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Mitral Valve Prolapse III: Nursing Management
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La expresión génica en la biosfera profunda.

William D Orsi1, Virginia P Edgcomb, Glenn D Christman

  • 1Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA. william.orsi@gmail.com

Nature
|June 14, 2013
PubMed
Resumen
Este resumen es generado por máquina.

La biosfera profunda alberga vida microbiana crucial para los ciclos globales. Este estudio revela los procesos metabólicos anaerobios dominantes y la división celular en el sedimento del fondo submarino, ofreciendo una visión holística de este entorno.

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Área de la Ciencia:

  • Microbiología marina microbiología marina.
  • La geoquímica es la geoquímica.
  • Biología molecular La biología molecular.

Sus antecedentes:

  • La perforación científica del océano ha descubierto una vasta biosfera profunda dentro de los sedimentos del fondo submarino.
  • El metabolismo microbiano en el subsuelo marino juega un papel importante en los ciclos biogeoquímicos globales.
  • Sin embargo, las actividades específicas dentro de la biosfera profunda siguen siendo poco conocidas.

Objetivo del estudio:

  • Para analizar los primeros metatranscriptomas del subsuelo marino de los sedimentos anaeróbicos del margen del Perú.
  • Obtener una comprensión completa de los procesos y actividades metabólicas microbianas en la biosfera profunda.

Principales métodos:

  • El análisis de más de mil millones de secuencias de ADN complementario (ADNc) se lee a partir de muestras de sedimentos.
  • Análisis metatranscriptómico de la expresión génica microbiana hasta 159 metros bajo el fondo marino.

Principales resultados:

  • Los procesos metabólicos anaerobios dominantes identificados incluyen el metabolismo de aminoácidos, carbohidratos y lípidos.
  • Los perfiles de transcripción de la sulfito reductasa disimilatoria (dsr) se correlacionan con las concentraciones de sulfato de agua porosa.
  • Las transcripciones relacionadas con la división celular aumentan con la concentración de células microbianas en los tres dominios de la vida.

Conclusiones:

  • Los hallazgos proporcionan la primera imagen holística de las actividades de la biosfera profunda.
  • Los datos apoyan los modelos y cálculos existentes del metabolismo microbiano del subsuelo marino.
  • La abundancia de microbios en el subsuelo marino es impulsada por la división celular.