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Los virus SAR11 son abundantes en el océano
Yanlin Zhao1, Ben Temperton, J Cameron Thrash
1Department of Microbiology, Oregon State University, Corvallis, Oregon 97331, USA.
Nature
|February 15, 2013
Resumen
Los investigadores descubrieron pelagifagos, virus que infectan a las bacterias SAR11, refutando las teorías de la inmunidad SAR11. Este hallazgo sugiere SAR11.
Área de la Ciencia:
- Microbiología marina microbiología marina.
- Virología Virología.
- Oceanografía La oceanografía es la oceanografía.
Sus antecedentes:
- El clado bacteriano SAR11 domina los ecosistemas oceánicos, y su éxito se atribuía previamente a la resistencia de los fagos o al metabolismo eficiente.
- La depredación de arriba hacia abajo por los virus se consideró un factor menor en la dinámica de la población SAR11.
Objetivo del estudio:
- Para investigar el papel de la depredación viral en las bacterias SAR11.
- Para aislar y caracterizar los virus que infectan las bacterias SAR11.
Principales métodos:
- Aislamiento de virus que infectan el SAR11 en cultivo.
- Análisis genómico de virus aislados.
- Análisis de los datos metagenómicos virales marinos.
Principales resultados:
- Aislamiento de diversos virus SAR11, llamados pelagifagos, de dos familias de virus.
- Los genomas de los pelagifagos son abundantes en los metagenomas virales marinos.
- Se identificó una nueva subfamilia de podovirus altamente abundante (HTVC010P), lo que indica una importante depredación viral en SAR11.
Conclusiones:
- Las bacterias SAR11 son susceptibles a la depredación viral, desafiando las hipótesis anteriores.
- El éxito ecológico de SAR11 se debe probablemente a las adaptaciones en la competencia de recursos en lugar de la inmunidad viral.
- Los pelagifagos juegan un papel importante en los ecosistemas microbianos marinos y en el ciclo biogeoquímico.
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