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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
Resumen
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.
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.
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