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  • Taxonomy  (6)
  • Springer  (6)
  • Wiley
  • 2005-2009
  • 1985-1989  (6)
  • 1955-1959
  • 1
    Electronic Resource
    Electronic Resource
    Deoxyribonucleic acid reassociation in the taxonomy of the genus Chlorella (1986)
    Springer
    Archives of microbiology 145 (1986), S. 329-333 
    Details
    ISSN: 1432-072X
    Keywords: Chlorella sorokiniana ; Taxonomy ; DNA/DNA reassociation ; DNA homology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two different DNA hybridization methods were used to study the genetic relationships among strains of Chlorella sorokiniana. Closely related strains could be easily detected by comparison of DNA renaturation rates as determined spectrophotometrically, whereas the degree of relationship of more remotely related strains could be determined by means of reassociation of radioactively labelled DNA fragments with high-molecular-weight DNA bound to nitrocellulose filters. Strains assigned to C. sorokiniana proved to be a rather heterogeneous group with only 3 out of 17 strains being closely related to the type strain C. sorokiniana 211-8kT. The description of new species or subspecific taxa on the basis of nucleotide sequence similarities, however, does not seem justified before more detailed knowledge of genome organization in Chlorella is available.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00470866
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  • 2
    Electronic Resource
    Electronic Resource
    Deoxyribonucleic acid reassociation in the taxonomy of the genus Chlorella (1987)
    Springer
    Archives of microbiology 147 (1987), S. 221-224 
    Details
    ISSN: 1432-072X
    Keywords: Chlorella saccharophila ; Taxonomy ; DNA/DNA reassociation ; DNA homology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The genetic relationships of nine strains of Chlorella saccharophila were determined by DNA hybridization techniques. Four strains are closely related to the type strain 211-9a and one strain seems to be moderately related, whereas the taxonomic position of the remaining three strains is not clear. C. saccharophila, like C. sorokiniana, is another species of Chlorella containing strains which are heterogeneous in their overall DNA base sequence and partly also in morphological, biochemical and physiological characters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00463478
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  • 3
    Electronic Resource
    Electronic Resource
    Deoxyribonucleic acid reassociation in the taxonomy of the genus Chlorella (1987)
    Springer
    Archives of microbiology 149 (1987), S. 1-3 
    Details
    ISSN: 1432-072X
    Keywords: Chlorella fusca ; Chlorella kessleri ; Chlorella mutants ; Taxonomy ; DNA/DNA reassociation ; DNA homology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract DNA hybridization techniques showed Chlorella fusca var. vacuolata and C. kessleri to be homogeneous species with DNA homologies of 90–100% C. fusca var. fusca and var. rubescens, however, have only about 15% DNA homology with C. fusca var. vacuolata and should no longer be regarded as varieties. A good correlation was found so far between biochemical and physiological characters used in the taxonomy of Chlorella and DNA relatedness. Mutant strains of Chlorella were tested for DNA homologies to prove the reliability of the taxonomical interpretation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00423127
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  • 4
    Electronic Resource
    Electronic Resource
    Deoxyribonucleic acid reassociation in the taxonomy of the genus Chlorella (1989)
    Springer
    Archives of microbiology 152 (1989), S. 512-514 
    Details
    ISSN: 1432-072X
    Keywords: Chlorella vulgaris ; Chlorella luteoviridis ; Chlorella minutissima ; Chlorella zofingiensis ; Taxonomy ; DNA/DNA reassociation ; DNA homology ; DNA base composition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four species of the unicellular green alga Chlorella, C. vulgaris, C. luteoviridis, C. minutissima, and C. zofingiensis, were characterized with respect to DNA similarities as determined by quantitative DNA hybridization procedures. In contrast to previous DNA hybridization procedures. In contrast to previous results, C. vulgaris turned out to be a homogeneous species with the exception of strain 211-11c of the Göttingen collection, which was shown to belong to C. kessleri. Similary, C. luteoviridis and C. minutissima represent well defined species in terms of phenotypic and genotypic features. Whitin C. zofingiensis on strain is clearly different with respect to DNA base composition and DNA hybridization data even though it shares phenotypic characteristics with the other strains of C. zofingiensis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446939
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  • 5
    Electronic Resource
    Electronic Resource
    Deoxyribonucleic acid reassociation in the taxonomy of the genus Chlorella (1988)
    Springer
    Archives of microbiology 150 (1988), S. 509-511 
    Details
    ISSN: 1432-072X
    Keywords: Chlorella protothecoides ; Prototheca ; Taxonomy ; DNA/DNA reassociation ; DNA homology ; DNA base composition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract DNA homologies of 14 strains of Chlorella protothecoides were determined. All strains are related by a high degree of DNA similarity (96–102% D) with the exception of strain 211-11 a which proved to belong to C. kessleri. There is, however, no detectable DNA homology with strains of the genus Prototheca which is supposed to have evolved from C. protothecoides by loss of photosynthetic pigments. Even within Prototheca the low degree of DNA similarity indicates a heterogeneity similar to that observed in the genus Chlorella.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422296
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  • 6
    Electronic Resource
    Electronic Resource
    Deoxyribonucleic acid reassociation and interspecies relationships of the genusChlorella (Chlorophyceae) (1989)
    Springer
    Plant systematics and evolution 168 (1989), S. 71-82 
    Details
    ISSN: 1615-6110
    Keywords: Algae ; Chlorococcales ; Chlorophyceae ; Chlorella ; Scenedesmus ; Taxonomy ; phylogeny ; DNA reassociation ; DNA/DNA hybridization ; DNA homology ; DNA base composition ; thermal stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Phylogenetic relationships within the genusChlorella were studied by means of DNA/DNA hybridization under both optimal and relaxed reassociation conditions as well as by determination of the thermal stability of hybrid DNA duplexes. The results indicate a relationship betweenC. fusca var.fusca, C. fusca var.rubescens, C. fusca var.vacuolata, and the genusScenedesmus. In addition, the strains endosymbiotic withParamecium bursaria seem to be related with theC. vulgaris/sorokiniana group. The relations between most other species, however, could not be sufficiently resolved by the above methods. This implies considerable phylogenetic divergency within the genusChlorella.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936108
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