Deoxyribonucleic acid reassociation and interspecies relationships of the genusChlorella (Chlorophyceae) |
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Authors: | Volker A. R. Huss Gabriele Huss Erich Kessler |
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Affiliation: | (1) Institut für Botanik und Pharmazeutische Biologie der Universität, Staudtstrasse 5, D-8520 Erlangen, Federal Republic of Germany |
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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. |
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Keywords: | Algae Chlorococcales Chlorophyceae Chlorella Scenedesmus Taxonomy phylogeny DNA reassociation DNA/DNA hybridization DNA homology DNA base composition thermal stability |
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