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J Bacteriol. 1971 July; 107(1): 268-294
Copyright © 1971 American Society for Microbiology. All Rights Reserved.

Taxonomy of Marine Bacteria: the Genus Beneckea

Paul Baumann, Linda Baumann and M. Mandel

Department of Microbiology, University of Hawaii, Honolulu, Hawaii 96822, and Department of Biology, The University of Texas, M. D. Anderson Hospital and Tumor Institute at Houston, Houston, Texas 77025

ABSTRACT

One-hundred-and-forty-five isolates of marine origin were submitted to an extensive physiological, nutritional, and morphological characterization. All strains were gram-negative, facultatively anaerobic, straight or curved rods which were motile by means of flagella. Glucose was fermented with the production of acid but no gas. Sodium but no organic growth factors were required. None of the strains were able to denitrify or fix molecular nitrogen. The results of nutritional and physiological tests were submitted to a numerical analysis. On the basis of phenotypic similarity, nine groups were established. These groups could be distinguished from one another by multiple, unrelated, phenotypic traits. Six groups which had deoxyribonucleic acid (DNA) containing 45 to 48 moles per cent guanine plus cytosine (GC) were assigned to a redefined genus Beneckea. All of the strains in this genus, when grown in liquid medium, had a single, polar flagellum. When grown on a solid medium, many strains had peritrichous flagella. Two groups were similar to previously described species and were designated B. alginolytica and B. natriegens. The remaining four groups were designated B. campbellii, B. neptuna, B. nereida, and B. pelagia. An additional group of phenotypically similar strains having the properties of the genus Beneckea was not included in the numerical analysis. These strains were readily separable from species of this genus and were designated B. parahaemolytica. Of the remaining groups, one was identified as Photobacterium fischeri. The other group (B-2) which had about 41 moles% GC content in its DNA could not be placed into existing genera.

J Bacteriol. 1971 July; 107(1): 268-294
Copyright © 1971 American Society for Microbiology. All Rights Reserved.



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