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  • Hormonema  (5)
  • Trichosporon  (3)
  • Dothideaceae  (2)
  • Pringsheimia  (2)
  • ecology  (2)
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  • 1
    Digitale Medien
    Digitale Medien
    Coenzyme Q systems in ascomycetous black yeasts (1989)
    Springer
    Antonie van Leeuwenhoek 56 (1989), S. 349-356 
    Details
    ISSN: 1572-9699
    Schlagwort(e): coenzyme Q ; ubiquinones ; black yeasts ; Exophiala ; Aureobasidium ; Hormonema ; yeast-like fungi ; ascomycetes ; taxonomy ; chemotaxonomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract 72 Strains belonging to 44 species of ascomycetous black yeasts were analyzed for their coenzyme Q systems. Prevalent were Q-10 and dihydrogenated Q-10 systems. Members of the Dothidealean suborder Dothideineae have Q-10 (H2), while those belonging to the suborder Pseudosphaeriineae mostly have Q-10. The anamorph genus Exophiala Carmichael and the teleomorph genus Capronia Sacc. seem to be heterogenous.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00443748
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  • 2
    Digitale Medien
    Digitale Medien
    Contributions to a revision of the genusTrichosporon (1992)
    Springer
    Antonie van Leeuwenhoek 61 (1992), S. 289-316 
    Details
    ISSN: 1572-9699
    Schlagwort(e): Trichosporon ; white piedra ; systemic mycosis ; taxonomy ; nDNA ; rRNA ; ubiquinone systems ; basidiomycetous yeasts
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The genusTrichosporon was revised using characters of morphology, ultrastructure, physiology, ubiquinone systems, mol% G+C of DNA, DNA/DNA reassociations and 26S ribosomal RNA partial sequences. A total of 101 strains was used, including all available type and authentic cultures of previously described taxa. Nineteen taxa could be distinguished, 15 of which having Q-9 coenzyme systems and 4 having Q-10. Sixteen previously described names were reduced to synonymy. One new species was described. The genus is characterized by the presence of arthroconidia. Few species possess further diagnostic morphological characters, such as the presence of appressoria, macroconidia or meristematic conidiation. The septa of two species were found to be non-perforate, while those of the remaining species contained dolipores at variable degrees of differentiation, with or without vesicular or tubular parenthesomes. All species were able to assimilate a large number of carbon compounds; visible CO2 production was absent. The genus was found to be fairly homogeneous on the basis of a phylogenetic analysis of partial 26S rRNA sequences, with the exception ofT. pullulans which proved to be unrelated. Most taxa were found to occupy well-defined ecological niches. Within the group of taxa isolated from humans, a distinction found be made between those involved in systemic mycoses and those which mainly caused public or non-public white piedras, respectively. One species was consistently associated with animals, while others came mainly from soil or water. One species was mesophilic and another psychrophilic.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00713938
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  • 3
    Digitale Medien
    Digitale Medien
    Capnobotryella renispora on roof tile (1990)
    Springer
    Antonie van Leeuwenhoek 58 (1990), S. 265-269 
    Details
    ISSN: 1572-9699
    Schlagwort(e): black yeasts ; Capnobotryella renispora ; ecology ; sooty moulds ; taxonomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Capnobotryella renispora J. Sugiyama is described from a specimen on roof tile and in culture. Its relationship with the black yeasts is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00399338
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  • 4
    Digitale Medien
    Digitale Medien
    Karyology and hyphal characters as taxonomic criteria in Ascomycetous black yeasts and related fungi (1991)
    Springer
    Antonie van Leeuwenhoek 60 (1991), S. 35-42 
    Details
    ISSN: 1572-9699
