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El pigmento animal bilirrubina descubierto en las plantas
Cary Pirone1, J Martin E Quirke, Horacio A Priestap
1Department of Biological Sciences, Florida International University, Miami, Florida 33199, USA. cary.pirone@fiu.edu
Journal of the American Chemical Society
|February 12, 2009
Resumen
Los científicos descubrieron la bilirrubina, un pigmento biliar, en las plantas por primera vez. Este hallazgo en el pájaro blanco del árbol del paraíso sugiere una nueva vía de degradación de las plantas para los tetrapirroles cíclicos.
Área de la Ciencia:
- Bioquímica de las plantas bioquímica de las plantas.
- Metabolismo del pigmento animal el metabolismo del pigmento animal.
Sus antecedentes:
- La bilirrubina-IXalfa es un producto de degradación del hemo que se encuentra en los vertebrados, responsable de la coloración amarilla en la ictericia y los moretones.
- Su presencia en plantas no estaba previamente documentada.
Objetivo del estudio:
- Informar sobre el primer aislamiento y caracterización de la bilirrubina en las plantas.
- Investigar la presencia de bilirrubina en especies y tejidos vegetales relacionados.
Principales métodos:
- El aislamiento de la bilirrubina de Strelitzia nicolai arils.
- Caracterización mediante la cromatografía líquida de alto rendimiento y la espectrometría de masas de ionización por electrospray (HPLC-ESMS), la espectroscopia UV visible y la espectroscopia de resonancia magnética nuclear (RMN) ((1) H y (13) C).
- Comparación con un estándar de bilirrubina auténtico.
Principales resultados:
- La bilirrubina-IXalfa fue aislada e identificada con éxito en los arilos de Strelitzia nicolai.
- Los análisis espectroscópicos y cromatográficos confirmaron la identidad del compuesto aislado.
- Los análisis preliminares detectaron bilirrubina en los arilos y flores de especies relacionadas, incluida Strelitzia reginae.
Conclusiones:
- Este estudio presenta la primera evidencia de la aparición de bilirrubina en el reino vegetal.
- El descubrimiento sugiere una nueva vía para la degradación de los tetrapirroles cíclicos vegetales.
- La presencia de la bilirrubina no se limita a una sola especie de planta o tipo de tejido.
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