HONGOS FITOPATÓGENOS MODULAN LA EXPRESIÓN DE LOS GENES ANTIMICROBIANOS phlD Y hcnC DE LA RIZOBACTERIA Pseudomonas fluorescens UM270
DOI:
https://doi.org/10.18633/biotecnia.v20i2.609Palabras clave:
Biocontrol, 2, 4-diacetilfloroglucinol, ácido cianhídrico, rizobacteriaResumen
El objetivo de este trabajo fue evaluar el efecto antagónico de la rizobacteria promotora del crecimiento vegetal Pseudomonas fluorescens UM270 hacia los hongos fitopatógenos Botrytis cinerea, Fusarium oxysporum, Fusarium solani y Rhizoctonia solani. También, se determinó la expresión de los genes phlD y hcnC de la cepa UM270 en presencia de los fitopatógenos durante bioensayos de antagonismo in vitro. Los resultados muestran que la cepa UM270 logra inhibir el crecimiento del micelio de B. cinerea (45%), F. solani (25%) y R. solani (24%) en diferente grado, mientras que para F. oxysporum (1%) no hubo inhibición significativa. Al analizar la expresión del gen phlD, se observó que los patógenos la modulan diferencialmente, ya que mientras B. cinerea induce su expresión, los demás patógenos la reprimen . En el caso del gen hcnC, B. cinerea y F. oxysporum no afectaron su expresión, mientras que F. solani y R. solani la inhibieron. Estos resultados sugieren que los fitopatógenos pueden modular la expresión de genes importantes para la síntesis de compuestos antimicrobianos en Pseudomonas fluoresces UM270.
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