Identity of the subalpine–subarctic corticioid fungus Megalocystidium leucoxanthum (Russulales, Basidiomycota) and six related species
Background and aims – To date, Megalocystidium leucoxanthum, a corticioid fungus originally described from the Italian Alps, was considered as a widely distributed species inhabiting numerous angiosperm hosts in the northern hemisphere. Its specimens collected in different geographic areas and from...
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| Format: | Article |
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Meise Botanic Garden
2021-06-01
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| Series: | Plant Ecology and Evolution |
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| Online Access: | https://plecevo.eu/article/24636/download/pdf/ |
| _version_ | 1827608984081661952 |
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| author | Viacheslav Spirin Sergey Volobuev Vera Malysheva Otto Miettinen Heikki Kotiranta Karl-Henrik Larsson |
| author_facet | Viacheslav Spirin Sergey Volobuev Vera Malysheva Otto Miettinen Heikki Kotiranta Karl-Henrik Larsson |
| author_sort | Viacheslav Spirin |
| collection | DOAJ |
| description | Background and aims – To date, Megalocystidium leucoxanthum, a corticioid fungus originally described from the Italian Alps, was considered as a widely distributed species inhabiting numerous angiosperm hosts in the northern hemisphere. Its specimens collected in different geographic areas and from various host species revealed a high morphological variability and thus obfuscated differences from the closely related M. luridum. The objective of this study was to re-establish M. leucoxanthum based on newly collected and sequenced specimens and clarify the identity of morphologically deviating collections previously ascribed to this species.Material and methods – In total, 87 specimens of Megalocystidium spp. (including two historical types) were studied by morphological methods. Their phylogenetic relations were investigated based on DNA sequences (nrITS, nrLSU, and tef1) of 29 specimens.Key results – Based on morphological, ecological and DNA data, we showed M. leucoxanthum sensu typi is a rare species restricted to Alnus alnobetula in subalpine and subarctic zones. Consequently, records from other hosts (mostly representatives of Salicaceae) belong to three other species, M. olens, M. perticatum, and M. salicis, described as new to science. The fourth newly introduced species, M. pellitum, occurs on the same host tree as M. leucoxanthum but it can be separated from the latter due to distinctive morphological traits and DNA sequences. Additionally, Aleurodiscus diffissus is combined in Megalocystidium and the identity of M. luridum is clarified. |
| first_indexed | 2024-03-09T07:23:30Z |
| format | Article |
| id | doaj.art-fc71bad4c7674a30a3b62e0294b54837 |
| institution | Directory Open Access Journal |
| issn | 2032-3921 |
| language | English |
| last_indexed | 2024-03-09T07:23:30Z |
| publishDate | 2021-06-01 |
| publisher | Meise Botanic Garden |
| record_format | Article |
| series | Plant Ecology and Evolution |
| spelling | doaj.art-fc71bad4c7674a30a3b62e0294b548372023-12-03T07:10:11ZengMeise Botanic GardenPlant Ecology and Evolution2032-39212021-06-01154223124410.5091/plecevo.2021.185724636Identity of the subalpine–subarctic corticioid fungus Megalocystidium leucoxanthum (Russulales, Basidiomycota) and six related speciesViacheslav Spirin0Sergey Volobuev1Vera Malysheva2Otto Miettinen3Heikki Kotiranta4Karl-Henrik Larsson5LUOMUS - Finnish Museum of Natural History, University of HelsinkiKomarov Botanical Institute of the Russian Academy of SciencesKomarov Botanical Institute RAS, St PetersburgLUOMUS - Finnish Museum of Natural History, University of HelsinkiFinnish Environment InstituteDepartment of Research and Collections, University of Oslo, Natural History Museum, Postboks 1172, Blindern, 0318 Oslo, NorwayBackground and aims – To date, Megalocystidium leucoxanthum, a corticioid fungus originally described from the Italian Alps, was considered as a widely distributed species inhabiting numerous angiosperm hosts in the northern hemisphere. Its specimens collected in different geographic areas and from various host species revealed a high morphological variability and thus obfuscated differences from the closely related M. luridum. The objective of this study was to re-establish M. leucoxanthum based on newly collected and sequenced specimens and clarify the identity of morphologically deviating collections previously ascribed to this species.Material and methods – In total, 87 specimens of Megalocystidium spp. (including two historical types) were studied by morphological methods. Their phylogenetic relations were investigated based on DNA sequences (nrITS, nrLSU, and tef1) of 29 specimens.Key results – Based on morphological, ecological and DNA data, we showed M. leucoxanthum sensu typi is a rare species restricted to Alnus alnobetula in subalpine and subarctic zones. Consequently, records from other hosts (mostly representatives of Salicaceae) belong to three other species, M. olens, M. perticatum, and M. salicis, described as new to science. The fourth newly introduced species, M. pellitum, occurs on the same host tree as M. leucoxanthum but it can be separated from the latter due to distinctive morphological traits and DNA sequences. Additionally, Aleurodiscus diffissus is combined in Megalocystidium and the identity of M. luridum is clarified.https://plecevo.eu/article/24636/download/pdf/basidiomycetesmolecular systematicsRussulales |
| spellingShingle | Viacheslav Spirin Sergey Volobuev Vera Malysheva Otto Miettinen Heikki Kotiranta Karl-Henrik Larsson Identity of the subalpine–subarctic corticioid fungus Megalocystidium leucoxanthum (Russulales, Basidiomycota) and six related species Plant Ecology and Evolution basidiomycetes molecular systematics Russulales |
| title | Identity of the subalpine–subarctic corticioid fungus Megalocystidium leucoxanthum (Russulales, Basidiomycota) and six related species |
| title_full | Identity of the subalpine–subarctic corticioid fungus Megalocystidium leucoxanthum (Russulales, Basidiomycota) and six related species |
| title_fullStr | Identity of the subalpine–subarctic corticioid fungus Megalocystidium leucoxanthum (Russulales, Basidiomycota) and six related species |
| title_full_unstemmed | Identity of the subalpine–subarctic corticioid fungus Megalocystidium leucoxanthum (Russulales, Basidiomycota) and six related species |
| title_short | Identity of the subalpine–subarctic corticioid fungus Megalocystidium leucoxanthum (Russulales, Basidiomycota) and six related species |
| title_sort | identity of the subalpine subarctic corticioid fungus megalocystidium leucoxanthum russulales basidiomycota and six related species |
| topic | basidiomycetes molecular systematics Russulales |
| url | https://plecevo.eu/article/24636/download/pdf/ |
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