Microbacterium flavum sp. nov. and Microbacterium lacus sp. nov., isolated from marine environments.
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概要
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Strains YM18-098<SUP>T</SUP> and A5E-52<SUP>T</SUP> were both Gram-positive, aerobic, irregular rod-shaped bacteria, with lysine and ornithine as the diagnostic diamino acids of their peptidoglycans, respectively. The acyl type of the peptidoglycan in both cases was <I>N</I>-glycolyl. The major menaquinones were MK-11, -12 and -13. Mycolic acids were not detected. The G+C content of the DNA was 69–70 mol%. Comparative 16S rRNA studies revealed that the isolates belonged to the genus <I>Microbacterium</I>, that YM18-098<SUP>T</SUP> was closely related to the species <I>Microbacterium lacticum</I> and <I>Microbacterium schleiferi</I>, and that A5E-52<SUP>T</SUP> was closely related to the species <I>Microbacterium aurum</I>, <I>Microbacterium aoyamense, Microbacterium deminutum</I> and <I>Microbacterium pumilum</I>. DNA-DNA relatedness analysis showed that the isolated strains represented two separate genomic species. Based on both phenotypic and genotypic data, the following new species of the genus <I>Microbacterium</I> are proposed: <I>Microbacterium flavum</I> sp. nov. and <I>Microbacterium lacus</I> sp. nov., with the type strains YM18-098<SUP>T</SUP> (= MBIC08278<SUP>T</SUP>, DSM 18909<SUP>T</SUP>) and A5E-52<SUP>T</SUP> (= MBIC08279<SUP>T</SUP>, DSM 18910<SUP>T</SUP>), respectively.
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