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Statements

Subject Item
n2:RIV%2F61388971%3A_____%2F14%3A00429671%21RIV15-GA0-61388971
rdf:type
skos:Concept n17:Vysledek
dcterms:description
The taxonomy of cyanobacteria currently faces the challenge of overhauling the traditional system to better reflect the results of phylogenetic analyses. In the present study, we assessed the phylogenetic position, morphological variability, ability to produce the toxin nodularin, and source habitat of 17 benthic and soil isolates of Nodularia. A combined analysis of two loci (partial 16S rRNA gene and rbcLX region) confirmed the genus as a monophyletic unit and the close relationship of its members. However, the taxonomic resolution at the subgeneric level was extremely problematic. The phylogenetic clustering did not show any reasonable congruence with either morphological or ecological features commonly used to separate taxa in heterocytous cyanobacteria. Despite the near phylogenetic similarity of planktonic, benthic and soil Nodularia strains, we did not find any new nodularin-producing strains among the non-planktonic isolates. The relatively low variability in conserved molecular markers within the genus Nodularia exemplifies the limitations of the currently accepted taxonomic workflow and polyphasic approach. Elucidation of mechanisms that drive the phenotypic variability in such groups presents a major challenge in cyanobacterial research. The taxonomy of cyanobacteria currently faces the challenge of overhauling the traditional system to better reflect the results of phylogenetic analyses. In the present study, we assessed the phylogenetic position, morphological variability, ability to produce the toxin nodularin, and source habitat of 17 benthic and soil isolates of Nodularia. A combined analysis of two loci (partial 16S rRNA gene and rbcLX region) confirmed the genus as a monophyletic unit and the close relationship of its members. However, the taxonomic resolution at the subgeneric level was extremely problematic. The phylogenetic clustering did not show any reasonable congruence with either morphological or ecological features commonly used to separate taxa in heterocytous cyanobacteria. Despite the near phylogenetic similarity of planktonic, benthic and soil Nodularia strains, we did not find any new nodularin-producing strains among the non-planktonic isolates. The relatively low variability in conserved molecular markers within the genus Nodularia exemplifies the limitations of the currently accepted taxonomic workflow and polyphasic approach. Elucidation of mechanisms that drive the phenotypic variability in such groups presents a major challenge in cyanobacterial research.
dcterms:title
Nodularia (Cyanobacteria, Nostocaceae): a phylogenetically uniform genus with variable phenotypes Nodularia (Cyanobacteria, Nostocaceae): a phylogenetically uniform genus with variable phenotypes
skos:prefLabel
Nodularia (Cyanobacteria, Nostocaceae): a phylogenetically uniform genus with variable phenotypes Nodularia (Cyanobacteria, Nostocaceae): a phylogenetically uniform genus with variable phenotypes
skos:notation
RIV/61388971:_____/14:00429671!RIV15-GA0-61388971
n3:aktivita
n10:I n10:P
n3:aktivity
I, P(ED2.1.00/03.0110), P(GA14-18067S)
n3:cisloPeriodika
3
n3:dodaniDat
n15:2015
n3:domaciTvurceVysledku
n16:5093279
n3:druhVysledku
n14:J
n3:duvernostUdaju
n9:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
32688
n3:idVysledku
RIV/61388971:_____/14:00429671
n3:jazykVysledku
n12:eng
n3:klicovaSlova
cyanobacteria; Nodularia; taxonomy
n3:klicoveSlovo
n5:Nodularia n5:cyanobacteria n5:taxonomy
n3:kodStatuVydavatele
NZ - Nový Zéland
n3:kontrolniKodProRIV
[33D26B429A0C]
n3:nazevZdroje
Phytotaxa
n3:obor
n11:EF
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
6
n3:projekt
n7:ED2.1.00%2F03.0110 n7:GA14-18067S
n3:rokUplatneniVysledku
n15:2014
n3:svazekPeriodika
172
n3:tvurceVysledku
Řeháková, Klára Lukešová, Alena Bernardová, Kateřina Zapomělová, Eliška Hrouzek, Pavel Mareš, Jan
n3:wos
000337497900004
s:issn
1179-3155
s:numberOfPages
12
n13:doi
10.11646/phytotaxa.172.3.4