Base composition of DNA from symbiotic dinoflagellates: a tool for phylogenetic classification

DNA of eight endosymbiotic dinoflagellates (zooxanthellae) from seven different host species has been analyzed as to its thermal characteristics and base composition by means of spectrophotometry and high performance liquid chromatography. All algae under investigation contain both methylcytosine an...

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Bibliographic Details
Published in:Archives of microbiology 1988-04, Vol.149 (6), p.515-520
Main Authors: BLANK, R. J, HUSS, V. A. R, KERSTEN, W
Format: Article
Language:English
Subjects:
Algae
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Plant cytology, morphology, systematics, chorology and evolution
Thallophyta
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Summary:DNA of eight endosymbiotic dinoflagellates (zooxanthellae) from seven different host species has been analyzed as to its thermal characteristics and base composition by means of spectrophotometry and high performance liquid chromatography. All algae under investigation contain both methylcytosine and hydroxymethyluracil in addition to the bases typical of nuclear DNA. As a result, melting temperatures are decreased, suggesting lower contents of guanine plus cytosine than actually present. True percentages of guanine plus cytosine plus methylcytosine range from about 43 to 54 mol%. They are unique for the symbionts from different hosts, indicating phylogenetic separation of the taxa comprised within the genus Symbiodinium .
ISSN:0302-8933
1432-072X
DOI:10.1007/BF00446754