Molecular Diversity of Eucaryotic Picoalgae from Three Lakes in Switzerland

The diversity of eucaryotic picoalgae in three Swiss lakes was characterized by light microscopy and these observations were compared with analyses of SSU rDNA sequences. The phylogenetic analyses suggested that seven of the eight investigated strains were either related to Choricystis (Trebouxiophy...

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Bibliographic Details
Published in:International review of hydrobiology. 2002-01, Vol.87 (1), p.1-10
Main Authors: Hepperle, Dominik, Schlegel, Ines
Format: Article
Language:English
Subjects:
18S rDNA phylogeny
Algae
autotrophic picoplankton
biodiversity
Biological and medical sciences
Chlorella
Choricystis
Freshwater
Fundamental and applied biological sciences. Psychology
Mychonastes
Myconastes
Plant cytology, morphology, systematics, chorology and evolution
Pseudodictyosphaerium
Switzerland
Thallophyta
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Summary:The diversity of eucaryotic picoalgae in three Swiss lakes was characterized by light microscopy and these observations were compared with analyses of SSU rDNA sequences. The phylogenetic analyses suggested that seven of the eight investigated strains were either related to Choricystis (Trebouxiophyceae) or Mychonastes (Chlorophyceae). Light microscopic analyses revealed that strains belonging to these two lineages could not be discriminated using morphological characters such as cell morphology, cell shape or growth habit. A single strain which was characterized by the presence of pyrenoids turned out to be closely related to Chlorella sp. The common opinion that eucaryotic freshwater picoalgae are either related to Nannochloris or Chlorella cannot be hold any longer.
ISSN:1434-2944
1522-2632
DOI:10.1002/1522-2632(200201)87:1<1::AID-IROH1>3.0.CO;2-A