Generic characters of the simplest cyanoprokaryotes and

Komárek, Jiří; Kopeckỳ, J.; Cepák, Vladislav

doi:10.1016/s0181-1568(99)80015-4

Cited by 72 publications

(69 citation statements)

References 14 publications

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“…Typical Cyanothece, based on the type species C. aeruginosa, occupies yet another phylogenetic position and has a quite different cytology and morphology (cf. Koma´rek et al, 1999Koma´rek et al, , 2004. The taxonomic status of all of these must be confirmed.…”

Section: Discussionmentioning

confidence: 96%

Phylogenetic and taxonomic delimitation of the cyanobacterial genusAphanotheceand description ofAnathece gen. nov.

Komárek

Kaštovský

Jezberová

2011

European Journal of Phycology

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The traditional cyanobacterial form-genus Aphanothece was established according to morphological criteria in the middle of the 19th century by Na¨geli. It comprises unicellular morphotypes with oval or cylindrical cells arranged irregularly in amorphous mucilaginous colonies. Up to now, more than 80 morphospecies have been described, mostly from various freshwater aquatic habitats. The genus Aphanothece is heterogeneous in the traditional morphological concept as well as according to modern molecular criteria. Therefore, it must be divided into several taxonomic clusters. Generic characteristics, studied by a combination of molecular sequencing of 16S rDNA, ultrastructure, ecology and morphological variation, were investigated in selected strains and populations of type species of the traditional subgenera Aphanothece and Anathece. Distinct differences were found between both of these clusters in their position in the phylogenetic tree, ultrastructure of cells, morphology (size of cells), mucilage structure, life cycles and ecology. They must therefore be separated into two genera, according to both bacteriological and botanical criteria, and placed in different orders (Chroococcales and Synechococcales). Accordingly we describe Anathece, gen. et stat. nov., and transfer to it the type A. clathrata comb. nov. and six other species. Several other morphotypes, originally classified in the genus Aphanothece (but morphologically different from Aphanothece sensu stricto), correspond to the genera Cyanoaggregatum, Cyanogastrum, Gloeobacter, Gloeothece and Halothece. The closest relative of Anathece appears to be Cyanobium.

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Section: Discussionmentioning

confidence: 96%

Phylogenetic and taxonomic delimitation of the cyanobacterial genusAphanotheceand description ofAnathece gen. nov.

Komárek

Kaštovský

Jezberová

2011

European Journal of Phycology

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“…The chlorophyll a and carotenoid analyses were carried out by reversed phase high performance liquid chromatography (HPLC) on cultured cell extracts according to Koma´rek et al (1999). The Agilent HPLC system (Waldbronn, Germany) consisted of a Rheodyne valve (Rhonert Park), a reversed-phase column (5 mm particle size; 25 Â 0.4 cm; 250/4 RP 18 Lichrocart), a binary pump and an Agilent 1100 series diode array detector that allows VIS pigment absorption spectra recording during the chromatogram run.…”

Section: Lipid-soluble Pigment Analysesmentioning

confidence: 99%

Polyphasic characterization of a thermo-tolerant filamentous cyanobacterium isolated from the Euganean thermal muds (Padua, Italy)

Moro

Rascio

Rocca

et al. 2010

European Journal of Phycology

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In this paper we report a morphological, ultrastructural, biochemical and molecular (16S rRNA, 16S-23S ITS, rbcL and rpoC1 gene sequencing) survey on a very thin, non-heterocystous, filamentous cyanobacterium, isolated from mats covering several mud maturation tanks of the Euganean Thermal District, at temperatures ranging from 26 to 59 C. Denaturing gradient gel electrophoresis results, obtained using cyanobacterial primers targeting the 16S rRNA gene, confirmed that this cyanobacterium is one of the commonest taxa growing in the mud tanks. Comparison with Geitlerinema sp. PCC 8501 (¼Phormidium laminosum Gomont ex Gomont strain OH-1-p Cl 1), a thin thermobiotic species isolated from hot springs of Oregon and morphologically similar to our isolate, led us to hypothesize that the Euganean and PCC 8501 strains are either very similar sister species or ecotypes of the same species in a yet to be defined clade, clearly distinct within the paraphyletic Leptolyngbya group.

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“…However, Komárek et al (1999) have described phenotypic diacritical characters especially based on the ultrastructural study to differentiate these genera and tentatively transferred the present species to newly established genus (i.e., Cyanobacterium), which still awaiting for revision to come up with the simple morphological features for species delimitation. Cells generally single or in pairs immediately after division, irregularly arranged within the mucilaginous matrix, delicate, brownish green, globose, free fl oating or entangled within non-heterocytous fi lamentous forms; cell mass homogenous to slightly granular, sheath absent; cells 8.4-9 μm in diam., length of depressed cells in diad state ranges between 7.5 μm and 7.8 μm.…”

Section: Kakoijana Reserve Forest (Krf) Is Located Between 26mentioning

confidence: 97%

“…Other taxonomic papers such as, Komárek et al (1999), Kovalenko et al (1999) etc. were also referred in certain cases.…”

Section: Kakoijana Reserve Forest (Krf) Is Located Between 26mentioning

confidence: 99%

Biodiversity of epilithic cyanobacteria from freshwater streams of Kakoijana reserve forest, Assam, India

et al. 2007

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The biodiversity of epilithic cyanobacteria from one of the unexplored habitats of freshwater streams of Kakoijana reserve forest of Assam, India was estimated. This paper lists a total of 29 species representing 18 genera of 12 families and 4 orders as per recent system of classifi cation. Morphological descriptions, common habitats and distribution pattern were described for each species identifi ed that were represented systematically. Of these 29 species, 11 were unicellular, 9 non-heterocytous fi lamentous and 9 heterocytous fi lamentous forms. (A. nidulans, H. welwitschii, N. punctiforme, N. oryzae, O. pseudogeminata and P. ceylanicus), while 3 species (C. purpurea, L. boryana and L. calotrichoides) are new records for India. Six nitrogen fi xing heterocytous forms such as, C. epiphytica, C. scopulorum, N. humifusum, N. punctiforme, N. oryzae and S. millei, were common to the neighboring paddy fi elds.

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Generic characters of the simplest cyanoprokaryotes and

Cited by 72 publications

References 14 publications

Phylogenetic and taxonomic delimitation of the cyanobacterial genusAphanotheceand description ofAnathece gen. nov.

Phylogenetic and taxonomic delimitation of the cyanobacterial genusAphanotheceand description ofAnathece gen. nov.

Polyphasic characterization of a thermo-tolerant filamentous cyanobacterium isolated from the Euganean thermal muds (Padua, Italy)

Biodiversity of epilithic cyanobacteria from freshwater streams of Kakoijana reserve forest, Assam, India

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