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Statements

Subject Item
n2:RIV%2F60076658%3A12310%2F12%3A43884249%21RIV13-MSM-12310___
rdf:type
skos:Concept n9:Vysledek
dcterms:description
Taxonomic revision of the traditional polyphyletic cyanobacterial genus Phormidium is based on molecular sequencing combined with the definition of distinct, autapomorphic features. Several genera, clearly separated from each other (with genetic similarity lower than 95%), were already defined and separated from this widely conceived generic unit (Phormidesmis. Wilmottia and others). All of these new generic taxa are characterized by morphological markers also. We have studied another group of species (mainly the strains from salterns in Thailand), which was classified earlier in the genus Phormidium, but it represents an isolated cluster according to 16S rRNA gene sequencing and is characterized by specific uniform and morphological features. Because this whole group represents a phylogenetically and morphologically distinctly separated cluster (see Phormidium group I sensu Komarek & Anagnostidis 2005), we describe it as a special taxon Oxynema genus novum, in agreement with the Botanical Nomenclatoric Code (ICBN; McNeill & al. ed., 2007). The genetically most related clusters always have genetic similarity less than 93% and differ by distinct autapomorphic features. The filaments of members of Oxynema are cylindrical, narrowed and bent at the ends, commonly attenuated to a terminal elongated, more or less sharply pointed cells without calyptra. Thylakoids in cells are distinctly radially arranged, similarly as in the genera Microcoleus and %22Phormidium autumnale%22-type. The ecology of all members, which belong potentially to these types, is also similar: all species from this cluster were recorded from halophilic habitats, less frequently from thermal springs and soil biotopes with higher salt contents. Taxonomic revision of the traditional polyphyletic cyanobacterial genus Phormidium is based on molecular sequencing combined with the definition of distinct, autapomorphic features. Several genera, clearly separated from each other (with genetic similarity lower than 95%), were already defined and separated from this widely conceived generic unit (Phormidesmis. Wilmottia and others). All of these new generic taxa are characterized by morphological markers also. We have studied another group of species (mainly the strains from salterns in Thailand), which was classified earlier in the genus Phormidium, but it represents an isolated cluster according to 16S rRNA gene sequencing and is characterized by specific uniform and morphological features. Because this whole group represents a phylogenetically and morphologically distinctly separated cluster (see Phormidium group I sensu Komarek & Anagnostidis 2005), we describe it as a special taxon Oxynema genus novum, in agreement with the Botanical Nomenclatoric Code (ICBN; McNeill & al. ed., 2007). The genetically most related clusters always have genetic similarity less than 93% and differ by distinct autapomorphic features. The filaments of members of Oxynema are cylindrical, narrowed and bent at the ends, commonly attenuated to a terminal elongated, more or less sharply pointed cells without calyptra. Thylakoids in cells are distinctly radially arranged, similarly as in the genera Microcoleus and %22Phormidium autumnale%22-type. The ecology of all members, which belong potentially to these types, is also similar: all species from this cluster were recorded from halophilic habitats, less frequently from thermal springs and soil biotopes with higher salt contents.
dcterms:title
Oxynema, a new genus separated from the genus Phormidium (Cyanophyta) Oxynema, a new genus separated from the genus Phormidium (Cyanophyta)
skos:prefLabel
Oxynema, a new genus separated from the genus Phormidium (Cyanophyta) Oxynema, a new genus separated from the genus Phormidium (Cyanophyta)
skos:notation
RIV/60076658:12310/12:43884249!RIV13-MSM-12310___
n9:predkladatel
n10:orjk%3A12310
n3:aktivita
n12:V n12:Z
n3:aktivity
V, Z(AV0Z60050516)
n3:cisloPeriodika
1
n3:dodaniDat
n6:2013
n3:domaciTvurceVysledku
n4:4880218 n4:6712940
n3:druhVysledku
n14:J
n3:duvernostUdaju
n7:S
n3:entitaPredkladatele
n11:predkladatel
n3:idSjednocenehoVysledku
157564
n3:idVysledku
RIV/60076658:12310/12:43884249
n3:jazykVysledku
n18:eng
n3:klicovaSlova
taxonomic revisions; Phormidium; Oxynema gen. novum; molecular sequencing; halophilic habitats; ecology; Cyanobacteria; Cyanophyta
n3:klicoveSlovo
n5:taxonomic%20revisions n5:molecular%20sequencing n5:Oxynema%20gen.%20novum n5:halophilic%20habitats n5:Cyanophyta n5:ecology n5:Cyanobacteria n5:Phormidium
n3:kodStatuVydavatele
FR - Francouzská republika
n3:kontrolniKodProRIV
[5A2E5E2EA208]
n3:nazevZdroje
Cryptogamie/Algologie
n3:obor
n8:EF
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
5
n3:rokUplatneniVysledku
n6:2012
n3:svazekPeriodika
33
n3:tvurceVysledku
Komárek, Jiří Chatchawan, Thomrat Strunecký, Otakar Smarda, Jan Peerapornpisal, Yuwadee
n3:wos
000302759600004
n3:zamer
n19:AV0Z60050516
s:issn
0181-1568
s:numberOfPages
19
n17:organizacniJednotka
12310