International Journal of Systematic and Evolutionary Microbiology, Vol 51, 1549-1555, Copyright © 2001 by Society for General Microbiology

Pseudomonas kilonensis sp. nov., a bacterium isolated from agricultural soil

J Sikorski, E Stackebrandt and W Wackernagel
Genetik, Fachbereich Biologie, University of Oldenburg, D-26111 Oldenburg, Germany

A total of 131 bacterial isolates related to Pseudomonas corrugata were obtained from an agricultural soil from northern Germany. Based on 16S rRNA gene sequences, PCR-based genome fingerprinting and multilocus enzyme electrophoresis, they formed two groups, A (119 strains) and B (12 strains). As members of each group were highly similar, a single strain of each group was subsequently characterized by a polyphasic taxonomic approach. The selected member of group A was identified as a strain of Pseudomonas brassicacearum, whereas the selected member of group B was distinct from other species of the genus Pseudomonas. Although DNA--DNA hybridization suggested a close affiliation of the group B strain with P. brassicacearum and Pseudomonas thivervalensis and ribotyping suggested a close affiliation with P. brassicacearum, RAPD data, 16S rRNA gene sequencing and phenotypic characterization indicated the presence of a distinct taxonomic entity. This strain differed from the type strains of P. thivervalensis and P. brassicacearum in 10 and 12 metabolic properties, respectively, whereas the two organisms differ from one another by only two properties. Strains of group B are therefore considered to be members of a new species, for which the name Pseudomonas kilonensis sp. nov. is proposed. The type strain is strain 520-20(T) (=DSM 13647(T)=CFBP 5372(T)).

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