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Träfflista för sökning "WFRF:(Saag Lauri) ;pers:(Thell Arne)"

Search: WFRF:(Saag Lauri) > Thell Arne

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1.
  • Divakar, Pradeep K., et al. (author)
  • Evolution of complex symbiotic relationships in a morphologically derived family of lichen-forming fungi
  • 2015
  • In: New Phytologist. - : Wiley. - 0028-646X .- 1469-8137. ; 208:4, s. 1217-1226
  • Journal article (peer-reviewed)abstract
    • We studied the evolutionary history of the Parmeliaceae (Lecanoromycetes, Ascomycota), one of the largest families of lichen-forming fungi with complex and variable morphologies, also including several lichenicolous fungi. We assembled a six-locus data set including nuclear, mitochondrial and low-copy protein-coding genes from 293 operational taxonomic units (OTUs). The lichenicolous lifestyle originated independently three times in lichenized ancestors within Parmeliaceae, and a new generic name is introduced for one of these fungi. In all cases, the independent origins occurred c. 24 million yr ago. Further, we show that the Paleocene, Eocene and Oligocene were key periods when diversification of major lineages within Parmeliaceae occurred, with subsequent radiations occurring primarily during the Oligocene and Miocene. Our phylogenetic hypothesis supports the independent origin of lichenicolous fungi associated with climatic shifts at the Oligocene-Miocene boundary. Moreover, diversification bursts at different times may be crucial factors driving the diversification of Parmeliaceae. Additionally, our study provides novel insight into evolutionary relationships in this large and diverse family of lichen-forming ascomycetes.
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2.
  • Mark, Kristiina, et al. (author)
  • Testing morphology-based delimitation of Vulpicida juniperinus and V. tubulosus (Parmeliaceae) using three molecular markers.
  • 2012
  • In: Lichenologist. - 0024-2829. ; 44:6, s. 757-772
  • Journal article (peer-reviewed)abstract
    • The delimitation of two morphologically similar and not easily separable Vulpicida species,V. juniperinus and V. tubulosus, is analyzed using nuclear ITS and Mcm7, and mitochondrial SSU DNA sequences. Seventy-nine Vulpicida specimens, most from the two focal taxa, are included in the three-locus gene tree. The results from Bayesian and parsimony analyses are presented. There are strong conflicts between the single locus gene trees. Vulpicida juniperinus and V. tubulosus are divided into two clearly distinguished groups in the ITS and concatenated B/MCMC tree. However, these species are mixed in both clades, appearing polyphyletic. Currently accepted V. juniperinus and V. tubulosus are not distinct according to the loci studied. Vulpicida pinastri appears monophyletic based on the available sequences.
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3.
  • Saag, Andres, et al. (author)
  • Third world list of cetrarioid lichens: A databased tool for documentation of nomenclatural data - lessons learned
  • 2013
  • In: Taxon. - : Wiley. - 0040-0262. ; 62:3, s. 591-603
  • Journal article (peer-reviewed)abstract
    • The third version of the world list of cetrarioid lichens contains 572 names representing 149 accepted species. It is presented in a new, electronical form, based on a FileMaker-powered database, allowing users to view data in different sets and to perform searches. Type information is added for most of the names, and new information regarding the phylogenetic status of accepted taxa is introduced. Five global taxonomic databases (Catalogue of Life, Encyclopedia of Life, Index Fungorum, LIAS, MycoBank) are compared by scanning the availability of mainly nomenclatural data of 30 selected cetrarioid names (10 accepted names, 10 homotypic and 10 heterotypic synonyms); the significance of digital web resources is discussed.
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  • Result 1-4 of 4

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