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Delimitation and phylogeny of Dictyochaeta, and introduction of Achrochaeta and Tubulicolla, genera nova.
Réblová, Martina; Nekvindová, Jana; Kolarík, Miroslav; Hernández-Restrepo, Margarita.
Afiliação
  • Réblová M; Department of Taxonomy, Institute of Botany, Czech Academy of Sciences, 252 43 Pruhonice, Czech Republic.
  • Nekvindová J; Department of Clinical Biochemistry and Diagnostics, University Hospital Hradec Králové, 500 05 Hradec Králové, Czech Republic.
  • Kolarík M; Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology, Czech Academy of Sciences, 142 20 Prague 4, Czech Republic.
  • Hernández-Restrepo M; Westerdijk Fungal Biodiversity Institute, 3508 AD Utrecht, The Netherlands.
Mycologia ; 113(2): 390-433, 2021.
Article em En | MEDLINE | ID: mdl-33595417
ABSTRACT
Dictyochaeta (Chaetosphaeriaceae) is a phialidic dematiaceous hyphomycete with teleomorphs classified in Chaetosphaeria. It is associated with significant variability of asexual morphological traits, which led to its broad delimitation. In the present study, six loci nuc rDNA internal transcribed spacer region ITS1-5.8S-ITS2 (ITS barcode), nuc 18S rDNA (18S), nuc 28S rDNA (28S), DNA-directed RNA polymerase II second largest subunit gene (RPB2), translation elongation factor 1-α (TEF1-α), and ß-tubulin (TUB2), along with comparative morphological and cultivation studies, are used to reevaluate the concept of Dictyochaeta and establish species boundaries. Based on revised species, morphological characteristics of conidia (shape, septation, absence or presence of setulae), collarettes (shape), and setae (presence or absence) and an extension of the conidiogenous cell proved to be important at the generic level. The dual DNA barcoding using ITS and TEF1-α, together with TUB2, facilitated accurate identification of Dictyochaeta species. Thirteen species are accepted, of which seven are characterized in this study; an identification key is provided. It was revealed that D. fuegiana, the type species, is a complex of three distinct species including D. querna and the newly described D. stratosa. Besides, a new species, D. detriticola, and two new combinations, D. callimorpha and D. montana, are proposed. An epitype of D. montana is selected. Dictyochaeta includes saprobes on decaying wood, bark, woody fruits, and fallen leaves. Dictyochaeta is shown to be distantly related to the morphologically similar Codinaea, which is resolved as paraphyletic. Chaetosphaeria talbotii with a Dictyochaeta anamorph represents a novel lineage in the Chaetosphaeriaceae; it is segregated from Dictyochaeta, and a new genus Achrochaeta is proposed. Multigene phylogenetic analysis revealed that D. cylindrospora belongs to the Vermiculariopsiellales, and a new genus Tubulicolla is introduced.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Filogenia / Ascomicetos / DNA Fúngico Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Filogenia / Ascomicetos / DNA Fúngico Idioma: En Ano de publicação: 2021 Tipo de documento: Article