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FERONIA controla la interacción hombre-mujer mediada por el óxido nítrico y la pectina
Qiaohong Duan1,2, Ming-Che James Liu1,3, Daniel Kita1,4,5
1Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst, MA, USA.
Nature
|March 28, 2020
Resumen
La quinasa del receptor de FERONIA previene la polispermia en Arabidopsis mediante el control de la atracción por el tubo de polen. Mantiene las condiciones específicas de la pared celular y utiliza óxido nítrico para bloquear los quimioatractores después de que el primer espermatozoide fertilice el óvulo.
Área de la Ciencia:
- Reproducción de las plantas
- Señales celulares
- Biología molecular
Sus antecedentes:
- La reproducción sexual requiere la prevención de la polispermia.
- Las plantas con flores usan tubos de polen para la entrega de esperma.
- Se sabe que la FERONIA receptor quinasa ayuda a la liberación de esperma y bloquea la polispermia.
Objetivo del estudio:
- Para aclarar el mecanismo por el cual FERONIA previene la polispermia en Arabidopsis.
- Para entender cómo FERONIA controla el entorno gametofítico femenino para bloquear los tubos de polen supernumerarios.
Principales métodos:
- Se investigó el papel de FERONIA en el mantenimiento de la estructura de la pectina en el aparato filiforme.
- Se analizó la acumulación de óxido nítrico en el aparato filiforme a la llegada del tubo de polen.
- Se ha examinado el efecto del óxido nítrico sobre el quimioatractor LURE1.
Principales resultados:
- FERONIA es esencial para el mantenimiento de la pectina desesterificada en el aparato filiforme.
- La llegada del tubo de polen desencadena la acumulación de óxido nítrico dependiente de FERONIA.
- El óxido nítrico nitrosa LURE1, inhibiendo su secreción e interacción con los receptores, reduciendo así la atracción.
Conclusiones:
- FERONIA orquesta una respuesta posterior a la fecundación para prevenir la polispermia.
- La llegada del primer tubo de polen modifica el óvulo para dejar de atraer a otros.
- Este mecanismo asegura la fertilización única mediante la alteración de la señalización de los quimioatractores a través del óxido nítrico.
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