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Int J Syst Evol Microbiol 59 (2009), 2323-2328; DOI  10.1099/ijs.0.006593-0
© 2009 International Union of Microbiological Societies

Identification of Beijerinckia fluminensis strains CIP 106281T and UQM 1685T as Rhizobium radiobacter strains, and proposal of Beijerinckia doebereinerae sp. nov. to accommodate Beijerinckia fluminensis LMG 2819

Monike Oggerin1, David R. Arahal2, Víctor Rubio3 and Irma Marín1

1 Centro de Biología Molecular Severo Ochoa, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
2 Spanish Type Culture Collection (CECT) and Department of Microbiology and Ecology, University of Valencia, Campus de Burjassot, 46100 Valencia, Spain
3 Instituto de Ciencias Agrarias, Centro de Ciencias Medio Ambientales, CSIC, 28006 Madrid, Spain

Correspondence
Irma Marín
imarin{at}cbm.uam.es

During the course of a research project with free-living, nitrogen-fixing bacteria, we determined the 16S rRNA gene sequence of Beijerinckia fluminensis strains UQM 1685T and CIP 106281T and discovered that they were only 90.6–91.2 % similar to the sequences of strains of other Beijerinckia species and subspecies. Moreover, the highest similarity to these sequences (99.7 %) corresponded to strains of Rhizobium radiobacter (including Agrobacterium tumefaciens). Other diagnostic features confirmed that the two strains have the same origin but do not descend from the nomenclatural type. At the same time, B. fluminensis LMG 2819 was characterized and it was found that its properties also do not agree with the original description of the species, although it can be considered a member of the genus. Further characterization, including chemotaxonomic and other phenotypic traits, allows us to propose (i) the identification of B. fluminensis strains CIP 106281T and UQM 1685T as strains of Rhizobium radiobacter and (ii) the designation of strain LMG 2819T (=CECT 7311T) as the type strain of a novel species, Beijerinckia doebereinerae sp. nov.

Abbreviations: PHB, polyhydroxybutyrate

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains LMG 2819T, UQM 1685 and CIP 106281 are respectively EU401905, EU401907 and EU401908.

ARDRA profiles with two restriction enzymes and a dendrogram based on the profiles are available as supplementary material with the online version of this paper.






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