Cytomorphological characters supporting the taxonomic validity ofCyanothece (Cyanoprokaryota) |
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Authors: | Jiří Komárek Vladislav Cepák |
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Affiliation: | (1) Faculty of Biological Sciences, University of South Bohemia, Braniovská 31, CZ-37005 eské Budjovice, Czech Republic;(2) Department of Plant Physiology and Anatomy, Masaryk University, Faculty of Sciences, Kotláská 2, CZ-61137 Brno, Czech Republic |
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Abstract: | The fine structure of the type species of the genusCyanotheceKomárek 1976,C. aeruginosa, is described and compared with the main cytological characteristics of morphologically related members of the generaCyanobium, Cyanobacterium andSynechococcus. Several morphological features, such as cell walls with thick outer layers containing a special type of vesicles, position of thylakoids, keritomy (net-like appearance of protoplast caused by arrangement of thylakoids, net-like nucleoids and/or by tendency to form intrathylakoidal spaces) and a special structure of mucilaginous envelopes were found to be characteristic of this genus, supporting its separate position among coccal cyanoprokaryotes (cyanobacteria, cyanophytes). The taxonomic significance of ultrastructural features in all mentioned genera is discussed. |
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Keywords: | Cyanophyta Cyanobacteria Cyanothece Synechococcus Cyanobium Ultrastructure nucleoids taxonomy |
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