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Int J Syst Evol Microbiol 57 (2007), 2056-2061; DOI  10.1099/ijs.0.65044-0
© 2007 International Union of Microbiological Societies

Stenotrophomonas terrae sp. nov. and Stenotrophomonas humi sp. nov., two nitrate-reducing bacteria isolated from soil

Kim Heylen, Bram Vanparys, Filip Peirsegaele, Liesbeth Lebbe and Paul De Vos

Laboratory of Microbiology, Department of Biochemistry, Physiology and Microbiology, Ghent University, K.L. Ledeganckstraat 35, B-9000 Gent, Belgium

Correspondence
Kim Heylen
Kim.Heylen{at}UGent.be

Three Gram-negative, rod-shaped, non-spore-forming, nitrate-reducing isolates (R-32746, R-32768T and R-32729T) were obtained from soil. Analysis of repetitive sequence-based PCR showed that the three isolates represented two different strains. 16S rRNA gene sequence analysis and DNA–DNA hybridization placed them within the genus Stenotrophomonas and revealed that they were genotypically different from each other and from all recognized Stenotrophomonas species. Analysis of the fatty acid composition and physiological and biochemical tests allowed differentiation from their closest phylogenetic neighbours. They are therefore considered to represent two novel species, for which the names Stenotrophomonas terrae sp. nov. and Stenotrophomonas humi sp. nov. are proposed, with strains R-32768T (=LMG 23958T=DSM 18941T) and R-32729T (=LMG 23959T=DSM 18929T), respectively, as the type strains.

Abbreviations: RFLP, restriction fragment length polymorphism

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains R-32768T and R-32729T are AM403589 and AM403587, respectively.

A table giving the cellular fatty acid compositions of strains R-32768T and R-32729T and their closest phylogenetic neighbours is available as supplementary material with the online version of this paper.






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Copyright © 2007 by the International Union of Microbiological Societies.