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Volume 57, Issue 4

sp. nov., isolated from type II sourdough fermentation Free

Abstract

Two strains of Gram-positive, catalase-negative, lactic acid bacteria, strains TMW 1.1309 and TMW 1.1313, were isolated at an interval of several years from an industrial type II sourdough. They occurred at cell numbers of 8×10 c.f.u. g and therefore were considered to be one of the dominant members of the microbiota in this type of fermentation. Cells of both strains grow exclusively on modified MRS containing trypsin-digested rye-bran extract. Both strains possessed identical 16S rRNA gene sequences, but could be discriminated by RAPD fingerprints. Comparative 16S rRNA and gene sequence analyses positioned strain TMW 1.1309 as part of the phylogenetic group within the genus . The 16S rRNA gene sequence similarities to the closest related species, and were 97.1 and 95.4 %, respectively. The DNA G+C content of strain TMW 1.1309 was 48 mol%. Growth characteristics, biochemical features and DNA–DNA hybridization values below 70 % with all the nearest neighbours demonstrated that the isolates represent a novel species. The name sp. nov. is proposed for the novel isolates, with the type strain TMW 1.1309 (=DSM 17896=CCUG 53218).

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Keyword(s): RAPD, randomly amplified polymorphic DNA
SGM
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2007-04-01
2024-04-26
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Lactobacillus secaliphilus sp. nov., isolated from type II sourdough fermentation
Int J Syst Evol Microbiol 57, 745 (2007); https://doi.org/10.1099/ijs.0.64700-0
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