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1 University of Campinas, 13084-510 Campinas, SP Brazil
2 DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Mascheroder Weg 1b, D-38124 Braunschweig, Germany
Correspondence
D. Fritze
dfr{at}dsmz.de
Twenty-two agarolytic, aerobic, spore-forming strains were characterized taxonomically by DNA–DNA reassociation experiments, riboprint analyses, 16S rDNA sequencing and phenetic similarity analyses. Based on riboprint analyses, the strains formed eight ribogroups, six of which contained 2–6 strains and two encompassed single strains. Within the multi-strain ribogroups, similarities ranged from 91–99 %. Phylogenetic analyses of representatives of the eight groups by 16S rDNA sequence analysis showed that the strains were affiliated to the genus Paenibacillus, but relatedness to described Paenibacillus species was only moderate (<97·8 % sequence similarity). Published DNA–DNA similarity values for most of the agarolytic strains, supplemented with new data, supported the distinctiveness of the eight ribogroups. Intragroup DNA–DNA similarity values ranged from 80 to 104 %, while intergroup DNA–DNA similarities were <35 %. Based on genomic distinctiveness and supported by the presence of distinguishing phenotypic properties, multi-strain groups 1 and 2 are proposed as novel species, Paenibacillus agarexedens sp. nov., nom. rev. (type strain, DSM 1327T=CIP 107437T) and Paenibacillus agaridevorans sp. nov. (type strain, DSM 1355T=CIP 107436T).
Published online ahead of print on 13 January 2003 as DOI 10.1099/ijs.0.02420-0.
Present address: Mühlwang 9, 25899 Bosbüll, Germany.
Present address: Chemnitzer Str. 3, 37085 Göttingen, Germany.
The GenBank/EMBL/DDBJ accession numbers for the 16S rDNA sequences determined in this study are AJ345017 (DSM 1352), AJ345018 (DSM 6358), AJ345019 (DSM 1482), AJ345020 (DSM 1327T), AJ345021 (DSM 1474), AJ345022 (DSM 34), AJ345023 (DSM 1355T) and AJ345024 (DSM 1481).
Micrographs of cells and spores of strains DSM 1327T and DSM 1355T are available as supplementary data in IJSEM Online.
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