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References

  • Costa J-L, Paulsrud P, Lindblad P. 1999. Cyanobiont diversity within coralloid roots of selected cycad species. FEMS Microbiology Ecology 28: 8591.
  • Costa J-L, Paulsrud P, Lindblad P. 2002. The cyanobacterial tRNALeu (UAA) intron: evolutionary patterns in a genetic marker. Molecular Biology and Evolution 19: 850857.
  • Costa J-L, Paulsrud P, Rikkinen J, Lindblad P. 2001. Genetic diversity of Nostoc symbionts endophytically associated with two bryophyte species. Applied and Environmental Microbiology 67: 43934396.
  • Green TGA, Schroeter B, Sancho LG. 1999. Plant Life in Antarctica. In: PugnaireFI, ValladaresF, eds. Handbook of functional plant ecology. New York, NY, USA: Marcel Dekker, 495543.
  • Kimura MA. 1980. A simple method for estimating evolutionary rates of base substitutions through comparative studies of nucleotide sequences. Journal of Molecular Evolution 16: 111120.
  • Lamb IM. 1947. A monograph of the lichen genus Placopsis Nyl. Lilloa 13: 151288.
  • Linke K, Hemmerich J, Lumbsch HT. 2003. Identification of Nostoc cyanobionts in some Peltigera species using a group I intron in the tRNALeu gene. Bibliotheca Lichenologica 86: 113118.
  • Oksanen I, Lohtander K, Paulsrud P, Rikkinen J. 2002. A molecular approach to cyanobacterial diversity in a rock-pool community involving gelatinous lichens and free-living Nostoc colonies. Annales Botanici Fennici 39: 9399.
  • Øvstedal DO, Lewis Smith RI. 2001. Lichens of Antarctica and South Georgia. Cambridge, UK: Cambridge University Press.
  • Page RDM. 1996. treeview: An application to display phylogenetic trees on personal computers. Computer Applied Biosciences 12: 357358.
  • Paquin B, Kathe SD, Nierzwicki-Bauer SA, Shub DA. 1997. Origin and evolution of group I introns in cyanobacterial tRNA genes. Journal of Bacteriology 179: 67986806.
  • Paulsrud P, Lindblad P. 1998. Sequence variation of the tRNALeu intron as a marker for genetic diversity and specificity of symbiotic cyanobacteria in some lichens. Applied Environmental Microbiology 64: 310315.
  • Paulsrud P, Rikkinen J, Lindblad P. 1998. Cyanobiont specificity in some Nostoc-containing lichens and in a Peltigera aphthosa photosymbiodeme. New Phytologist 139: 517524.
  • Paulsrud P, Rikkinen J, Lindblad P. 2000. Spatial patterns of photobiont diversity in some Nostoc-containing lichens. New Phytologist 146: 291299.
  • Paulsrud P, Rikkinen J, Lindblad P. 2001. Field investigations on cyanobacterial specificity in Peltigera aphthosa. New Phytologist 152: 117123.
  • Pintado A, Sancho LG, Valladares F. 2001. The influence of microclimate on the composition of lichen communities along an altitudinal gradient in the maritime Antarctic. Symbiosis 31: 6984.
  • Potts M. 2000. Nostoc. In: WhittonBA, PottsM, eds. The ecology of cyanobacteria. Dordrecht, The Netherlands: Kluwer Academic Publishers, 465504.
  • Rikkinen J, Oksanen I, Lohtander K. 2002. Lichen guilds share related cyanobacterial symbionts. Science 297: 357.
  • Romeike J, Friedl T, Helms G, Ott S. 2002. Genetic diversity of algal and fungal partners in four species of Umbilicaria (lichenized ascomycetes) along a transect of the Antarctic peninsula. Molecular Biology and Evolution 19: 12091217.
  • Rudi K, Jakobsen KS. 1997. Cyanobacterial tRNALeu (UAA) group I introns have polyphyletic origin. FEMS Microbiological Letters 156: 293298.
  • Rudi K, Jakobsen KS. 1999. Complex evolutionary patters of tRNALeu UAA group I introns in cyanobacterial radiation. Journal of Bacteriology 181: 34453451.
  • Rudi K, Fossheim T, Jakobsen KS. 2002. Nested evolution of a tRNA (Leu) (UAA) group I intron by both horizontal intron transfer and recombination of the entire tRNA locus. Journal of Bacteriology 184: 666671.
  • Saitou N, Nei M. 1987. The neighbor-joining method: a new method for reconstructing phylogenetic trees. Molecular Biology and Evolution 4: 406425.
  • Schroeter B, Kappen L, Green TGA, Seppelt RD. 1997. Lichens and the Antarctic environment: effects of temperature and water availability on photosynthesis. In: LyonsWB, Howard-WilliamsC, HawesI, eds. Ecosystem processes in Antarctic ice-free landscapes. Rotterdam, The Netherlands: A A Balkema, 103117.
  • Smith RIL. 1995. Colonization by lichens and the development of lichen-dominated communities in the maritime Antarctic. Lichenologist 27: 473483.
  • Summerfield TC, Galloway DJ, Eaton-Rye JJ. 2002. Species of cyanolichens from Pseudocyphellaria with indistinguishable ITS sequences have different photobionts. New Phytologist 155: 121129.
  • Swofford DL. 1998. Paup*. phylogenetic analysis using parsimony (*and other methods) , Version 4. Sunderland, MA, USA: Sinauer Associates.
  • Thompson JD, Higgins DG, Gibson TJ. 1994. clustal w: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choice. Nucleic Acids Research 22: 46734680.
  • Tschermak-Woess E. 1988. The algal partner. In: GalunM, ed. CRC handbook of lichenology, Vol. I. Boca Raton, FL, USA: CRC Press, 3992.
  • Vincent WF. 2000. Cyanobacterial dominance in the polar regions. In: Whitton, BA, Potts, M, eds. The ecology of cyanobacteria. Dordrecht, The Netherlands: Kluwer Academic Publishers, 321340.
  • West NJ, Adams DG. 1997. Phenotypic and genotypic comparison of symbiotic and free-living cyanobacteria from a single field site. Applied and Environmental Microbiology 63: 44794484.