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1 Biotechnical Faculty, Department of Biology, Ve
na pot 111, SI-1000
Ljubljana, Slovenia
2 CBS Fungal Biodiversity Centre, P.O. Box 85167, 3508 AD Utrecht, The
Netherlands
3 Institute for Biodiversity and Ecosystem Dynamics, University of
Amsterdam, Kruislaan 315, 1098 SM Amsterdam, The Netherlands
4 Agricultural Institute of Slovenia, Hacquetova 17, p.p. 2553, 1001
Ljubljana, Slovenia
*
Correspondence: Polona Zalar,
polona.zalar{at}bf.uni-lj.si
Saprobic Cladosporium isolates morphologically similar to C. sphaerospermum are phylogenetically analysed on the basis of DNA sequences of the ribosomal RNA gene cluster, including the internal transcribed spacer regions ITS1 and ITS2, the 5.8S rDNA (ITS) and the small subunit (SSU) rDNA as well as β-tubulin and actin gene introns and exons. Most of the C. sphaerospermum-like species show halotolerance as a recurrent feature. Cladosporium sphaerospermum, which is characterised by almost globose conidia, is redefined on the basis of its ex-neotype culture. Cladosporium dominicanum, C. psychrotolerans, C. velox, C. spinulosum and C. halotolerans, all with globoid conidia, are newly described on the basis of phylogenetic analyses and cryptic morphological and physiological characters. Cladosporium halotolerans was isolated from hypersaline water and bathrooms and detected once on dolphin skin. Cladosporium dominicanum and C. velox were isolated from plant material and hypersaline water. Cladosporium psychrotolerans, which grows well at 4 °C but not at 30 °C, and C. spinulosum, having conspicuously ornamented conidia with long digitate projections, are currently only known from hypersaline water. We also newly describe C. salinae from hypersaline water and C. fusiforme from hypersaline water and animal feed. Both species have ovoid to ellipsoid conidia and are therefore reminiscent of C. herbarum. Cladosporium langeronii (= Hormodendrum langeronii) previously described as a pathogen on human skin, is halotolerant but has not yet been recorded from hypersaline environments.
Taxonomic novelties: Cladosporium dominicanum Zalar, de Hoog & Gunde-Cimerman, sp. nov., C. fusiforme Zalar, de Hoog & Gunde-Cimerman, sp. nov., C. halotolerans Zalar, de Hoog & Gunde-Cimerman, sp. nov., C. psychrotolerans Zalar, de Hoog & Gunde-Cimerman, sp. nov., C. salinae Zalar, de Hoog & Gunde-Cimerman, sp. nov., C. spinulosum Zalar, de Hoog & Gunde-Cimerman, sp. nov., C. velox Zalar, de Hoog & Gunde-Cimerman, sp. nov.
Keywords Actin / β-tubulin / halotolerance / ITS rDNA / phylogeny / SSU rDNA / taxonomy
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K. Schubert, J. Z. Groenewald, U. Braun, J. Dijksterhuis, M. Starink, C.F. Hill, P. Zalar, G.S. de Hoog, and P.W. Crous Biodiversity in the Cladosporium herbarum complex (Davidiellaceae, Capnodiales), with standardisation of methods for Cladosporium taxonomy and diagnostics Stud Mycol, January 1, 2007; 58(1): 105 - 156. [Abstract] [Full Text] [PDF] |
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