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Paenibacillus barcinonensis sp. nov., a xylanase-producing bacterium isolated from a rice field in the Ebro River delta

¹ Department of Microbiology, Faculty of Biology, University of Barcelona, Avenida Diagonal 645, 08028 Barcelona, Spain
² DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Mascheroder Weg 1b, D-38124, Braunschweig, Germany

Correspondence
F. I. Javier Pastor
fpastor{at}bio.ub.es

A Gram-positive, endospore-forming, xylanase-producing bacterium isolated from a rice field was studied taxonomically. The strain grows at 10–40 °C and in the presence of lysozyme or 5 % (w/v) NaCl. Chemotaxonomic analysis revealed that MK-7 was the predominant menaquinone of the isolated strain, while the major fatty acid was anteiso-C_{15 : 0}. Comparison of 16S rRNA gene sequences showed that strain BP-23^T fell within the radiation of the cluster comprising Paenibacillus species. The highest 16S rRNA gene sequence similarities were found with Paenibacillus illinoisensis (97·4 %), Paenibacillus pabuli (97·1 %) and Paenibacillus amylolyticus (96·9 %). The DNA–DNA relatedness of strain BP-23^T with respect to these three species was very low (32·7, 31·6 and 23·0 %, respectively). On the basis of phenotypic and genotypic data, strain BP-23^T should be placed in the genus Paenibacillus and designated a novel species, for which the name Paenibacillus barcinonensis sp. nov. is proposed. The type strain is BP-23^T (=CECT 7022^T=DSM 15478^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain BP-23^T is AJ716019.

Micrographs of sporulating cells of strain BP-23^T and an extended version of the neighbour-joining tree shown in Fig. 1 are available as supplementary material in IJSEM Online.

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