POLYPHASIC CHARACTERIZATION OF DOLICHOSPERMUM SPP. AND SPHAEROSPERMOPSIS SPP. (NOSTOCALES,CYANOBACTERIA): MORPHOLOGY, 16S rRNA GENE SEQUENCES AND FATTY ACID AND SECONDARY METABOLITE PROFILES1 |
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| Authors: | Pavel Hrouzek Tomá? ?ezanka Jitka Jezberová Klára ?eháková Daniel Hisem Jaroslava Komárková |
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| Institution: | 1. Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovicky mlyn, CZ‐379 81 T?eboň, Czech Republic Institute of Physical Biology, Zámek 136, CZ‐37333 Nové Hrady, Czech Republic University of South Bohemia, Faculty of Science, Brani?ovská 31, CZ‐37005 ?eské Budějovice, Czech Republic;2. Institute of Microbiology, AS CR, Vídeňská 1083, CZ‐14220 Prague, Czech Republic;3. Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ‐37005 ?eské Budějovice, Czech Republic;4. Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ‐37005 ?eské Budějovice, Czech Republic Institute of Botany, AS CR, Dukelská 135, CZ‐37982 T?eboň, Czech Republic;5. Institute of Microbiology, AS CR, Department of Autotrophic Microorganisms, Opatovicky mlyn, CZ‐379 81 T?eboň, Czech Republic University of South Bohemia, Faculty of Science, Brani?ovská 31, CZ‐37005 ?eské Budějovice, Czech Republic |
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| Abstract: | The genera Dolichospermum (Ralfs ex Bornet et Flahault) Wacklin, L. Hoffm. et Komárek and Sphaerospermopsis Zapomělová, Jezberová, Hrouzek, Hisem, K. ?eháková et Komárk.‐Legn. represent a highly diversified group of planktonic cyanobacteria that have been recently separated from the traditional genus Anabaena Bory ex Bornet et Flahault. In this study, morphological diversity, phylogeny of the 16S rRNA gene, production of fatty acids, and secondary metabolite profiles were evaluated in 33 strains of 14 morphospecies isolated from the Czech Republic. Clustering of the strains based on 16S rRNA gene sequences corresponded to wider groups of species in terms of morphology. The overall secondary metabolite and fatty acid profiles, however, were not correlated to each other and neither were they correlated to the 16S rRNA phylogeny nor the morphology of the strains. Nevertheless, a minor part of the detected secondary metabolites (19% of all compounds) was present only in close relatives and can be thus considered as autapomorphic features. |
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| Keywords: | 16S rRNA gene Anabaena cyanobacteria Dolichospermum fatty acids morphology phytoplankton secondary metabolites Sphaerospermopsis taxonomy |
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