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Molecular and morphological evidence for the delimitation of Xylaria hypoxylon

Title data

Peršoh, Derek ; Melcher, Martina ; Graf, Katrin ; Fournier, Jacques ; Stadler, Marc ; Rambold, Gerhard:
Molecular and morphological evidence for the delimitation of Xylaria hypoxylon.
In: Mycologia. Vol. 101 (2009) Issue 2 . - pp. 256-268.
ISSN 1557-2536
DOI: https://doi.org/10.3852/08-108

Abstract in another language

[PubMed]Xylaria hypoxylon, the type species of the fungal genus Xylaria (Xylariaceae, Sordariomycetes), was first described by Linnaeus as Clavaria hypoxylon from Sweden. Saccardo and other mycologists assumed a cosmopolitan distribution for this species. However, contradictory reports in literature on its morpho-anatomical characters and strongly inconsistent rDNA sequence data attributed to this species in GenBank suggested the existence of an unresolved species complex. To address this lack of clarity, molecular and morphological characters of numerous specimens and corresponding cultures of X. hypoxylon and related taxa from Europe were studied. Newly obtained 5.8S/ITS nrDNA sequence data were compared with published data and sequences of reference strains. Populations of X. hypoxylon from Europe exhibited rather consistent rDNA sequence data and a relatively uniform holomorphic morphology, except for one specimen from Sweden, which deviated in its ascospore morphology. DNA sequences and morphology of material from other geographic localities, however, showed substantial deviations and therefore indicated the existence of a species of its own. Some samples from Western United States showed DNA sequence data being identical to those of specimens from Europe, suggesting a North American occurrence of X. hypoxylon. Definitely not conspecific with the Swedish material examined during this study appeared to be culture material assigned to X. hypoxylon, the DNA sequence data of which have been used in various phylogenetic studies as a representative of Xylariaceae and Xylariales, respectively. This material and may represent another undescribed non-European species.

Further data

Item Type: Article in a journal
Refereed: No
Additional notes: BAYCEER62963
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Professorship Mycology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Professorship Mycology > Professorship Mycology - Univ.-Prof. Dr. Gerhard Rambold
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 05 May 2015 12:10
Last Modified: 26 Jul 2017 07:14
URI: https://eref.uni-bayreuth.de/id/eprint/12810