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Se requiere un diálogo molecular bidireccional entre el embrión y el endospermo para el desarrollo de las semillas

N M Doll¹, S Royek², S Fujita³

¹Laboratoire Reproduction et Développement des Plantes, University of Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRAE, F-69342, Lyon, France.

Science (New York, N.Y.)

|January 25, 2020

Resumen

Un péptido sulfatado, TWISTED SEED1 (TWS1), actúa como un ligando GASSHO, reforzando la cutícula embrionaria de la planta. Este proceso implica una subtilasa del endosperma que señala al embrión, asegurando la supervivencia de las plántulas.

Área de la Ciencia:

Biología vegetal
Biología del desarrollo
Señales moleculares

Sus antecedentes:

La cutícula embrionaria de la planta es crucial para la supervivencia de las plántulas, previniendo la pérdida de agua durante la germinación.
La formación de las cutículas está regulada por una vía de señalización que involucra a las quinasas similares al receptor ABNORMAL LEAF SHAPE1 (ALS1) y GASSHO (GSO).

Objetivo del estudio:

Identificar el ligando de las quinasas similares al receptor GASSHO implicadas en la formación de la cutícula embrionaria.
Para aclarar el diálogo molecular entre el embrión y el endospermo en la regulación de la integridad de la cutícula.

Principales métodos:

Identificación de TWISTED SEED1 (TWS1) como un ligando de péptido sulfatado
Análisis de la localización y función de la subtilasa en el endospermo.
Investigar el procesamiento del precursor TWS1 y su efecto en la señalización GASSHO.

Principales resultados:

TWISTED SEED1 (TWS1) es un péptido sulfatado que funciona como un ligando GASSHO.
La subtilasa ALS1, necesaria para la activación de TWS1, se produce en el endospermo, no en el embrión.
La subtilasa derivada del endosperma procesa el precursor TWS1 derivado del embrión, desencadenando el refuerzo de la cutícula dependiente de GASSHO.

Conclusiones:

Un diálogo molecular bidireccional entre el embrión y el endospermo es esencial para salvaguardar la integridad de la cutícula embrionaria.
Esta vía de señalización asegura el desarrollo adecuado de la cutícula, crítico para la supervivencia de la planta después de la germinación.

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