Utility of 16S-23S ITS sequence and secondary structure for recognition of intrageneric and intergeneric limits within cyanobacterial taxa: Leptolyngbya corticola sp. nov. (Pseudanabaenaceae, Cyanobacteria)

Johansen, Jeffrey R.; Kováčik, Ľubomír; Casamatta, Dale A.; Iková, Karolina Fuc; Kaštovský, Jan

doi:10.1127/0029-5035/2011/0092-0283

Cited by 110 publications

(105 citation statements)

References 35 publications

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“…In previous papers, we have found a high level of conservation in the secondary structure of the D1-D1' helix and Box-B helix among Pseudanabaenales JoHansen et al 2011;BohunicKá et al, this issue), the Phormidiales (siegesmund et al 2008), and selected Nostocales (ŘeHáKová et al 2007;LuKešová et al 2009). We suspect that with more taxon sampling, we would begin to see similar patterns in the Rivulariaceae and Scytonemataceae.…”

Section: Discussionmentioning

confidence: 78%

Scytonematopsis contorta sp. nov. (Nostocales), a new species from the Hawaiian Islands.

Vaccarino¹,

Johansen²

2011

Fottea

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Scytonematopsis KiseleVa is a poorly known cyanobacterial genus with a widespread, mostly tropical distribution. A new species, S. contorta, is described from the Hawaiian Island of Oahu based on morphological and molecular evidence. The new species was found growing on rock in damp aerial habitats proximal to streams and waterfalls. It differs in several regards to the other 14 species, in particular in its pronounced ability to produce a spirally contorted trichome within a single filament. The phylogenetic placement of the genus is uncertain. It is associated with both Rivularia and Calothrix species in the Rivulariaceae, and is distant from the Scytonemataceae, where it has traditionally been placed. However, the relationship of these taxa is unresolved, as there was very little support for the deeper nodes of the phylogeny.

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Section: Discussionmentioning

confidence: 78%

Scytonematopsis contorta sp. nov. (Nostocales), a new species from the Hawaiian Islands.

Vaccarino¹,

Johansen²

2011

Fottea

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“…Comparison of the secondary structures of 16S-23S ITS is of taxonomic importance according to Johansen et al (2011). To illustrate specificity and the rate of relatedness of the different morphologically similar taxa included in our study, we provide the two most conserved ITS domains, the D1-D1' and Box-B helices for Calochaete cimrmanii, Tolypothrix sp.…”

Section: Classmentioning

confidence: 99%

<i>Calochaete gen. nov.</i> (Cyanobacteria, Nostocales), a new cyanobacterial type from the “páramo” zone in Costa Rica

Bohunická¹,

Mühlsteinová²

2013

Phytotaxa

744

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A new tapered and false branched morphotype of filamentous heterocytous cyanobacterium was isolated from soil material collected on a massif of Chirripó Mountain, Costa Rica. The strain was analyzed morphologically and a sequence of its 16S rRNA gene was compared with available 16S rDNA sequences of organisms with similar morphology, especially those with heteropolar tapering filaments. Phylogenetic analyses revealed that the strain was significantly different from Rivulariaceae, but was closely related to several strains designated as Tolypothrix. However, according to the original descriptions in the literature, members of the genus Tolypothrix possess only very slightly tapering filaments. With regard to all these differences, we decided to describe a new genus-Calochaete gen. nov. with type species C. cimrmanii.

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“…Although the order contains a number of morphologically well-defined genera (e.g. Tapinothrix, Nodosilinea, Leibleinia, Heteroleibleinia, Limnothrix, Pseudanabaena), molecular characterization has led many to conclude that the genera and species within this order require revision (Albertano & Kováčik, 1996;Turner, 1997;Wilmotte et al, 1997;Castenholz, 2001;Wilmotte & Herdman, 2001;Taton et al, 2003;Casamatta et al, 2005;Komárek & Anagnostidis, 2005;Johansen et al, 2011;Perkerson et al, 2011). In particular, the genus Leptolyngbya has been found to be polyphyletic, and much of the revisionary work has focused on members of this morphologically poorly defined genus (untapered trichomes with sheaths).…”

Section: Introductionmentioning

confidence: 99%

Seven new species ofOculatella(Pseudanabaenales, Cyanobacteria): taxonomically recognizing cryptic diversification

Osorio‐Santos¹,

Pietrasiak²,

Bohunická³

et al. 2014

European Journal of Phycology

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144

158

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A total of 27 strains of Oculatella were isolated, characterized and sequenced, and analysed phylogenetically with an additional environmental clone from the Atacama Desert and 10 strains isolated and sequenced by others. The strains were clearly separated based upon phylogenetic analyses conducted with a concatenated alignment of the 16S rRNA and 16S-23S ITS region of the ribosomal operons in the genus Oculatella. Differences in secondary structure of the conserved domains of the ITS region, as well as comparative analysis of P-distance among ITS regions, served to separate the strains into distinct taxonomic units. Seven new species of Oculatella were described, including four from arid to semi-arid soils (O. atacamensis, O. mojaviensis, O. coburnii, O. neakameniensis) and three from more mesic habitats, including a temperate lake (O. hafneriensis), a desert waterfall (O. cataractarum) and a Hawaiian sea cave (O. kauaiensis). The soil forms show statistically significant morphological differences, but the ranges overlap to a degree that they are not diagnosable by morphology, and these four cryptic species are characterized here using molecular characters. The more mesic species, including the type species from Mediterranean hypogea, O. subterranea, are all morphologically distinct from each other and from all four soil taxa. This report is the first to use solely molecular criteria to distinguish cryptic species of cyanobacteria.

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Utility of 16S-23S ITS sequence and secondary structure for recognition of intrageneric and intergeneric limits within cyanobacterial taxa: Leptolyngbya corticola sp. nov. (Pseudanabaenaceae, Cyanobacteria)

Cited by 110 publications

References 35 publications

Scytonematopsis contorta sp. nov. (Nostocales), a new species from the Hawaiian Islands.

Scytonematopsis contorta sp. nov. (Nostocales), a new species from the Hawaiian Islands.

<i>Calochaete gen. nov.</i> (Cyanobacteria, Nostocales), a new cyanobacterial type from the “páramo” zone in Costa Rica

Seven new species ofOculatella(Pseudanabaenales, Cyanobacteria): taxonomically recognizing cryptic diversification

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