Hortaea, a new genus to accommodate Cladosporium werneckii.

DOI 2 Citations Open Access
  • Nishimura Kazuko
    Department of Pathogenic Fungi, Research Institute for Chemobiodynamics, Chiba University
  • Miyaji Makoto
    Department of Pathogenic Fungi, Research Institute for Chemobiodynamics, Chiba University

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Description

A new genus, Hortaea Nishimura et Miyaji, is proposed to accommodate Cladosporium werneckii, the etiological agent of a superficial mycotic infection, tinea nigra, and Hortaea werneckii (Horta) Nishimura et Miyaji comb. nov. is provided.<br>The fungus is characterized by a unique sympodial conidiogenesis accompanying an annellidic one, which has been observed firstly using a scanning electron microscope as follows.<br>Conidiogenous loci arise from ampullaceous cells formed laterally or terminally on hyphae, lateral branches and projections on hyphae, or directly from the lateral walls of hyphae. These loci elongate and swell in accordance with the production of solitary, terminal conidia, and become thick cylindrical, obclavate or truncate rachises. Bud scars are found on the surface of the rachises, but denticles are absent. Round scars are observed in a few conidiogenous cells on the rachises, but most of the conidiogenous cells show remnants of scars shaped like sickles, half moons or scales. Regardless of the bud scar shapes, a spiral can be drawn on a rachis by tracing the centers of the scars. Namely, the conidiogenous cells are sympodulae because the bud scars are arranged on them sympodially. Such sympodial conidiogenesis is also found in most of the yeast-like conidiogenous cells.<br>Furthermore, there are a few conidiogenous cells with annellatons, which are irregular in comparison with those of E. dermatitidis or E. jeanselmei.<br>These results indicate that H. werneckii is definitely different from the other species of the genus Exophiala and other sympodial dematiaceous fungi.

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Details 詳細情報について

  • CRID
    1390282679188687744
  • NII Article ID
    130003671256
  • DOI
    10.3314/jjmm1960.25.139
  • ISSN
    18846971
    05830516
  • Text Lang
    en
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
    • OpenAIRE
  • Abstract License Flag
    Disallowed

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