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Una clorofila con desplazamiento al rojo.

Min Chen1, Martin Schliep, Robert D Willows

  • 1School of Biological Sciences, University of Sydney, NSW 2006, Australia. min.chen@sydney.edu.au

Science (New York, N.Y.)
|August 21, 2010
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores descubrieron la clorofila f, un nuevo pigmento que extiende la fotosíntesis en el espectro infrarrojo. Este quinto tipo de clorofila, [2-formil]-clorofila a, puede ofrecer nuevas posibilidades de bioenergía.

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Área de la Ciencia:

  • La bioquímica es la bioquímica.
  • Investigación de fotosíntesis Investigación de fotosíntesis.
  • Ciencias de las plantas Ciencias de las plantas.

Sus antecedentes:

  • Las clorofilas son pigmentos vitales para la recolección de luz en la fotosíntesis.
  • Cuatro tipos de clorofila han sido reconocidos durante seis décadas.
  • Los fototróficos oxigenados utilizan la clorofila para la transducción de energía.

Objetivo del estudio:

  • Informar sobre el aislamiento y la caracterización de un nuevo pigmento de clorofila.
  • Para determinar la estructura química de la recién descubierta clorofila.
  • Explorar las implicaciones de este hallazgo para la fotosíntesis y la bioenergía.

Principales métodos:

  • Aislamiento del nuevo pigmento de clorofila.
  • Análisis espectroscópico que incluye resonancia óptica, de masa y de resonancia magnética nuclear (RMN).
  • Elucidación de la estructura química basada en datos espectrales.

Principales resultados:

  • Se aisló una quinta clorofila, designada como clorofila f.
  • La clorofila f exhibe un máximo de absorción desplazada al rojo (706 nm) y fluorescencia (722 nm).
  • La estructura propuesta de la clorofila f es la [2-formil]-clorofila a (C55H70O6N4Mg).

Conclusiones:

  • La fotosíntesis oxigenada puede ocurrir más allá de la región infrarroja.
  • El descubrimiento de la clorofila f amplía nuestra comprensión de los pigmentos fotosintéticos.
  • De este hallazgo pueden surgir aplicaciones potenciales en bioenergía.