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Pseudonocardia benzenivorans sp. nov.

¹ Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 26–32, D-35392 Giessen, Germany
² DSMZ, D-38124 Braunschweig, Germany

Correspondence
Peter Kämpfer
peter.kaempfer{at}agrar.uni-giessen.de

A Gram-positive, rod-shaped, non-spore-forming bacterium (B5^T) was isolated from an enrichment culture that contained 1,2,3,5-tetrachlorobenzene as the sole source of carbon. On the basis of 16S rRNA gene sequence similarity studies, strain B5^T was shown to belong to the family Pseudonocardiaceae and was related most closely to Pseudonocardia sulfidoxydans (98·8 %) and Pseudonocardia hydrocarbonoxydans (98·3 %). 16S rRNA gene sequence similarity to other Pseudonocardia species was <97 %. Chemotaxonomic data [major menaquinone, MK-8(H₄); major polar lipids, diphosphatidylglycerol, phosphatidylethanolamine and phosphatidylinositol; major fatty acids, C_{16 : 0}, iso-C_{16 : 0} and iso-C_{15 : 0}] supported the affiliation of strain B5^T to the genus Pseudonocardia. The results of DNA–DNA hybridizations and physiological and biochemical tests allowed genotypic and phenotypic differentiation of strain B5^T from P. sulfidoxydans and P. hydrocarbonoxydans. Strain B5^T therefore represents a novel species of the genus Pseudonocardia, for which the name Pseudonocardia benzenivorans sp. nov. is proposed, with the type strain B5^T (=DSM 44703^T=CIP 107928^T).

A table showing fatty acid compositions of species of the genus Pseudonocardia and a parsimony tree based on 16S rRNA gene sequences are available as supplementary material in IJSEM Online.

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