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  • 1
    Electronic Resource
    Electronic Resource
    Erratum to “16S rRNA gene sequence analyses and inter- and intrageneric relationships of Xanthomonas species and Stenotrophomonas maltophilia” (1997)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 155 (1997), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1997.tb13883.x
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  • 2
    Electronic Resource
    Electronic Resource
    Structure of 5S rRNA in actinomycetes and relatives and evolution of eubacteria (1987)
    Springer
    Journal of molecular evolution 25 (1987), S. 255-260 
    Details
    ISSN: 1432-1432
    Keywords: 5S RNA ; Actinomycetes and relatives ; Mycobacteria ; Secondary structure ; Phylogeny of eubacteria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The primary structure of 5S ribosomal RNA has been determined in five species belonging to the genusMycobacterium and inMicrococcus luteus. The sequences of 5S RNAs from Actinomycetes and relatives point to the existence in this taxon of a bulge on the helix that joins the termini of the molecule. An attempt was made to reconstruct bacterial evolution from a sequence dissimilarity matrix based on 142 eubacterial 5S RNA sequences and corrected for multiple mutation. The algorithm is based on weighted pairwise clustering, and incorporates a correction for divergent mutation rates, as derived by comparison of sequence dissimilarities with an external reference group of eukaryotic 5S RNAs. The resulting tree is compared with the eubacterial phylogeny built on 16S rRNA catalog comparison. The bacteria for which the 5S RNA sequence is known form a number of clusters also discernible in the 16S rRNA phylogeny. However, the branching pattern leading to these clusters shows some notable discrepancies with the aforementioned phylogeny.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02100019
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  • 3
    Electronic Resource
    Electronic Resource
    The 5S ribosomal RNA sequences of a red algal rhodoplast and a gymnosperm chloroplast. Implications for the evolution of plastids and cyanobacteria (1988)
    Springer
    Journal of molecular evolution 27 (1988), S. 126-132 
    Details
    ISSN: 1432-1432
    Keywords: Rhodoplast ; Chloroplast ; Plastid ; Endosymbiosis ; 5S ribosomal RNA ; Nucleotide sequence ; Secondary structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The 5S ribosomal RNA sequences have been determined for the rhodoplast of the red algaPorphyra umbilicalis and the chloroplast of the coniferJuniperus media. The 5S RNA sequence of theVicia faba chloroplast is corrected with respect to a previous report. A survey of the known sequences and secondary structures of 5S RNAs from plastids and cyanobacteria shows a close structural similarity between all 5S RNAs from land plant chloroplasts. The algal plastid 5S RNAs on the other hand show much more structural diversity and have certain structural features in common with bacterial 5S RNAs. A dendrogram constructed from the aligned sequences by a clustering algorithm points to a common ancestor for the present-living cyanobacteria and the land plant plastids. However, the algal plastids branch off at an early stage within the plastid-cyanobacteria cluster, before the divergence between cyanobacteria and land plant chloroplasts. This evolutionary picture points to the occurrence of multiple endosymbiotic events, with the ancestors of the present algal plastids already established as photosynthetic endosymbionts at a time when the ancestors of the present land plant chloroplasts were still free-living cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02138372
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  • 4
    Electronic Resource
    Electronic Resource
    Phylogenetic Relationships of Nonaxenic Filamentous Cyanobacterial Strains Based on 16S rRNA Sequence Analysis (1996)
    Springer
    Journal of molecular evolution 42 (1996), S. 194-200 
    Details
    ISSN: 1432-1432
    Keywords: Key words: Evolution — Ribosomal RNA — Cyanobacteria —Leptolyngbya—Oscillatoria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. In order to determine the nearly complete 16S rRNA gene sequences of cyanobacteria originating from nonaxenic cultures, a cyanobacterium-specific oligonucleotide probe was developed to distinguish polymerase chain reaction (PCR) products of the cyanobacterial rRNA operons from those resulting from amplification of contaminating bacteria. Using this screening method the 16S rRNA genes of four nonaxenic filamentous cyanobacterial strains belonging to the genera Leptolyngbya and Oscillatoria were cloned and sequenced. For the genus Leptolyngbya, the 16S rRNA sequence of the axenic strain PCC 73110 was also determined. Phylogenetic trees were constructed based on complete and partial sequences. The results show that the strains Leptolyngbya foveolarum Komárek 1964/112, Leptolyngbya sp. VRUC 135 Albertano 1985/1, and Leptolyngbya boryanum PCC 73110 belong to the same cluster. Strain Oscillatoria cf. corallinae SAG 8.92, which contains the rare photosynthetic pigment CU-phycoerythrin, is not closely related to other CU-phycoerythrin-containing cyanobacteria. Oscillatoria agardhii CYA 18, which is a representative of planktonic Oscillatoria species that form toxic blooms in Norwegian inland waters, has no close relatives in the tree.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02198845
