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Laboratory Simulation of an Iron(II)-rich Precambrian Marine Upwelling System to Explore the Growth of Photosynthetic Bacteria
Published on: July 24, 2016
Potencial para la quimiolitoautotropía entre los linajes de bacterias ubicuas en el océano oscuro
Brandon K Swan1, Manuel Martinez-Garcia, Christina M Preston
1Bigelow Laboratory for Ocean Sciences, 180 McKown Point Road, Post Office Box 475, West Boothbay Harbor, ME 04575, USA.
Science (New York, N.Y.)
|September 3, 2011
Resumen
Microbios oceánicos no identificados fijan el carbono inorgánico, impactando el ciclo global del carbono. Este estudio identifica grupos bacterianos específicos, como el SAR324, involucrados en este proceso crucial en el océano oscuro.
Área de la Ciencia:
- Microbiología marina microbiología marina.
- Los ciclos biogeoquímicos son ciclos biogeoquímicos.
- Oceanografía La oceanografía es la oceanografía.
Sus antecedentes:
- Los procariotas no identificados contribuyen significativamente a la fijación de carbono en el océano oscuro.
- Comprender estos microbios es clave para comprender el ciclo global del carbono.
Objetivo del estudio:
- Para identificar linajes procariotas involucrados en la fijación de carbono inorgánico en el océano oscuro.
- Investigar las capacidades metabólicas y las funciones ecológicas de estos microbios.
Principales métodos:
- Clasificación de células individuales y amplificación de todo el genoma.
- Perfiles genómicos y transcriptómicos.
- Microautoradiografía y fluorescencia en hibridación in situ.
Principales resultados:
- El análisis genómico reveló genes clave de fijación de carbono y oxidación de azufre en Deltaproteobacteria (SAR324), Gammaproteobacteria y Oceanospirillales.
- Los genomas de SAR324 indicaron un metabolismo C. y un estilo de vida asociado a las partículas.
- Los métodos experimentales confirmaron la absorción de bicarbonato y la asociación de partículas en SAR324.
Conclusiones:
- Varios linajes ubicuos y no cultivados de Proteobacteria exhiben un potencial de quimiolitoautotropía.
- Estos hallazgos ofrecen nuevos conocimientos sobre el ciclo del carbono oceánico dentro del hábitat marino más grande.
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