IDENTIFICACIÓN Y CARACTERIZACIÓN DEL MATERIAL EXTRACROMOSOMAL DE LA CEPA (MCG2) DE Sclerotium cepivorum BERK: AGENTE CAUSAL DE LA PUDRICIÓN BLANCA DEL AJO
Resumen
Resumen
Sclerotium cepivorum Berk es un hongo imperfecto, causante de la enfermedad conocida como “pudrición blanca del ajo”, impactando negativamente en los cultivares de ajo y cebolla, entre otros de la familia Allium. El hongo es capaz de sobrevivir en el suelo por décadas formando estructuras de resistencia y propagación (esclerocios). Con la finalidad de lograr a mediano plazo un control efectivo de la enfermedad, en el grupo de trabajo nos hemos enfocado a conocer más sobre la biología de este hongo, y hemos detectado que, en algunos de los aislados, está presente material genético extracromosomal (MGE) de diferente tamaño molecular. Con el objetivo de determinar la naturaleza de este material, se emplearon diferentes enfoques bioquímicos y moleculares para purificar e identificar el material extracromosomal. Se identificó que el MGE es RNA de doble cadena, por su resistencia al tratamiento con DNasa I y RNasa A. Dicho material podría provenir de un micovirus multipartita.
Palabras clave:esclerocios; micovirus; Material Genético Extracromosomal; dsRNA
" IDENTIFICATION AND CHARACTERIZATION OF EXTRACROMOSOMAL MATERIAL OF Sclerotium cepivorum BERK (MCG2) STRAIN: CAUSAL AGENT OF GARLIC WHITE ROT”
Abstract
Sclerotium cepivorum Berk is an imperfect fungus that causes the disease known as "white rot of garlic," negatively impacting garlic and onion cultivars, among others of the Allium family. The fungus can survive in the soil for decades, forming resistance and propagation structures (sclerotia). To effectively control the disease in the medium term, the working group has focused on learning more about the biology of this fungus, and we have detected that in some isolates, extrachromosomal genetic material (MGE) of different molecular sizes is present. Various biochemical and molecular approaches were used to purify and identify the extrachromosomal material. The MGE was identified as double-stranded RNA due to its resistance to DNase I and RNase A treatment. Such material could come from a multipartite mycovirus.
Keywords:sclerotia; micovirus; Extracromosomal Genetic Material; dsRNA
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