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Registros recuperados: 6
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Delimitation and characterisation of Talaromyces purpurogenus and related species Naturalis
Yilmaz, N.; Houbraken, J.; Hoekstra, E.S.; Frisvad, J.C.; Visagie, C.M.; Samson, R.A..
Taxa of the Talaromyces purpurogenus complex were studied using a polyphasic approach. ITS barcodes were used to show relationships between species of the T. purpurogenus complex and other Talaromyces species. RPB1, RPB2, β-tubulin and calmodulin sequences were used to delimit phylogenetic species in the complex. These data, combined with phenotypic characters, showed that the complex contains four species: T. purpurogenus, T. ruber comb. nov. and two new species T. amestolkiae sp. nov. and T. stollii sp. nov. The latter three species belong to the same clade and T. purpurogenus is located in a phylogenetic distant clade. The four species all share similar conidiophore morphologies, but can be distinguished by macromorphological characters. Talaromyces...
Tipo: Article / Letter to the editor Palavras-chave: Penicillium purpurogenum; Rubratoxin; Polyphasic taxonomy.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/531835
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New penicillin-producing Penicillium species and an overview of section Chrysogena Naturalis
Houbraken, J.; Frisvad, J.C.; Seifert, K.A.; Overy, D.P.; Tuthill, D.M.; Valdez, J.G.; Samson, R.A..
Species classified in Penicillium sect. Chrysogena are primary soil-borne and the most well-known members are P. chrysogenum and P. nalgiovense. Penicillium chrysogenum has received much attention because of its role in the production on penicillin and as a contaminant of indoor environments and various food and feedstuffs. Another biotechnologically important species is P. nalgiovense, which is used as a fungal starter culture for the production of fermented meat products. Previous taxonomic studies often had conflicting species circumscriptions. Here, we present a multigene analysis, combined with phenotypic characters and extrolite data, demonstrating that sect. Chrysogena consists of 18 species. Six of these are newly described here (P. allii-sativi,...
Tipo: Article / Letter to the editor Palavras-chave: Fleming; P. chrysogenum; P. rubens; Phylogeny; Taxonomy.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/532320
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Ochratoxin A producing Penicillium verrucosum isolates from cereals reveal large AFLP fingerprinting variability Organic Eprints
Frisvad, J.C.; Lund, F.; Elmholt, S..
Aims: To examine if molecular amplified fragment length polymorphism (AFLP) fingerprinting of the only ochratoxin A-producing species in European cereals, Penicillium verrucosum, can be used as a method in hazard analysis using critical control points (HACCP). Methods and Results: A total of 321 isolates of P. verrucosum were isolated from ochratoxin A contaminated cereals from Denmark (oats), UK (wheat and barley) and Sweden (wheat). Of these, 236 produced ochratoxin A as determined by thin layer chromatography; 185 ochratoxin A-producing isolates were selected for AFLP fingerprinting. A total of 138 isolates had unique AFLP patterns, whereas 52 isolates could be allocated to small groups containing from two to four isolates with similar AFLP patterns....
Tipo: Journal paper Palavras-chave: Post harvest management and techniques.
Ano: 2005 URL: http://orgprints.org/7392/1/7392.pdf
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Polyphasic taxonomy of the heat resistant ascomycete genus Byssochlamys and its Paecilomyces anamorphs Naturalis
Samson, R.A.; Houbraken, J.; Varga, J.; Frisvad, J.C..
Byssochlamys and related Paecilomyces strains are often heat resistant and may produce mycotoxins in contaminated pasteurised foodstuffs. A comparative study of all Byssochlamys species was carried out using a polyphasic approach to find characters that differentiate species and to establish accurate data on potential mycotoxin production by each species. Phylogenetic analysis of the ITS region, parts of the â-tubulin and calmodulin genes, macro- and micromorphological examinations and analysis of extrolite profiles were applied. Phylogenetic analyses revealed that the genus Byssochlamys includes nine species, five of which form a teleomorph, i.e. B. fulva, B. lagunculariae, B. nivea, B. spectabilis and B. zollerniae, while four are asexual, namely P....
Tipo: Article / Letter to the editor Palavras-chave: Byssochlamys; Emodin; Eurotiales; Extrolites; Heat resistance; Mycophenolic acid; Paecilomyces; Patulin.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/532420
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Taxonomic re-evaluation of species in Talaromyces section Islandici, using a polyphasic approach Naturalis
Yilmaz, N.; Visagie, C.M.; Frisvad, J.C.; Houbraken, J.; Jacobs, K.; Samson, R.A..
The taxonomy of Talaromyces rugulosus, T. wortmannii and closely related species, classified in Talaromyces sect. Islandici, is reviewed in this paper. The species of Talaromyces sect. Islandici have restricted growth on MEA and CYA, generally have yellow mycelia and produce rugulosin and/or skyrin. They are important in biotechnology (e.g. T. rugulosus, T. wortmannii) and in medicine (e.g. T. piceus, T. radicus). The taxonomy of sect. Islandici was resolved using a combination of morphological, extrolite and phylogenetic data, using the Genealogical Concordance Phylogenetic Species Recognition (GCPSR) concept, with special focus on the T. rugulosus and T. wortmannii species complexes. In this paper, we synonymise T. variabilis, Penicillium...
Tipo: Article / Letter to the editor Palavras-chave: Multi-gene phylogeny; Penicillium rugulosum; Penicillium variabile; Talaromyces acaricola; Talaromyces crassus; Talaromyces infraolivaceus; Talaromyces subaurantiacus.
Ano: 2016 URL: http://www.repository.naturalis.nl/record/607357
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Unravelling species boundaries in the Aspergillus viridinutans complex (section Fumigati): opportunistic human and animal pathogens capable of interspecific hybridization Naturalis
Hubka, V.; Barrs, V.; Dudová, Z.; Sklenář, F.; Kubátová, A.; Matsuzawa, T.; Yaguchi, T.; Horie, Y.; Nováková, A.; Frisvad, J.C.; Talbot, J.J.; Kolařík, M..
Although Aspergillus fumigatus is the major agent of invasive aspergillosis, an increasing number of infections are caused by its cryptic species, especially A. lentulus and the A. viridinutans species complex (AVSC). Their identification is clinically relevant because of antifungal drug resistance and refractory infections. Species boundaries in the AVSC are unresolved since most species have uniform morphology and produce interspecific hybrids in vitro. Clinical and environmental strains from six continents (n = 110) were characterized by DNA sequencing of four to six loci. Biological compatibilities were tested within and between major phylogenetic clades, and ascospore morphology was characterised. Species delimitation methods based on the multispecies...
Tipo: Article / Letter to the editor Palavras-chave: Aspergillus felis; Aspergillus fumigatus; Invasive aspergillosis; Mating-type genes; Multispecies coalescence model; Neosartorya udagawae; Scanning electron microscopy; Soil fungi.
Ano: 2018 URL: http://www.repository.naturalis.nl/record/652411
Registros recuperados: 6
Primeira ... 1 ... Última
 

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