vent
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| Resumo: |
Both cultivation and molecular techniques were used to investigate the microbial diversity and dynamic of a deep-sea vent chimney. The enrichment cultures performed in a gas-lift bioreactor were inoculated with a black smoker chimney sample collected on TAG site on the mid-Atlantic ridge. To mimic as close as possible environmental conditions, the cultures were performed in oligotrophic medium with nitrogen, hydrogen and carbon dioxide (N-2/H-2/CO2) gas sweeping. Also, the temperature was first settled at a temperature of 85A degrees C and colloidal sulphur was added. Then, the temperature was lowered to 60A degrees C and sulphur was omitted. Archaeal and bacterial diversity was studied in both culture and natural samples. Through 16S rRNA gene sequences analysis of the enrichment cultures microorganisms affiliated to Archeoglobales, Thermococcales were detected in both conditions while, Deferribacterales and Thermales were detected only at 65A degrees C in the absence of sulphur. Single-stranded conformational polymorphism and quantitative PCR permit to study the microbial community dynamic during the two enrichment cultures. The effect of environmental changes (modification of culture conditions), i.e. temperature, medium composition, electron donors and acceptors availability were shown to affect the microbial community in culture, as this would happen in their environment. The effect of environmental changes, i.e. temperature and medium composition was shown to affect the microbial community in culture, as this could happen in their environment. The modification of culture conditions, such as temperature, organic matter concentration, electron donors and acceptors availability allowed to enrich different population of prokaryotes inhabiting hydrothermal chimneys.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/2009/publication-6920.pdf
DOI:10.1007/s00792-009-0242-6
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| Editor: |
Springer
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| Relação: |
http://archimer.ifremer.fr/doc/00000/6920/
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| Formato: |
application/pdf
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| Fonte: |
Extremophiles (1431-0651) (Springer), 2009-07 , Vol. 13 , N. 4 , P. 595-608
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| Direitos: |
2009 Springer
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