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Molecular and phylogenetic characterization of Phormidium species (Cyanoprokaryota) using the cpcB-IGS-cpcA locus

Teneva, Ivanka LU ; Dzhambazov, Balik LU ; Mladenov, R and Schirmer, K (2005) In Journal of Phycology 41(1). p.188-194
Abstract
The accurate determination of species of Cyanoprokaryota/Cyanophyceae has many important applications. These include the assessment of risk with regard to blooms in water reservoirs as well as the identification of species capable of producing valuable bioactive compounds. Commonly, Cyanoprokaryota are classified based on their morphology. However, morphological criteria are not always reliable because they may change, for example, due to environmental factors. Thus, genetic and molecular analyses are a promising additional approach, but their application has so far been limited to relatively few genera. In light of this, we present here the first characterization of species and strains of the genus Phormidium Kutz. based on the... (More)
The accurate determination of species of Cyanoprokaryota/Cyanophyceae has many important applications. These include the assessment of risk with regard to blooms in water reservoirs as well as the identification of species capable of producing valuable bioactive compounds. Commonly, Cyanoprokaryota are classified based on their morphology. However, morphological criteria are not always reliable because they may change, for example, due to environmental factors. Thus, genetic and molecular analyses are a promising additional approach, but their application has so far been limited to relatively few genera. In light of this, we present here the first characterization of species and strains of the genus Phormidium Kutz. based on the cpcB-IGS-cpcA locus of the phycocyanin operon. In phylogenetic analyses using deduced amino acid sequences of the cpcB-cpcA regions, Phormidium was found to be polyphyletic. This analysis appeared to be dominated by the cpcB region, which is characterized by a relatively high percentage of informative substitutions. The percentage of variable positions within the cpcB-IGS-cpcA locus overall was 16.5%, thereby indicating a level of divergence remarkably higher than that reported for Nodularia and Arthrospira in previous studies relying on cpcB-IGS-cpcA. Further, alignment of informative nucleotide substitutions in the cpcB-IGS-cpcA sequences revealed a mosaic distribution, which may be indicative of genetic recombination events. Finally, the length and sequences of the IGS region alone proved useful as markers to differentiate the cyanobacterial genus Phormidium. However, whether the IGS region per se is sufficiently discriminatory to differentiate between Phormidium species or even strains requires further investigation using newly identified Phormidium sequence data. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
phylogeny, systematics, taxonomy, operon, phycocyanin, Phormidium, intergenic spacer, Cyanoprokaryota, DNA
in
Journal of Phycology
volume
41
issue
1
pages
188 - 194
publisher
Wiley-Blackwell
external identifiers
  • wos:000226791300018
  • scopus:14044265204
ISSN
0022-3646
DOI
10.1111/j.1529-8817.2005.04054.x
language
English
LU publication?
yes
id
7ec3ffff-ae0b-4a56-bbc7-6eb3339529f2 (old id 253561)
date added to LUP
2007-08-20 09:55:41
date last changed
2017-08-27 04:24:46
@article{7ec3ffff-ae0b-4a56-bbc7-6eb3339529f2,
  abstract     = {The accurate determination of species of Cyanoprokaryota/Cyanophyceae has many important applications. These include the assessment of risk with regard to blooms in water reservoirs as well as the identification of species capable of producing valuable bioactive compounds. Commonly, Cyanoprokaryota are classified based on their morphology. However, morphological criteria are not always reliable because they may change, for example, due to environmental factors. Thus, genetic and molecular analyses are a promising additional approach, but their application has so far been limited to relatively few genera. In light of this, we present here the first characterization of species and strains of the genus Phormidium Kutz. based on the cpcB-IGS-cpcA locus of the phycocyanin operon. In phylogenetic analyses using deduced amino acid sequences of the cpcB-cpcA regions, Phormidium was found to be polyphyletic. This analysis appeared to be dominated by the cpcB region, which is characterized by a relatively high percentage of informative substitutions. The percentage of variable positions within the cpcB-IGS-cpcA locus overall was 16.5%, thereby indicating a level of divergence remarkably higher than that reported for Nodularia and Arthrospira in previous studies relying on cpcB-IGS-cpcA. Further, alignment of informative nucleotide substitutions in the cpcB-IGS-cpcA sequences revealed a mosaic distribution, which may be indicative of genetic recombination events. Finally, the length and sequences of the IGS region alone proved useful as markers to differentiate the cyanobacterial genus Phormidium. However, whether the IGS region per se is sufficiently discriminatory to differentiate between Phormidium species or even strains requires further investigation using newly identified Phormidium sequence data.},
  author       = {Teneva, Ivanka and Dzhambazov, Balik and Mladenov, R and Schirmer, K},
  issn         = {0022-3646},
  keyword      = {phylogeny,systematics,taxonomy,operon,phycocyanin,Phormidium,intergenic spacer,Cyanoprokaryota,DNA},
  language     = {eng},
  number       = {1},
  pages        = {188--194},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Phycology},
  title        = {Molecular and phylogenetic characterization of Phormidium species (Cyanoprokaryota) using the cpcB-IGS-cpcA locus},
  url          = {http://dx.doi.org/10.1111/j.1529-8817.2005.04054.x},
  volume       = {41},
  year         = {2005},
}