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TAXONOMIC AND ECOLOGICAL CHARACTERIZATION OF STOMATOCYSTS OF SPUMELLA-LIKE FLAGELLATES (CHRYSOPHYCEAE)1

2010; Wiley; Volume: 46; Issue: 5 Linguagem: Inglês

10.1111/j.1529-8817.2010.00892.x

1529-8817

Barbara M. Findenig, Antonis Chatzinotas, Jens Boenigk,

Coastal wetland ecosystem dynamics

Journal of PhycologyVolume 46, Issue 5 p. 868-881 TAXONOMIC AND ECOLOGICAL CHARACTERIZATION OF STOMATOCYSTS OF SPUMELLA-LIKE FLAGELLATES (CHRYSOPHYCEAE)† Barbara M. Findenig, Barbara M. Findenig Institute for Limnology, Austrian Academy of Sciences, Mondseestrasse 9, 5310 Mondsee, AustriaSearch for more papers by this authorAntonis Chatzinotas, Antonis Chatzinotas UFZ, Helmholtz Centre for Environmental Research, Department of Environmental Microbiology, Permoserstrasse 15, D-04318 Leipzig, GermanySearch for more papers by this authorJens Boenigk, Jens Boenigk Institute for Limnology, Austrian Academy of Sciences, Mondseestrasse 9, 5310 Mondsee, Austria Author for correspondence: e-mail [email protected].Search for more papers by this author Barbara M. Findenig, Barbara M. Findenig Institute for Limnology, Austrian Academy of Sciences, Mondseestrasse 9, 5310 Mondsee, AustriaSearch for more papers by this authorAntonis Chatzinotas, Antonis Chatzinotas UFZ, Helmholtz Centre for Environmental Research, Department of Environmental Microbiology, Permoserstrasse 15, D-04318 Leipzig, GermanySearch for more papers by this authorJens Boenigk, Jens Boenigk Institute for Limnology, Austrian Academy of Sciences, Mondseestrasse 9, 5310 Mondsee, Austria Author for correspondence: e-mail [email protected].Search for more papers by this author First published: 22 September 2010 https://doi.org/10.1111/j.1529-8817.2010.00892.xCitations: 30 † Received 17 June 2009. Accepted 28 January 2010. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Cyst formation is a characteristic feature of chrysophytes. Cyst morphology is used for species identification, and the distribution of cysts in sediment cores is used to infer past climate conditions. The affiliation of stomatocyst demes with morphospecies, however, remains unclear. Here, we investigated the taxonomic and ecological value of the occurrence of cyst formation and cyst morphology to differentiate chrysophyte flagellates of the Spumella-morphodeme, which are among the numerically dominant eukaryotes in many aquatic and terrestrial habitats. In the investigated 90 strains of Spumella-like flagellates, we observed encystment only in six strains despite the broad range of temperature regimes and chemical factors tested. Spumella-like flagellates that produce cysts are affiliated with different subclusters within the Chrysophyceae and are closely related to strains for which cyst formation is not known. The occurrence of cyst formation is therefore unsuitable as a taxonomic criterion. Cyst morphology allows for differentiating some strains even though distinctly different strains may have similar or even identical-looking cyst demes. Despite considerable changes in cell size of the vegetative cells related to the nutritional status, the size of the cysts was always larger than that of a typical vegetative cell. Cysts were colorless and had no chromatophores, and some granula were visible in the light microscope. None of the investigated strains and none of the so far published cyst descriptions of Spumella spp. entirely seem to match the cyst description of the generic type strain. However, taking methodological bias between light and electron microscopical investigations into account, the cysts 199hm (this paper) and N1846 (Yubuki et al. 2008) seem to correspond to the cyst of the generic type strain. We propose the strain 199hm as epitype for Spumella vulgaris Cienkowsky; we further describe Spumella rivalis Boenigk et Findenig sp. nov., Pedospumella encystans Boenigk et Findenig gen. et sp. nov., and Poteriospumella lacustris Boenigk et Findenig gen. et sp. nov. Citing Literature Volume46, Issue5October 2010Pages 868-881 RelatedInformation