    Schlagwort(e): black yeasts ; Aureobasidium ; Hormonema ; Hortaea ; Ramichloridium ; Zasmidium ; karyology ; taxonomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Mycelial development of seventy-three strains of black yeasts and related fungi were studied, and numbers of nuclei per hyphal cell were counted. Two main patterns were apparent in expanding hyphae, viz. (1) uninucleate expanding hyphal cells, septum formation strictly following mitosis, and (2) multinucleate, branched, aseptate hyphal tips, septa being formed in a later stage, leading to oligo- or uninucleate mature cells. Characteristic genera in the two groups areExophiala andAureobasidium, respectively. InZasmidium and in someRamichloridium species all mycelial cells are oligonucleate. The character is indicative for relationships at the family level in black yeasts.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00580439
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  • 5
    Digitale Medien
    Digitale Medien
    Neotypification of the genusTrichosporon (1992)
    Springer
    Antonie van Leeuwenhoek 61 (1992), S. 285-288 
    Details
    ISSN: 1572-9699
    Schlagwort(e): Trichosporon ; basidiomycetous yeasts ; nomenclature ; taxonomy ; white piedra ; medical mycology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The currently accepted type species of the genusTrichosporon Behrend isT. beigelii. This species has formerly been regarded as identical toT. cutaneum. However, these fungi are now known to represent separate species with different ecology. The first species described inTrichosporon wasT. ovoides, an agent of human white piedra. A neotype strain is designated for this species, while a lectotype strain is indicated forT. cutaneum. The nameT. beigelii is considered as doubtful and consequently cannot be maintained.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00713937
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  • 6
    Digitale Medien
    Digitale Medien
    Evolution of black yeasts: possible adaptation to the human host (1993)
    Springer
    Antonie van Leeuwenhoek 63 (1993), S. 105-109 
    Details
    ISSN: 1572-9699
    Schlagwort(e): black yeasts ; dimorphism ; ecology ; ecophysiology ; evolution ; halotolerance ; medical mycology ; melanin ; meristematic growth ; opportunistic fungi ; taxonomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Ascomycetous black yeasts show adaptations to a wide array of environmental conditions. Dothideaceous black yeasts are mostly found on plant leaves, while among herpotrichiellaceous species there are numerous opportunists on humans. Factors which are of ecological significance include the presence of melanin and carotene, formation of thick cell walls and meristematic growth, presence of yeast-like phases, presence of additional forms of conidiogenesis, thermo- and osmotolerance, adhesion, hydrophobicity, production of extracellular polysaccharides, siderophores and acidic or alkaline secondary metabolites. The potential pathogenicity of a species is partly determined by its natural ecological niche. Dothideaceous black yeasts are osmotolerant rather than pathogenic. Herpotrichiellaceous black yeasts probably have low competitive ability and are found in rather special niches as secondary saprophytes, e.g., on bacterial mats, on other fungi or in poor environments. Some species possibly utilize animal vectors for dispersal.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00872386
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  • 7
    Digitale Medien
    Digitale Medien
    Phylogenetic relationships ofCryptococcus neoformans and some related basidiomycetous yeasts determined from partial large subunit rRNA sequences (1993)
    Springer
    Antonie van Leeuwenhoek 63 (1993), S. 175-189 
    Details
    ISSN: 1572-9699
    Schlagwort(e): Cryptococcus ; Trichosporon ; rRNA ; phylogeny ; taxonomy ; basidiomycetous yeasts
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The genusCryptococcus was found to be heterogeneous on the basis of partial rRNA sequences. The human-pathogenic speciesC. neoformans, comprising 4 serotypes and havingFilobasidiella neoformans andF. bacillispora as teleomorphs, was found at a relatively large distance fromFilobasidium. Serotypes B and C had identical sequences, while in A and D they were different, with D closer to B and C than to A.Filobasidiella depauperata, which lacks a yeast-like anamorph, clustered withF. neoformans. The genusFilobasidium was clearly separated fromFilobasidiella and clustered withC. albidus, C. kuetzingii, C. gastricus, C. lupi, C. vishniaciae, C. bhutanensis, C. aerius, C. terreus andC. ater. The latter may represent the anamorph ofFilobasidium elegans. The organe to red species ofCryptococcus, as well asC. aquaticus andC. yarrowii, were found completely unrelated with these taxa,C. macerans being affiliated toCystofilobasidium capitatum. The genusTrichosporon was found relatively homogeneous; it includesC. humicola, C. curvatus and the filamentous speciesHyalodendron lignicola. Cryptococcus flavus andC. dimennae probably belong to the Tremellales, though distances between these species are large. The positions ofC. laurentii andC. luteolus remains to be determined.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00872392
