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When the ribosomal DNA does not tell the truth: The case of the taxonomic position of Kurtia argillacea, an ericoid mycorrhizal fungus residing among Hymenochaetales
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SYSNO ASEP 0488828 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title When the ribosomal DNA does not tell the truth: The case of the taxonomic position of Kurtia argillacea, an ericoid mycorrhizal fungus residing among Hymenochaetales Author(s) Kolařík, Miroslav (MBU-M) RID, ORCID
Vohník, Martin (BU-J) RID, ORCIDSource Title Fungal Biology. - : Elsevier - ISSN 1878-6146
Roč. 122, č. 1 (2018), s. 1-18Number of pages 18 s. Language eng - English Country GB - United Kingdom Keywords Corticioid fungi ; Ericoid mycorrhizal fungi ; Heterotachy Subject RIV EE - Microbiology, Virology OECD category Microbiology Subject RIV - cooperation Institute of Botany - Ecology, Behaviour R&D Projects LO1509 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EE2.3.30.0003 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) ED1.1.00/02.0109 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support MBU-M - RVO:61388971 ; BU-J - RVO:67985939 UT WOS 000424173200001 EID SCOPUS 85034816657 DOI 10.1016/j.funbio.2017.09.006 Annotation The nuclear ribosomal DNA (nuc-rDNA) is widely used for the identification and phylogenetic reconstruction of Agaricomycetes. However, nuc-rDNA-based phylogenies may sometimes be in conflict with phylogenetic relationships derived from protein coding genes. In this study, the taxonomic position of the basidiomycetous mycobiont that forms the recently discovered sheathed ericoid mycorrhiza was investigated, because its nuc-rDNA is highly dissimilar to any other available fungal sequences in terms of nucleotide composition and length, and its nuc-rDNA-based phylogeny is inconclusive and significantly disagrees with protein coding sequences and morphological data. In the present work, this mycobiont was identified as Kurtia argillacea (= Hyphoderma argillaceum) residing in the order Hymenochaetales (Basidiomycota). Bioinformatic screening of the Kurtia ribosomal DNA sequence indicates that it represents a gene with a non-standard substitution rate or nucleotide composition heterogeneity rather than a deep paralogue or a pseudo gene. Such a phenomenon probably also occurs in other lineages of the Fungi and should be taken into consideration when nuc-rDNA (especially that with unusual nucleotide composition) is used as a sole marker for phylogenetic reconstructions. Kurtia argillacea so far represents the only confirmed non-sebacinoid ericoid mycorrhizal fungus in the Basidiomycota and its intriguing placement among mostly saprobic and parasitic Hymenochaetales begs further investigation of its eco-physiology. Workplace Institute of Microbiology Contact Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Year of Publishing 2019
Number of the records: 1