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Una nueva familia de proteínas de función desconocida 707 coordina el crecimiento de las raíces y la tolerancia a la

Qi Yan^1,2, Yunyue Xiao^1,2, Xue Li^1,2

¹State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Lanzhou University, Lanzhou, 730020, China.

The Plant journal : for cell and molecular biology

|February 2, 2026

Resumen

Los investigadores identificaron genes clave, LpDUF707-1 y LpOBP3.1, que regulan el crecimiento de las raíces y la tolerancia a la sequía en plantas xerofíticas. Este descubrimiento ofrece objetivos para el desarrollo de cultivos con mayor resistencia a la sequía.

Área de la Ciencia:

Biología vegetal
Genética molecular
Fisiología del estrés por sequía

Sus antecedentes:

Los xerófitos se adaptan a la sequía a través del desarrollo del sistema radicular, pero los mecanismos moleculares subyacentes siguen sin estar claros.
La comprensión de estos mecanismos es crucial para mejorar la resiliencia de los cultivos en ambientes áridos.

Objetivo del estudio:

Identificar y caracterizar reguladores moleculares del crecimiento de las raíces y la tolerancia a la sequía en el subarbusto xerofítico Lespedeza potaninii.
Elucidar los roles de las proteínas DUF707 y los factores de transcripción asociados en la respuesta a la sequía.

Principales métodos:

Análisis de la expresión génica bajo tratamiento de sequía y ácido abscísico (ABA).
Ensayos de actividad promotora.
Sobrerregulación y silenciamiento génico (ARNi) en L. potaninii.
Análisis de unión de factores de transcripción.

Principales resultados:

Se identificaron dos proteínas DUF707 como genes centrales en la respuesta de las raíces a la sequía.
La expresión y la actividad promotora de LpDUF707-1 fueron inducidas por la sequía y el ABA, mejorando el crecimiento de las raíces y la tolerancia a la sequía.
El factor de transcripción LpOBP3.1 reprime la actividad de LpDUF707-1; su supresión por la sequía/ABA promueve el crecimiento de las raíces y la tolerancia.

Conclusiones:

Un nuevo módulo regulador que involucra LpDUF707-1 y LpOBP3.1 controla el crecimiento de las raíces y la tolerancia a la sequía en L. potaninii.
Estos hallazgos proporcionan objetivos génicos potenciales para la ingeniería de cultivos tolerantes a la sequía con sistemas radiculares mejorados.

Palabras clave:

Factor de transcripción Dof Lespedeza potaninii proteína de dominio de función desconocida estrés por sequía desarrollo de raíces

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