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Pruebas de un módulo regulador SNAC1-ASMT1 sensible a la JA que contribuye a la tolerancia al estrés por salinidad

Roohollah Shamloo-Dashtpagerdi¹, Hadi Pirasteh-Anoshe², Sirous Tahmasebi³

¹Department of Agriculture and Natural Resources, Higher Education Center of Eghlid, Eghlid, Iran.

Journal of plant physiology

|August 28, 2025

Resumen

La señalización del ácido jasmónico (JA) mejora la biosíntesis de melatonina en la cebada bajo estrés de salinidad, potencialmente a través de la vía SNAC1-ASMT1, mejorando la tolerancia al estrés de la planta.

Área de la Ciencia:

Biología vegetal
Biología molecular
La bioquímica

Sus antecedentes:

La melatonina es vital para las respuestas abióticas de las plantas, pero su regulación en la cebada bajo salinidad no está clara.
Comprender la regulación de la biosíntesis de la melatonina es clave para mejorar la tolerancia al estrés de los cultivos.

Objetivo del estudio:

Investigar los mecanismos de regulación aguas arriba del gen de la biosíntesis de la melatonina ASMT1 en la cebada bajo salinidad.
Explorar la conexión entre la señalización del ácido jasmónico (JA) y la producción de melatonina.

Principales métodos:

Análisis del promotor del gen ASMT1.
Análisis transcriptómico de SNAC1 y ASMT1.
Experimentos controlados de invernadero con JA, DIECA y tratamientos de salinidad.
Medición de la expresión génica, los niveles de melatonina y la actividad de las enzimas antioxidantes.

Principales resultados:

El tratamiento con JA aumentó significativamente la expresión de SNAC1 y ASMT1 y aumentó los niveles de melatonina.
La aplicación de JA mitigó el daño oxidativo inducido por la salinidad y la disminución de la fotosíntesis.
La inhibición de la biosíntesis de JA atenuó estos efectos protectores.
Se observó una correlación significativa entre la expresión génica y el contenido de melatonina.

Conclusiones:

La señalización de JA probablemente contribuye a la biosíntesis de melatonina inducida por la salinidad en la cebada, potencialmente a través de la vía SNAC1-ASMT1.
Este estudio proporciona información sobre la regulación de la melatonina mediada por la hormona durante el estrés.
Los resultados ofrecen una base para futuras investigaciones sobre la mejora de la tolerancia al estrés de la cebada.

Palabras clave:

Tolerancia al estrés abiótico Hordeum vulgare L. Se encuentra en el extremo sur de Europa.La señalización hormonal Biosíntesis de la melatonina Regulación de las transcripciones

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