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El módulo de receptor quinasa se dirige al transporte de auxinas dependiente de PIN durante la canalización
Jakub Hajný1,2, Tomáš Prát1, Nikola Rydza3
1Institute of Science and Technology (IST), 3400 Klosterneuburg, Austria.
Science (New York, N.Y.)
|October 30, 2020
Resumen
Los investigadores identificaron CAMEL y CANAR, receptores cruciales que regulan el transporte de las auxinas. Estos hallazgos arrojan luz sobre el desarrollo de las plantas, específicamente la regeneración de la vasculatura y los patrones de venación de las hojas.
Área de la Ciencia:
- Biología vegetal
- Biología molecular
- Biología del desarrollo
Sus antecedentes:
- Los canales de transporte de auxinas guían el desarrollo de las plantas, influyendo en la regeneración vascular y la venación de las hojas.
- La hipótesis de la canalización de la auxina sugiere un bucle de retroalimentación entre la señalización y el transporte de la auxina, pero los componentes moleculares clave siguen siendo desconocidos.
Objetivo del estudio:
- Para identificar la maquinaria molecular responsable de la ruta del transporte de las auxinas.
- Aclarar el papel de los nuevos receptores en la canalización de las auxinas y el desarrollo de las plantas.
Principales métodos:
- Análisis genético de camellos y canarios mutantes.
- Investigación de la interacción y fosforilación de los transportadores de la auxina PIN por CAMEL y CANAR.
- Analizando el tráfico subcelular de PIN1 y la polarización de PIN mediada por auxinas.
Principales resultados:
- Se identificó a CAMEL (RLK de tipo malectina regulado por auxina relacionado con la canalización) y CANAR (quinasa similar al receptor relacionada con la canalización) como actores clave en el transporte de auxinas.
- CAMEL y CANAR interactúan con los transportadores de auxinas PIN y los fosforilan.
- Las mutaciones en el camello y el canario interrumpen el tráfico y la polarización de PIN1, lo que lleva a defectos en la venación de las hojas y la regeneración de la vasculatura.
Conclusiones:
- El complejo de receptores CAMEL-CANAR es parte integral del mecanismo de retroalimentación de la auxina que controla la polarización celular durante la canalización de la auxina.
- Estos hallazgos revelan nuevos actores moleculares esenciales para el desarrollo autoorganizado de las plantas.
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