1887

Abstract

A Gram-negative, aerobic, non-symbiotic bacterium (AM1V30) was isolated from the toxic dinoflagellate AL1V. On the basis of 16S rRNA gene sequence similarity, strain AM1V30 was most closely related (97.4 % similarity) to the type strain of , which belongs to the family within the order of the class . A polyphasic approach was used to clarify the taxonomic position of strain AM1V30. During the course of this study, a second species was described by others as belonging to the genus , namely ; it showed a somewhat higher level of 16S rRNA gene sequence similarity with respect to strain AM1V30 (98.2 %) and was also taken into account. The fatty acid profiles, physiological and biochemical data and DNA G+C content (59.7 mol%) support the classification of strain AM1V30 as a member of the genus . The characteristics of the novel strain were sufficiently distinct to indicate that it represents a separate species. To confirm this conclusion, DNA–DNA hybridizations were performed: low values (between 15.8 and 29.8 %) were obtained in all cases. Thus, AM1V30 represents a novel species within the genus , for which the name sp. nov. is proposed. Strain AM1V30 (=CECT 5682=DSM 16655) is the type strain.

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2006-08-01
2019-08-18
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Transmission electron micrographs of cells of strain AM1V30 . Bars, 0.5 µm (a), 0.1 µm (b) and 1 µm (c).

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