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- Volume 66, Issue 11
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f Polygonibacillus indicireducens gen. nov., sp. nov., an indigo-reducing and obligate alkaliphile isolated from indigo fermentation liquor for dyeing
- Authors: Kikue Hirota1 , Takahiro Okamoto1,2 , Hidetoshi Matsuyama2 , Isao Yumoto1,3
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1 1Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukisamu-Higashi, Toyohira-ku, Sapporo 062-8517, Japan 2 2School of Biological Science and Engineering, Tokai University, Minamisawa, Minami-ku, Sapporo 005-8601, Japan 3 3Laboratory of Molecular Environmental Microbiology, Graduate School of Agriculture, Hokkaido University, Kita-ku, Sapporo 060-8589, Japan
- Correspondence Isao Yumoto [email protected]
- First Published Online: 01 November 2016, International Journal of Systematic and Evolutionary Microbiology 66: 4650-4656, doi: 10.1099/ijsem.0.001405
- Subject: New taxa - Firmicutes and related organisms
- Received:
- Accepted:
- Cover date:




Polygonibacillus indicireducens gen. nov., sp. nov., an indigo-reducing and obligate alkaliphile isolated from indigo fermentation liquor for dyeing, Page 1 of 1
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Obligately alkaliphilic and halophilic strains, designated In2-9T and D2-7, were isolated from a fermented Polygonum indigo (Polygonum tinctorium Lour.) liquor sample obtained from a craft centre in Date City, Hokkaido, Japan. The 16S rRNA gene sequence phylogeny suggested that strain In2-9T is a member of the genus Bacillus with the closest relatives being the alkaliphilic species of the genus Bacillus , Bacillus hemicellulosilyticusJCM 9152T (96.4 % 16S rRNA gene sequence similarity) and Bacillus alcalophilus DSM 485T (96.5 %). Cells of the isolate stained Gram-positive and were facultatively anaerobic straight rods that were motile by peritrichous flagella. Strain In2-9T grew between 13 and 45 °C with optimum growth at approximately 35–37 °C. The isolates grew in the pH range of 8–12 with optimum growth at pH 10. The isoprenoid quinone detected was menaquinone-6 (MK-6) and the DNA G+C content was 39.4 mol%. The whole-cell fatty acid profile mainly (>10 %) consisted of iso-C15 : 0, anteiso-C15 : 0 and C16 : 0. Spore shape and location and chemotaxonomic characteristics revealed that the isolates were distinctly different from phylogenetic neighbouring alkaliphilic species of the genus Bacillus . On the basis of phenotypic and chemotaxonomic characteristics and phylogenetic data, the isolates represent a novel species of a new genus, for which the name Polygonibacillus indicireducens gen. nov., sp. nov. is proposed. The type strain of the type species is In2-9T (=JCM 30831T=NCIMB 14982T), and strain D2-7 is an additional strain of the species.
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The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequence of strains In2-9T and D2-7 are LC054224 and LC054225, respectively, and those for the rpoB gene sequences of strains In2-9T and D2-7 are LC160335 and LC160336, respectively. Other sequences determined in this study have been deposited as LC160337.
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A supplementary table and four supplementary figures are available with the online Supplementary Material.
- Keyword(s): indigo fermentation liquor, Polygonibacillus indicireducens, indigo reduction, alkaliphilic
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Abbreviations: meso-DAP meso-diaminopimelic acid TEM transmission electron microscopy
© 2016 IUMS | Published by the Microbiology Society
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