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Mediación de la especiación de azufre por un anaeroba facultativo del Mar Negro
Science (New York, N.Y.)
|February 5, 1993
Resumen
Shewanella putrefaciens reduce fácilmente varios compuestos de azufre a sulfuro, jugando un papel clave en el ciclo anaeróbico del azufre. Esta versátil bacteria es abundante en ambientes marinos y de agua dulce.
Área de la Ciencia:
- Microbiología Microbiología.
- Ciencias ambientales Ciencias ambientales.
- Biogeoquímica La biogeoquímica es la bioquímica.
Sus antecedentes:
- Shewanella putrefaciens es un anaerobio facultativo que se encuentra en el Mar Negro.
- Es conocido por su versatilidad respiratoria bajo condiciones anaerobias.
Objetivo del estudio:
- Para investigar las capacidades de reducción de compuestos de azufre de Shewanella putrefaciens.
- Para entender su papel en el ciclo del azufre en ambientes anaerobios.
Principales métodos:
- Aislamiento de Shewanella putrefaciens desde el Mar Negro.
- Probando su capacidad para reducir el tiosulfato, el sulfito y el azufre elemental a sulfuro.
- Evaluar su incapacidad para reducir el sulfato.
Principales resultados:
- Shewanella putrefaciens reduce cuantitativamente el tiosulfato, el sulfito y el azufre elemental a sulfuro.
- La bacteria utiliza estos intermediarios de azufre oxidado como aceptores de electrones.
- No se observó reducción de sulfato.
Conclusiones:
- Shewanella putrefaciens es un jugador importante en la transformación anaeróbica del azufre.
- Su abundancia sugiere un papel crucial en el ciclo del azufre y los metales traza en los ecosistemas marinos y de agua dulce.
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