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Una visión molecular de la diversidad microbiana y la biosfera
1Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720-3102, USA. nrpace@nature.berkeley.edu
Science (New York, N.Y.)
|May 2, 1997
Resumen
La filogenética molecular revela la vida microbiana.
Área de la Ciencia:
- Biología evolutiva Biología evolutiva.
- Ecología microbiana ecología microbiana.
- Filogenética molecular y filogenética molecular.
Sus antecedentes:
- Los tres dominios de la vida: Archaea, Bacteria y Eucarya, representan los principales grupos de parentesco.
- La vida temprana probablemente utilizó la nutrición inorgánica, con la fotosíntesis y el metabolismo de los compuestos orgánicos evolucionando más tarde.
Objetivo del estudio:
- Trazar un mapa de la diversificación evolutiva de la vida utilizando la filogenética molecular.
- Explorar los ecosistemas microbianos y descubrir nuevos linajes evolutivos.
Principales métodos:
- Análisis molecular-filogenético durante tres décadas.
- Estudio de los ecosistemas microbianos naturales sin requisitos basados en el cultivo.
Principales resultados:
- Un robusto mapa evolutivo que resalta la diversidad microbiana.
- Descubrimiento de linajes evolutivos inesperados distantemente relacionados con organismos conocidos.
- Identificación de linajes abundantes que impactan en la química de la biosfera.
Conclusiones:
- La vida microbiana domina la diversidad de la Tierra.
- Los nuevos linajes microbianos juegan un papel importante en los ciclos biogeoquímicos.
- La filogenética molecular es crucial para comprender la evolución microbiana y la ecología.
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