Taxonomic significance of fucose in the class Urediniomycetes: distribution of fucose in cell wall and phylogeny of urediniomycetous yeasts.
Syst Appl Microbiol, 2000/4;23(1):63-70.
Takashima M[1], Hamamoto M, Nakase T
Affiliations
PMID: 10879980
Impact factor: 4.064
Abstract
The carbohydrate compositions of cell wall were determined in the strains of class Urediniomycetes, mainly ballistoconidium-forming yeasts and related taxa. The major component of cell wall was mannose, and glucose was included as the second component, but xylose was not detected in any strain. Out of 41 strains examined, 39 contained galactose, 14 contained arabinose and 12 contained rhamnose. As a minor component, fucose was detected in 30 strains but not in 11 strains. A phylogenetic tree based on 18S rDNA sequences indicated that the fucose-lacking strains, Erythrobasidium hasegawianum, Rhodotolura aurantiaca, R. lactosa, R. minuta, Sakaguchia dacryoidea, Sporobolomyces coprosmae, S. elongatus, S. folicola, S. gracilis, S. kluyverinielii and S. oryzicola, constituted a distinct cluster from those strains which contained fucose. This cluster corresponded to one of the five subclusters, the Erythrobasidium cluster, in the phylogenetic tree of class Urediniomycetes. The carbohydrate composition of cell wall is believed to reflect the phylogenetic relationships among basidiomycetous fungi. The presence or absence of fucose in cell wall should be regarded as an important phenotypic characteristic in the taxonomy of basidiomycetes.
MeSH terms
Basidiomycota; Carbohydrates; Cell Wall; DNA, Fungal; DNA, Ribosomal; Fucose; Molecular Sequence Data; Phylogeny; RNA, Ribosomal, 18S; Sequence Analysis, DNA
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