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Cyanobacteria associated with biofilms of tufa stromatolites in the German creek Westerhöfer
Hodačová, Alena ; Eliáš, Marek (advisor) ; Řeháková, Klára (referee)
This diploma thesis is focused on cyanobacteria which occur in the biofilm of the tufa stromatolite covering the ground of Westerhöfer creek in Lower Saxony in Germany. A study of this creek has already been written (ARP ET AL., 2010) but only for one sampling site (WB 5), with six unidentified phylotypes of nine obtained as the result of that study. One of the aims of my diploma thesis is to identify at least some of them, and to show other groups occurring there. The results of my diploma thesis are divided into two parts. Part One - the morphology of isolates obtained from raw cultures of all sampling sites in the creek. Part Two - a phylogenetical study of 16S rDNA of the isolates and the sequences obtained by cloning of environmental 16S rDNA. The clones were obtained from Kathrin I. Mohr (who worked on the same project in the EPSAG laboratory and who did the cloning immediately after sampling). I also did cloning, but after 2.5 months of cultivation. In the morphological part, I identified 11 morphotypes, corresponding to established genera Aphanothece, Synechococcus, Cyanothece/Gloeothece, Leptolyngbya, Pseudanabaena, Limnothrix, Plectonema, Phormidium, Tolypothrix, and Nostoc. Two of isolates could not be assigned to any morphotype. It is isolate AH 5 and isolate AH 35. In the phylogenetical part I...
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Cyanobacteria associated with biofilms of tufa stromatolites in the German creek Westerhöfer
Hodačová, Alena ; Eliáš, Marek (advisor) ; Řeháková, Klára (referee)
This diploma thesis is focused on cyanobacteria which occur in the biofilm of the tufa stromatolite covering the ground of Westerhöfer creek in Lower Saxony in Germany. A study of this creek has already been written (ARP ET AL., 2010) but only for one sampling site (WB 5), with six unidentified phylotypes of nine obtained as the result of that study. One of the aims of my diploma thesis is to identify at least some of them, and to show other groups occurring there. The results of my diploma thesis are divided into two parts. Part One - the morphology of isolates obtained from raw cultures of all sampling sites in the creek. Part Two - a phylogenetical study of 16S rDNA of the isolates and the sequences obtained by cloning of environmental 16S rDNA. The clones were obtained from Kathrin I. Mohr (who worked on the same project in the EPSAG laboratory and who did the cloning immediately after sampling). I also did cloning, but after 2.5 months of cultivation. In the morphological part, I identified 11 morphotypes, corresponding to established genera Aphanothece, Synechococcus, Cyanothece/Gloeothece, Leptolyngbya, Pseudanabaena, Limnothrix, Plectonema, Phormidium, Tolypothrix, and Nostoc. Two of isolates could not be assigned to any morphotype. It is isolate AH 5 and isolate AH 35. In the phylogenetical part I...
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