1887

Abstract

A novel xylan-degrading bacterium, designated XDB9, was isolated from forest humus collected from Gyeryong Mountain in Korea. Cells were Gram-positive, aerobic, motile and endospore-forming rods. A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences showed that strain XDB9 was most closely related to members of the genus . 16S rRNA gene sequence similarities between strain XDB9 and the type strains of species of the genus ranged from 98.0 to 98.5 %. The cell-wall peptidoglycan type of strain XDB9 was A4, which is based on -Lys–-Asp. Strain XDB9 contained iso-C and C 7 alcohol as the major fatty acids and MK-7 as the predominant menaquinone. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The DNA G+C content was 37.2 mol%. The DNA–DNA hybridization results and differential phenotypic properties showed that strain XDB9 could be distinguished from recognized species of the genus . It was concluded that strain XDB9 represents a new taxon for which the name sp. nov. is proposed. The type strain is XDB9 (=KCTC 13423=CCUG 57438).

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2010-02-01
2019-10-20
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