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  • 5
    Electronic Resource
    Electronic Resource
    Phylogenetic relationships of nonaxenic filamentous cyanobacterial strains based on 16S rRNA sequence analysis (1996)
    Springer
    Journal of molecular evolution 42 (1996), S. 194-200 
    Details
    ISSN: 1432-1432
    Keywords: Evolution ; Ribosomal RNA ; Cyanobacteria ; Leptolyngbya ; Oscillatoria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In order to determine the nearly complete 16S rRNA gene sequences of cyanobacteria originating from nonaxenic cultures, a cyanobacterium-specific oligonucleotide probe was developed to distinguish polymerase chain reaction (PCR) products of the cyanobacterial rRNA operons from those resulting from amplification of contaminating bacteria. Using this screening method the 16S rRNA genes of four nonaxenic filamentous cyanobacterial strains belonging to the generaLeptolyngbya andOscillatoria were cloned and sequenced. For the genusLeptolyngbya, the 16S rRNA sequence of the axenic strain PCC 73110 was also determined. Phylogenetic trees were constructed based on complete and partial sequences. The results show that the strainsLeptolyngbya foveolarum Komárek 1964/112,Leptolyngbya sp. VRUC 135 Albertano 1985/1, andLeptolyngbya boryanum PCC 73110 belong to the same cluster. StrainOscillatoria cf.corallinae SAG 8.92, which contains the rare photosynthetic pigment CU-phycoerythrin, is not closely related to other CU-phycoerythrin-containing cyanobacteria.Oscillatoria agardhii CYA 18, which is a representative of planktonicOscillatoria species that form toxic blooms in Norwegian inland waters, has no close relatives in the tree.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02198845
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  • 6
    Electronic Resource
    Electronic Resource
    Coniosporium perforans and C. apollinis, two new rock-inhabiting fungi isolated from marble in the Sanctuary of Delos (Cyclades, Greece) (1997)
    Springer
    Antonie van Leeuwenhoek 72 (1997), S. 349-363 
    Details
    ISSN: 1572-9699
    Keywords: phylogeny ; taxonomy ; rock fungi ; MCF ; meristematic fungi ; Coniosporium ; Sarcinomyces
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Coniosporium perforans and C. apollinis, orginating from marble in the Mediterranean basin, are described as new species of rock inhabiting microcolonial fungi. The morphologically similar species Monodictys castaneae (Wallr.) S. Hughes, Phaeosclera dematioides Sigler et al., and a Coniosporium-like strain are compared using 18S rDNA phylogeny and Restriction Length Fragment Polymorphism analysis of Internal Transcribed Spacer regions. Sarcinomyces crustaceus Lindner is additionally compared on the basis of 18S rDNA sequencing data. Phylogenetic analysis suggests that Phaeosclera dematioides is related to the ascomycetous order Dothideales and Monodictys castaneae to the Pleosporales, whereas the three Coniosporium species studied are a sister group to the Herpotrichiellaceae (Chaetothyriales). A similar affinity was suggested previously for the recently described meristematic rock-fungus Sarcinomyces petricola Wollenzien & de Hoog. Sarcinomyces crustaceus appears unrelated to this group, and hence the present new taxa cannot be described in this genus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1000570429688
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  • 7
    Electronic Resource
    Electronic Resource
    Evolution of green plants and their relationship with other photosynthetic eukaryotes as deduced from 5S ribosomal RNA sequences (1990)
    Springer
    Plant systematics and evolution 170 (1990), S. 85-96 
    Details
    ISSN: 1615-6110
    Keywords: Algae ; plants ; photosynthetic eukaryotes ; 5S ribosomal RNA ; nucleotide sequence ; phylogeny
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The nucleotide sequence of cytoplasmic 5S ribosomal RNAs from three gymnosperms,Pinus contorta, Taxus baccata andJuniperus media and from one fern,Pteridium aquilinum, have been determined. These sequences were aligned with all hitherto known cytoplasmic 5S ribosomal RNA sequences of photosynthetic eukaryotes. A dendrogram based on that set of sequences was constructed by a distance matrix method and the resulting tree compared with established views concerning plant and algal evolution. The following monophyletic groups of photosynthetic eukaryotes are recognizable: theRhodophyta, a group consisting ofPhaeophyta, Bacillariophyta andChrysophyta, and the green plants, the latter comprising green algae,Bryophyta, Pteridophyta andSpermatophyta. According to our 5S ribosomal RNA tree, green plants may have originated from some type of a green flagellated organism such asChlamydomonas. The land plants seem to have originated from some form of charophyte such asNitella. 5S ribosomal RNA seems to be less appropriate to estimate dissimilarities between species which have diverged relatively recently, like the angiosperms. Therefore, a precise evolutionary process is difficult to reconstruct for members of this group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937851
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