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Relojes circadianos en el control diario y estacional del desarrollo
Thomas F Schultz1, Steve A Kay
1Department of Cell Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
Science (New York, N.Y.)
|July 19, 2003
Resumen
Los organismos utilizan un reloj biológico interno diario, el reloj circadiano, para anticiparse a los cambios ambientales. Este reloj regula el desarrollo y las respuestas fotoperiódicas tanto en plantas como en animales al detectar la longitud del día.
Área de la Ciencia:
- * Cronobiología y biología del desarrollo.
- * Mecanismos moleculares de los ritmos biológicos.
Sus antecedentes:
- * La rotación de la Tierra causa ciclos predecibles de luz y oscuridad, que influyen en la vida.
- * Los organismos poseen osciladores biológicos internos, llamados relojes circadianos.
- * Los relojes circadianos regulan numerosos procesos fisiológicos.
Objetivo del estudio:
- * Revisar la comprensión actual de las funciones del reloj circadiano en el desarrollo.
- * Para resaltar las funciones conservadas de los relojes circadianos en plantas y animales.
- * Para explorar la participación del reloj circadiano en el fotoperiodismo.
Principales métodos:
- * Revisión de la literatura sobre la investigación del reloj circadiano.
- * Análisis de los mecanismos moleculares conservados en todas las especies.
- * Examen de las respuestas del desarrollo y fotoperiódicas.
Principales resultados:
- * Los relojes circadianos son cruciales para anticipar los cambios ambientales diarios.
- * Los procesos de desarrollo en plantas y animales están regulados por el reloj circadiano.
- * La detección de la longitud del día a través del reloj circadiano media las respuestas fotoperiódicas.
Conclusiones:
- * El reloj circadiano es un oscilador biológico fundamental.
- * Mecanismos conservados vinculan los relojes circadianos con el desarrollo en diversos organismos.
- * La regulación circadiana del fotoperiodismo es un rasgo compartido entre plantas y animales.
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