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Neofusicoccum laricinum interrumpe las defensas de las largas a través de la degradación coordinada de la pared

Yongfeng Yang¹, Shifen Tang¹, Ning Kong¹

¹College of Forestry, Shenyang Agricultural University, Shenyang, China.

Physiologia plantarum

|February 11, 2026

Resumen

Neofusicoccum laricinum, un patógeno de la plaga de los brotes de alerce, utiliza enzimas que degradan la pared celular y suprime las defensas del huésped. Comprender su estrategia de infección en dos fases ayuda a gestionar las amenazas a China.

Área de la Ciencia:

Patología Vegetal Patología vegetal.
La micología de la micología.
Ciencia de la silvicultura Ciencia de la silvicultura

Sus antecedentes:

La albahaca (Larix spp.) es una especie de albahaca. es crucial para la reforestación de China, pero está amenazada por la plaga de Neofusicoccum laricinum.
Comprender la biología y la virulencia de los patógenos es esencial para un manejo eficaz de las enfermedades.

Objetivo del estudio:

Caracterizar los rasgos biológicos y los mecanismos de virulencia de N. laricinum.
Investigar las interacciones huésped-patógeno en el alerce.
Informar las estrategias de manejo de enfermedades para las plantaciones de alerces.

Principales métodos:

Aislamiento e identificación de 25 cepas de N. laricinum utilizando técnicas morfológicas y moleculares.
Evaluaciones de crecimiento bajo diferentes temperaturas y pH.
Ensayos de patogenicidad, análisis de la actividad enzimática (PMG, PG) y evaluación de la respuesta al estrés oxidativo del huésped (SOD, POD).
Análisis del transcriptoma para identificar los genes de defensa del huésped afectados (sintasa de celulosa, peroxidasa).

Principales resultados:

Crecimiento óptimo de N. laricinum a 18 °C y pH 9-11, con una virulencia significativa específica de la cepa.
Las cepas hipervirulentas producían altos niveles de enzimas que degradan la pared celular (CWDEs).
El patógeno interrumpió las defensas oxidativas del huésped, regulando a la baja la actividad de la superóxido dismutasa (SOD) y la peroxidasa (POD).
Los datos del transcriptoma revelaron la supresión de la síntesis de celulosa y la expresión génica de la peroxidasa, impactando la síntesis de la pared celular del alerce y las defensas antioxidantes.

Conclusiones:

N. laricinum emplea una sofisticada estrategia de infección de dos fases: CWDEs para la violación inicial y la supresión de los sistemas antioxidantes del huésped.
El patógeno manipula activamente las defensas del huésped, inhibiendo la síntesis de la pared celular y la eliminación de ROS.
Los hallazgos proporcionan objetivos moleculares para la intervención y conocimientos sobre la dinámica de los alerces patógenos bajo el cambio climático.

Palabras clave:

Neofusicoccum laricinum también se conoce como Neofusicoccum laricinum.Defensa antioxidante de las defensas.enzimas que degradan las paredes celulares.interacción huésped-patógeno.El tiro de alercia es una plaga de la peste.

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