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Molecular studies on terricolous microfungi reveal novel anamorphs of two Tuber species

Published online by Cambridge University Press:  05 August 2004

Alexander URBAN ,
Isabell NEUNER-PLATTNER ,
Irmgard KRISAI-GREILHUBER  and
Kurt HASELWANDTER
Alexander URBAN
Affiliation:
Department of Mycology and Cryptogamic Botany, Institute of Botany, University of Vienna, Rennweg 14, A-1030 Wien, Austria. E-mail: alexander.urban@univie.ac.at
Isabell NEUNER-PLATTNER
Affiliation:
Department of Microbiology, University of Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria.
Irmgard KRISAI-GREILHUBER
Affiliation:
Department of Mycology and Cryptogamic Botany, Institute of Botany, University of Vienna, Rennweg 14, A-1030 Wien, Austria. E-mail: alexander.urban@univie.ac.at
Kurt HASELWANDTER
Affiliation:
Department of Microbiology, University of Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria.
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Abstract

This study reports novel terricolous mitosporic fungal morphs nested in the genus Tuber according to molecular phylogenetic analysis. Fungal DNA was amplified directly from field-collected anamorph samples. Nuclear ribosomal DNA (nrDNA) sequences including the ITS regions and the D1 and D2 domains of the LSU identify the anamorphs as mitosporic Tuber borchii and Tuber oligospermum. The link of the novel anamorphs to the genus Tuber is confirmed by the comparative analysis of five collections from four sampling sites.

Ectomycorrhizas with characteristic features of Tuber borchii ectomycorrhizas were found in the soil volume collected with one of the mitosporic T. borchii collections. A nrDNA sequence amplified from these ectomycorrhizae is identical with the corresponding anamorph sequence.

The possible role of the newly discovered anamorphs in the Tuber life-cycle and the potential significance of anamorphs for the propagation of ectomycorrhizal fungi are discussed.

Type
Research Article
Information
Mycological Research , Volume 108 , Issue 7 , July 2004 , pp. 749 - 758
Copyright
© The British Mycological Society 2004

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