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High selectivity in symbiotic associations of lichenized ascomycetes and cyanobacteria

Stenroos, S ; Högnabba, F ; Myllys, L ; Hyvönen, J and Thell, Arne LU (2006) In Cladistics 22(3). p.230-238
Abstract
The selectivity of mycobionts and cyanobionts in lichen symbioses were examined. We analyzed symbiotic cyanobionts, collected from different sample sites, and compared them to free-living cyanobacteria Nostoc. Cyanobionts were obtained from lichens assigned to the genera Pseudocyphellaria and Sticta, in particular. Multiple gene loci were screened and direct optimization was used in the phylogenetic analyses. We show that many lichen fungi are strongly selective towards their cyanobionts. Lichenized ascomycetes seem to be able to identify and choose a specific strain, species or a species group of Nostoc with which to associate. The present analyses also suggest that some of the Nostoc taxa may be specialized in symbiotic life with only... (More)
The selectivity of mycobionts and cyanobionts in lichen symbioses were examined. We analyzed symbiotic cyanobionts, collected from different sample sites, and compared them to free-living cyanobacteria Nostoc. Cyanobionts were obtained from lichens assigned to the genera Pseudocyphellaria and Sticta, in particular. Multiple gene loci were screened and direct optimization was used in the phylogenetic analyses. We show that many lichen fungi are strongly selective towards their cyanobionts. Lichenized ascomycetes seem to be able to identify and choose a specific strain, species or a species group of Nostoc with which to associate. The present analyses also suggest that some of the Nostoc taxa may be specialized in symbiotic life with only lichenized ascomycetes. Despite the selectivity observed in fungi, there appears to be no coevolution between the partners. We have also discussed the problems of using the tRNA(Leu) intron as a marker in phylogenetic analyses. (Less)
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Contribution to journal
publication status
published
subject
in
Cladistics
volume
22
issue
3
pages
230 - 238
publisher
Wiley-Blackwell
external identifiers
  • wos:000239154000003
  • scopus:33745032563
ISSN
1096-0031
language
English
LU publication?
yes
id
cd6a0647-a283-49e7-8047-1fc3e737c5d1 (old id 165343)
alternative location
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1096-0031.2006.00101.x
date added to LUP
2016-04-01 12:17:01
date last changed
2020-12-15 02:01:00
@article{cd6a0647-a283-49e7-8047-1fc3e737c5d1,
  abstract     = {The selectivity of mycobionts and cyanobionts in lichen symbioses were examined. We analyzed symbiotic cyanobionts, collected from different sample sites, and compared them to free-living cyanobacteria Nostoc. Cyanobionts were obtained from lichens assigned to the genera Pseudocyphellaria and Sticta, in particular. Multiple gene loci were screened and direct optimization was used in the phylogenetic analyses. We show that many lichen fungi are strongly selective towards their cyanobionts. Lichenized ascomycetes seem to be able to identify and choose a specific strain, species or a species group of Nostoc with which to associate. The present analyses also suggest that some of the Nostoc taxa may be specialized in symbiotic life with only lichenized ascomycetes. Despite the selectivity observed in fungi, there appears to be no coevolution between the partners. We have also discussed the problems of using the tRNA(Leu) intron as a marker in phylogenetic analyses.},
  author       = {Stenroos, S and Högnabba, F and Myllys, L and Hyvönen, J and Thell, Arne},
  issn         = {1096-0031},
  language     = {eng},
  number       = {3},
  pages        = {230--238},
  publisher    = {Wiley-Blackwell},
  series       = {Cladistics},
  title        = {High selectivity in symbiotic associations of lichenized ascomycetes and cyanobacteria},
  url          = {http://www.blackwell-synergy.com/doi/abs/10.1111/j.1096-0031.2006.00101.x},
  volume       = {22},
  year         = {2006},
}