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  • 8
    Digitale Medien
    Digitale Medien
    Intraspecific variability and exopolysaccharide production inAureobasidium pullulans (1995)
    Springer
    Antonie van Leeuwenhoek 68 (1995), S. 57-63 
    Details
    ISSN: 1572-9699
    Schlagwort(e): Aureobasidium ; Hormonema ; black yeasts ; PCR-ribotyping ; UP-PCR ; exopolysaccharides
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Forty seven strains of the black yeasts,Aureobasidium pullulans andHormonema dematioides, and the type strain ofHormonema macrosporum were examined using PCR-ribotyping and universally primed PCR with subsequent hybridization. Four groups (populations) were distinguished withinA. pullulans with PCR-ribotyping, which largely coincided with UP-PCR/hybridization groups. The UP-PCR technique revealed a greater degree of heterogeneity between the groups studied. Five strains identified asHormonema dematioides on the basis of physiological and morphological data formed a group recognizable with PCR-ribotyping and UP-PCR/hybridization, which also includedH. macrosporum. Aureobasidium pullulans is characterized by the absence of RsaI restriction sites in rDNA amplified with primers 5.8S-R and LR7, whileHormonema species possessed several bands after RsaI digestion. For analysis of distance between populations, PCR-ribotyping with AluI and MspI is sufficient. Strains ofA. pullulans produce exopolysaccharides in liquid media with different nitrogen sources, while the strains ofHormonema synthesize minor amounts of polysaccharides in media with peptone. Populations ofA. pullulans differ slightly from each other in their optimal, medium-dependent production of polysaccharides.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00873293
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  • 9
    Digitale Medien
    Digitale Medien
    Distinction of species in Aureobasidium and related genera by PCR-ribotyping (1996)
    Springer
    Antonie van Leeuwenhoek 69 (1996), S. 323-329 
    Details
    ISSN: 1572-9699
    Schlagwort(e): black yeasts ; Dothideaceae ; Aureobasidium ; Kabatiella ; Hormonema ; Selenophoma ; dothiora ; Pringsheimia ; taxonomy ; PCR-ribotyping
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Taxonomic markers for differentiation of the anamorph genera Aureobasidium, Hormonema and Kabatiella were developed using PCR-ribotyping with the primers 5.8S-R and LR7 for amplification and the restriction enzymes Alul, DdeI, Hhal, MspI and RsaI for digestion. Aureobasidium and Hormonema are optimally differentiated with MspI; DdeI is particularly useful to distinguish aureobasidium, Kabatiella and Selenophoma. Relationships of the anamorph genera Aureobasidium, Hormoneng and Kabatiella with the teleomorph genera Pringsheimia and Dothiora are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00399621
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  • 10
    Digitale Medien
    Digitale Medien
    Conidiogenesis, nutritional physiology and taxonomy ofAureobasidium andHormonema (1994)
    Springer
    Antonie van Leeuwenhoek 65 (1994), S. 41-54 
    Details
    ISSN: 1572-9699
    Schlagwort(e): black yeasts ; Aureobasidium ; Hormonema ; Kabatiella ; Pringsheimia ; Dothiora ; Dothidae ; Dothideaceae ; conidiogenesis ; physiology ; taxonomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Diagnostic criteria for the distinction of the slightly osmophilic species,Aureobasidium pullulans, and the opportunistic pathogen on conifers,Hormonema dematioides, are provided. Reliable identification requires a combination of characters of conidiogenesis, expansion growth and assimilative abilities. Relationships with species ofKabatiella, and with the teleomorph generaPringsheimia, Dothidea andDothiora, all havingHormonema-like cultural states, are discussed. An identification key is provided.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00878278
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