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  • Title: Identification of heterotrophic nanoflagellates by restriction fragment length polymorphism analysis of small subunit ribosomal DNA.
    Author: Lim EL, Dennett MR, Caron DA.
    Journal: J Eukaryot Microbiol; 2001; 48(3):247-57. PubMed ID: 11411833.
    Abstract:
    Thirty clones derived from twenty isolates of heterotrophic nanoflagellates originating from a variety of marine and freshwater environments were examined by restriction fragment length polymorphism analysis of small subunit ribosomal RNA genes amplified by the polymerase chain reaction (riboprinting). The data were compared with light and electron microscopical identification of the isolates. On morphological criteria, sixteen of the thirty clones belonged to the genus Paraphysomonas De Saedeleer, seven to the genus Spumella Cienkowski, four to the genus Pteridomonas Penard and three to the genus Cafeteria Fenchel and Patterson. Among these taxa, eleven ribotypes were detected by analysis with the restriction enzymes Hinf I, Hae III, Sau3A I, and Msp I. Differentiation of nanoflagellate taxa by the riboprinting method supported taxonomic classification based on morphology at the generic and species level. The utility of the method for discriminating the 'naked' flagellates and for confirming the identity of polymorphic forms among species of Paraphysomonas is demonstrated.
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