Phylogeny of cetrarioid lichens (Parmeliaceae) inferred from ITS and b-tubulin sequences,morphology, anatomy and secondary chemistry |
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Authors: | Email author" target="_blank">Arne?ThellEmail author Soili?Stenroos Tassilo?Feuerer Ingvar?K?rnefelt Leena?Myllys Jaakko?Hyv?nen |
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Institution: | 1.Botanical Museum, Department of the Biological Museums,Lund University,Lund,Sweden;2.Herbarium, Department of Biology,University of Turku,Turku,Finland;3.Institut für Allgemeine Botanik und Botanischer Garten,Universit?t Hamburg,Hamburg,Germany;4.Department of the Biological Museums,Lund University,Lund,Sweden;5.Division of Systematic Biology,University of Helsinki,Helsinki,Finland |
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Abstract: | Phylogenetic relationships within the family Parmeliaceae (lichenized ascomycetes) with emphasis on the heterogeneous group
of cetrarioid lichens are reconstructed. The results are based on cladistic analyses of DNA-sequences, morphological and chemical
data. Almost all currently recognized cetrarioid genera were included in the analyses together with parmelioid and alectorioid
members of the presumably monophyletic family Parmeliaceae. We tried to sample taxonomic diversity of the family as widely
as possible. The ITS1-5.8S-ITS2 region of the rDNA and a partial β-tubulin gene from 126 samples representing 82 species were
analysed. Cetrarioid lichens were identified as a monophyletic group, supported by both ITS and β-tubulin characters. This
group was reanalysed using 47 morphological, anatomical and secondary chemistry characters combined with the DNA data matrix.
ITS and β-tubulin sequences provide congruent information, and a clear correlation between DNA-data and conidial shape is
observed. The current taxonomy of the cetrarioid lichens is discussed and compared with the phylogenetic trees obtained here.
A comprehensive study of the phylogeography of some bipolar or subcosmopolitic species with representatives from both hemispheres
was performed. Cetraria aculeata is the only taxon where correlation between DNA-data and geographic origin is observed. |
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