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Phylogenetic relationships and evolution of photobiont associations in the Lobariaceae (Peltigerales, Lecanoromycetes, Ascomycota)

Högnabba, Filip; Stenroos, Soili and Thell, Arne LU (2009) In Bibliotheca Lichenologica. Diversity of Lichenology - Anniversary Volume. 100. p.157-187
Abstract
Phylogenetic relationships of the family Lobariaceae (Lecanoromycetes, Ascomycota) were reconstructed using direct optimization of nuclear ITS and LSU, and mitochondrial SSU rDNA sequences. Delimitations of the genera currently included in the family were investigated. Relationships of austral temperate taxa occurring in New Zealand, Australia and southern South America were studied in detail. Finally, we studied the evolution of the symbiotic associations found in the family which proved to be monophyletic. Sticta, with the exception of S. oroborealis, but including Dendriscocaulon dendroides, was found to be monophyletic while the genera Lobaria and Pseudocyphellaria turned out to be non-monophyletic. The status of Lobariella, and... (More)
Phylogenetic relationships of the family Lobariaceae (Lecanoromycetes, Ascomycota) were reconstructed using direct optimization of nuclear ITS and LSU, and mitochondrial SSU rDNA sequences. Delimitations of the genera currently included in the family were investigated. Relationships of austral temperate taxa occurring in New Zealand, Australia and southern South America were studied in detail. Finally, we studied the evolution of the symbiotic associations found in the family which proved to be monophyletic. Sticta, with the exception of S. oroborealis, but including Dendriscocaulon dendroides, was found to be monophyletic while the genera Lobaria and Pseudocyphellaria turned out to be non-monophyletic. The status of Lobariella, and Lobarina as independent genera was not supported. Relationships of southern temperate Sticta species indicate a common Gondwanan ancestor. In rest of the family, species from the austral temperate zone group together with more widespread species. The ancestor of the Lobariaceae was associated with cyanobacteria. Green algal photobionts have subsequently been acquired repeatedly, but also repeatedly lost within the family. The acquisition of green algae has not resulted in a complete loss of the cyanobacterial photobiont. The cyanobacterial symbioses therefore seem to be more stable than those with green algae. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
biogeography, cyanobacteria, Dendriscocaulon, direct optimization, lichens, molecular phylogeny, Lobaria, Pseudocyphellaria, Sticta, symbiosis.
in
Bibliotheca Lichenologica. Diversity of Lichenology - Anniversary Volume.
editor
Thell, Arne; Seaward, Mark R. D.; Feuerer, Tassilo; ; and
volume
100
pages
157 - 187
publisher
J. Cramer in der Gebrüder Borntraeger Verlagsbuchhandlung
ISSN
1436-1698
language
English
LU publication?
yes
id
4fb6890b-387f-4ae5-b91b-339803759112 (old id 1473651)
date added to LUP
2009-10-02 13:26:28
date last changed
2016-04-16 00:27:04
@inbook{4fb6890b-387f-4ae5-b91b-339803759112,
  abstract     = {Phylogenetic relationships of the family Lobariaceae (Lecanoromycetes, Ascomycota) were reconstructed using direct optimization of nuclear ITS and LSU, and mitochondrial SSU rDNA sequences. Delimitations of the genera currently included in the family were investigated. Relationships of austral temperate taxa occurring in New Zealand, Australia and southern South America were studied in detail. Finally, we studied the evolution of the symbiotic associations found in the family which proved to be monophyletic. Sticta, with the exception of S. oroborealis, but including Dendriscocaulon dendroides, was found to be monophyletic while the genera Lobaria and Pseudocyphellaria turned out to be non-monophyletic. The status of Lobariella, and Lobarina as independent genera was not supported. Relationships of southern temperate Sticta species indicate a common Gondwanan ancestor. In rest of the family, species from the austral temperate zone group together with more widespread species. The ancestor of the Lobariaceae was associated with cyanobacteria. Green algal photobionts have subsequently been acquired repeatedly, but also repeatedly lost within the family. The acquisition of green algae has not resulted in a complete loss of the cyanobacterial photobiont. The cyanobacterial symbioses therefore seem to be more stable than those with green algae.},
  author       = {Högnabba, Filip and Stenroos, Soili and Thell, Arne},
  editor       = {Thell, Arne and Seaward, Mark R. D. and Feuerer, Tassilo},
  issn         = {1436-1698},
  keyword      = {biogeography,cyanobacteria,Dendriscocaulon,direct optimization,lichens,molecular phylogeny,Lobaria,Pseudocyphellaria,Sticta,symbiosis.},
  language     = {eng},
  pages        = {157--187},
  publisher    = {J. Cramer in der Gebrüder Borntraeger Verlagsbuchhandlung},
  series       = {Bibliotheca Lichenologica. Diversity of Lichenology - Anniversary Volume.},
  title        = {Phylogenetic relationships and evolution of photobiont associations in the Lobariaceae (Peltigerales, Lecanoromycetes, Ascomycota)},
  volume       = {100},
  year         = {2009},
}