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dc.contributor.authorEdwards, Mercedes R.spa
dc.contributor.authorSalazar, M.E.spa
dc.contributor.authorSamsonoff, W.A.spa
dc.contributor.authorCano, L.E.spa
dc.contributor.authorOstrander, G.A.spa
dc.contributor.authorRestrepo Moreno, Ángelaspa
dc.date.accessioned2021-11-16T16:50:06Z-
dc.date.available2021-11-16T16:50:06Z-
dc.date.issued1991-
dc.identifier.issn0301-486X-
dc.identifier.urihttps://repositorio.accefyn.org.co/handle/001/1048-
dc.description.abstractThe ultrastructure of asexual spores (conidia) produced by the mycelial form of Paracoccidioides brasiliensis was studied for the first time with transmission electron microscopy, using thin sections of aldehyde-osmium-fixed and epoxy-resin-embedded samples. The various types of conidia observed in the sections correlated well with previous light-microscopic descriptions. These types were intercalary or apical conidia, depending on their location along the originating hyphae. As in previous studies they were characterized as arthroconidia, aleuriospores and sessile or pedunculate pyriform conidia. The sporogenous cells were clearly distinguished from hyphal cells by the thickness and appearance of their cell walls. Copious fibrillar material (glycocalyx) detected at the cell surface was stained with ruthenium red during the fixation process. Typical subcellular organelles (nucleus, nucleolus, mitochondria, ribosomes, etc) were found in most of the sections. It was concluded that the spores produced by the mycelial phase of P. brasiliensis possess all attributes of viable and physiologically competent eukaryotic cells.eng
dc.description.abstractLa ultraestructura de las esporas asexuales (conidios) producidas por la forma micelial de Paracoccidioides brasiliensis se estudió por primera vez con microscopía electrónica de transmisión, utilizando secciones delgadas de muestras fijadas con aldehído-osmio e incrustadas con resina epoxi. Los diversos tipos de conidios observados en las secciones se correlacionaron bien con descripciones microscópicas de luz previas. Estos tipos eran conidios intercalares o apicales, dependiendo de su ubicación a lo largo de las hifas de origen. Como en estudios anteriores, se caracterizaron como artroconidios, aleuriosporas y conidios piriformes sésiles o pedunculados. Las células esporógenas se distinguieron claramente de las hifas por el grosor y apariencia de sus paredes celulares. El abundante material fibrilar (glucocáliz) detectado en la superficie celular se tiñó con rojo de rutenio durante el proceso de fijación. En la mayoría de las secciones se encontraron orgánulos subcelulares típicos (núcleo, nucleolo, mitocondrias, ribosomas, etc.). Se concluyó que las esporas producidas por la fase micelial de P. brasiliensis poseen todos los atributos de células eucariotas viables y fisiológicamente competentes.spa
dc.languageeng-
dc.publisherSpringer-
dc.relation.urihttps://doi.org/10.1007/BF00437210-
dc.titleElectron microscopic study of conidia produced by the mycelium of Paracoccidioides brasiliensiseng
dc.typearticleeng
dc.subject.lembMicroscopía electrónicaspa
dc.subject.lembConidiosspa
dc.type.driverinfo:eu-repo/semantics/articleeng
dc.type.localArtículospa
dc.identifier.doi10.1007/BF00437210-
dc.subject.keywordsParacoccidioides brasiliensisspa
dc.citation.journalTitleMycopathologia-
dc.relation.citationvolume114-
dc.citation.spage169-
dc.citation.epage177-
dc.contributor.directorJean-Philippe Bouchara-
dc.relation.citationissue3-
dc.source.bibliographiccitationEdwards, Mercedes R.; Salazar, M.E.; Samsonoff, W.A.; Cano, L.E.; Ostrander, G.A. & Restrepo, A. (1991). Electron microscopic study of conidia produced by the mycelium of Paracoccidioides brasiliensis. Mycopathologia, 114(3), 169-177-
Appears in Collections:DHAA Paracoccidioidomicosis. Biología

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