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La cascada de señalización del péptido TaCEP15 modula la longitud de la raíz primaria y la tolerancia a la sequía en

Wen Yang¹, Renhan Li¹, Man Feng¹

¹China Agricultural University, Beijing 100193, China.

Science advances

|September 3, 2025

Resumen

El trigo

Área de la Ciencia:

Biología vegetal
Biología molecular
La genética

Sus antecedentes:

Pequeños péptidos de señalización regulan las respuestas al estrés de las plantas.
El estrés por sequía tiene un impacto significativo en el rendimiento de los cultivos a nivel mundial.

Objetivo del estudio:

Investigar el papel de TaCEP15 y TaCEPRL en la tolerancia a la sequía del trigo.
Elucidar los mecanismos moleculares subyacentes al crecimiento de las raíces y la regulación de la respuesta al estrés.

Principales métodos:

Nocaut genético y sobreexpresión en el trigo.
Ensayos de interacción y fosforilación de proteínas.
Análisis de la longitud de las raíces primarias y tolerancia a la sequía.

Principales resultados:

El knockout de TaCEP15 y TaCEPRL mejora la longitud de la raíz primaria y la tolerancia a la sequía.
TaCEPRL fosforila y degrada TaSnRK1α, un proceso intensificado por TaCEP15.
La sobreexpresión de TaSnRK1α mejora el alargamiento de las raíces y la tolerancia a la sequía.
El factor de transcripción TabZIP9 reprime la expresión de TaCEP15, afectando los fenotipos de raíz y sequía.

Conclusiones:

La vía de señalización TaCEP15-TaCEPRL es crítica para regular el crecimiento de la raíz primaria del trigo.
Esta vía juega un papel clave en la mejora de la tolerancia a la sequía.
Comprender este mecanismo de señalización de péptidos ofrece el potencial para mejorar la resiliencia de los cultivos.

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