PHYLOGENYOF <i>CHLOROMONAS</i> (CHLOROPHYCEAE): A STUDY OF 185 RIBOSOMAL RNA GENE SEQUENCES<sup>1</sup>
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<jats:title>ABSTRACT</jats:title><jats:p>The unicellular, biflagellate genus <jats:italic>Chloromonas</jats:italic> differs from its ally, Chlamydomonas, primarily by the absence of pyrenoids in the vegetative stage of the former. As with most green flagellate genera, little is known about phylogenetic affinities within and among <jats:italic>Chloromonas</jats:italic> species. Phylogenetic analyses of nuclear‐encoded small‐subunit ribosomal RNA gene sequences demonstrate that a sampling of five <jats:italic>Chloromonas</jats:italic> taxa, obtained from major culture collections, do not form a monophyletic group. However, only three of these isolates, Chloromonas clathrata, Chloromonas serbinowi, and <jats:italic>Chloromonas rosae,</jats:italic> are diagnosable morphologically as <jats:italic>Chloromonas</jats:italic> species by the absence of a pyrenoid in the vegetative stage. The three diagnosable <jats:italic>Chloromonas</jats:italic> taxa form an alliance with two pyrenoid‐bearing chlamydomonads, Chlamydomonas augustae and <jats:italic>Chlamydomonas macrostellata.</jats:italic> With the exception of <jats:italic>Chloromonas serbinowi,</jats:italic> which represents the basal lineage within the clade, each of the diagnosable <jats:italic>Chloromonas</jats:italic> taxa and their pyrenoidbearing <jats:italic>Chlamydomonas</jats:italic> allies were isolated originally from mountain soils, snow, or cold peat. These observations suggest that habitat, independent of pyrenoid status, may be most closely linked to the natural history of this clade of chlamydomonad flagellates.</jats:p>
収録刊行物
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- Journal of Phycology
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Journal of Phycology 33 (2), 286-293, 1997-04
Wiley
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詳細情報 詳細情報について
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- CRID
- 1363388844469386880
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- NII論文ID
- 30014850770
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- ISSN
- 15298817
- 00223646
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