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Deoxyribonucleic acid base composition and taxonomy in the genus Geotrichum Link

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Abstract

The molar percentage of guanine + cytosine (% GC) in the DNA from 25 yeast-like fungi related to the genus Geotrichum has been measured. This criterion together with the biochemical characteristics allow the division of the species into 3 groups: one group resembling G. candidum (% GC: 31.5–42) and containing 8 imperfect and 6 perfect forms. In this group only G. capitatum has a lower % GC (31.5). A second group of 6 species resembling the genus Trichosporon (57–60%) and a third intermediate category of 4 species (42–53.5%) were observed. The GC-values correlate well with biochemical characters, e.g. the presence of urease, the number of organic substrates assimilated, and also with the presence of characters typical of the Ascomycetes or the Basidiomycetes.

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Authors and Affiliations

  1. Laboratoire de Cryptogamie et de Phytopharmacie, Faculté de Pharmacie, 8 Avenue Rockefeller, 69373, Lyon Cédex 2, France

    Eveline Guého

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  1. Eveline Guého
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This work was supported by I.N.S.E.R.M. (Institut National de la Santé et de la Recherche Médicale) C.R.L. no 76 1 153 8.

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Guého, E. Deoxyribonucleic acid base composition and taxonomy in the genus Geotrichum Link. Antonie van Leeuwenhoek 45, 199–210 (1979). https://doi.org/10.1007/BF00418584

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