DNA base composition within the genusScenedesmus (Chlorophyta) |
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Authors: | Reka Paschma Eberhard Hegewald |
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Institution: | (1) Landsbergerstrasse 50b, D-8911 Hofstetten, Germany;(2) KFA, IBT 3, Postfach 1913, D-5170 Jülich, Germany |
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Abstract: | The DNA base compositions of 60 strains ofScenedesmus were determined and found to be a valuable indicator for the differentiation within this genus (except for the very closely related species of the subsect.Desmodesmus). The range for allScenedesmus species was 49.9–69.3 mol% GC for nuclear DNA and 36.8–39.9 mol% GC for chloroplast DNA. The separation of the genusTetradesmus cannot be verified by GC values, becauseS. obliquus andS. ( Tetradesmus )wisconsinensis have a similar GC content.S. ( Chlorella )ultrasquamata, S. costato-granulatus (sect.Costato-granulati) andS. lunatus are separated clearly from all other species of the genus because of their high GC content. |
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Keywords: | Algae Chlorophyta Scenedesmus GC content systematic position |
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