Pseudomonas spp. como biocontrol de la muerte descendente por Phytophthora palmivora en Tectona grandis

Autores/as

DOI:

https://doi.org/10.70881/mcj/v4/n2/155

Palabras clave:

Biocontrol, severidad, incidencia, ácido indolacético

Resumen

La teca es un árbol de gran valor comercial que enfrenta amenazas fitosanitarias como la muerte descendente causada por P. palmivora, un hongo del suelo que compromete el desarrollo y supervivencia de las plántulas. Frente a la limitada eficacia de los métodos convencionales, esta investigación evaluó el uso de rizobacterias del género Pseudomonas como alternativa biológica para el control del patógeno. Se aplicó un Diseño Completamente al Azar (DCA) con seis tratamientos (cinco cepas bacterianas y un control) y tres repeticiones. Los resultados destacaron las cepas bacterianas aisladas presentaron diversidad morfológica, bioquímica y funcional, destacándose BZ1 y QV2 por su alta capacidad de producción de ácido indolacético (AIA) La cepa QV3 como la más efectiva: inhibió el crecimiento de P. palmivora en un 78 %, redujo la incidencia de la enfermedad al 22,4 % y la severidad al 7,9 %. En cuanto al crecimiento vegetal, QV3 promovió la mayor altura de planta (30,2 cm), mayor diámetro, peso fresco de biomasa aérea (28,2 g) y radicular, contenido de clorofila (37,6 SPAD) y volumen radicular (11,8 cm³). En conclusión, la cepa QV3 demostró alto potencial como agente de biocontrol y bioestimulante, destacándose por su doble función en la supresión del patógeno y promoción del desarrollo de T. grandis

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Referencias

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2026-05-17

Cómo citar

Quintana Zambrano, J. J., Abasolo-Pacheco, F., Guanoquiza Calero, J. C., Borja Freile, C. S., & Castillo Quijije, D. B. (2026). Pseudomonas spp. como biocontrol de la muerte descendente por Phytophthora palmivora en Tectona grandis. Multidisciplinary Collaborative Journal, 4(2), 120-142. https://doi.org/10.70881/mcj/v4/n2/155

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