Heterolobosea is a group of mainly free-living amoebae, flagellates and amoeboflagellates closely related to Euglenozoa and Jakobida (supergroup Excavata). At least two heterolobosean lineages have reduced their mitochondria and live in low concentrations of oxygen (Psalteriomonadidae and extremely halophilic Pleurostomum). Moreover, some other presumably anaerobic species have been described in aerobic heteroloboseid genera, but their sequence data are still missing. The aim of this study is to recognize the diversity and phylogenetic position of both already described and novel non-hypersaline anaerobic heteroloboseans. We have isolated and cultivated 34 strains of free-living heterolobosean flagellates, amoebae and amoeboflagellates from freshwater, brackish and marine microoxic/anoxic habitats. 33 of these strains constitute a single clade (Psalteriomonadidae). We recognize 2 new genera and 3 new species. Phylogenetic analysis of SSU rDNA showed the genus Percolomonas is polyphyletic. The similar morphology of species formally placed within the genus Percolomonas is probably plesiomorphic. Finally, the marine strain PC4AM is morphologically unique and its morphology can not be compared with other heteroloboseans and eukaryotes. It is probably the most derived heterolobosean. Its cell structure...
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:297172 |
| Date | January 2011 |
| Creators | Pánek, Tomáš |
| Contributors | Čepička, Ivan, Oborník, Miroslav |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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