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Hydrobiologia

, Volume 639, Issue 1, pp 231–243 | Cite as

Modern taxonomic revision of planktic nostocacean cyanobacteria: a short review of genera

  • Jiří Komárek
PHYTOPLANKTON Review paper

Abstract

The taxonomy of cyanobacteria has been substantially modified in the last few decades, particularly after application of modern ultrastructural and molecular methods. The group of heterocytous cyanobacteria (Nostocales) was found to be monophyletic, but the concept and content of different genera must be continually corrected and revised. The widespread introduction of the molecular approach (especially 16S rRNA gene sequencing) has confirmed almost all traditional genera based on distinct and morphologically recognizable type species, but indicated also broader diversity resulting in separation of more genetic and generic entities in several genera. The combination of molecular and phenotype analyses enables also a better and more objective definition of criteria for describing newly researched generic units, discovered from various habitats in the biosphere. Here, the nostocacean generic taxa are reviewed after recent necessary taxonomic corrections. Nostocacean cyanobacteria are filamentous, heterocytous, not branched and not polarized morphotypes, classified traditionally into one family (Nostocaceae). The main part of the review focuses on the genera containing planktic species.

Keywords

Cyanobacteria Taxonomy Ecology Molecular evaluation Phenotype characteristics Plankton Generic concept 

Notes

Acknowledgements

This work was supported by grants GA AVCR No. IAA600050704 and GA CR 206/08/0318. The author thanks J. Kaštovský, J. Komárková and E. Zapomělová for their help with the preparation of this presentation and manuscript. This study was presented as an invited paper at the Bat Sheva de Rothschild seminar on Phytoplankton in the Physical Environment—The 15th Workshop of the International Association of Phytoplankton Taxonomy and Ecology (IAP)—held in Ramot, Israel, November 23–30, 2008.

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.Institute of BotanyCzech Academy of SciencesTřeboňCzech Republic
  2. 2.Faculty of ScienceUniversity of South BohemiaČeské BudějoviceCzech Republic

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