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Bacterial strain THMBM1T was isolated from decomposing algal scum that was collected during an algal bloom in Lake Taihu, Wuxi City, Jiangsu Province, China. Cells of strain THMBM1T were Gram-negative, facultatively anaerobic, non-motile rods. Colonies on tryptic soy agar were translucent and shiny with entire edges; yellow flexirubin-type pigments were produced. Growth was observed at 15–45 °C (optimum 30–37 °C), at pH 5.0–9.0 (optimum pH 8.0) and in the presence of 0–4.0 % (w/v) NaCl (optimum 0–1.0 %). Strain THMBM1T contained MK-6 as the sole respiratory quinone and sym-homospermidine as the predominant polyamine. The predominant cellular fatty acids were iso-C15 : 0 (53.2 %), iso-C17 : 0 3-OH (15.6 %) and iso-C17 : 1ω9c (11.9 %). The polar lipid profile consisted of phosphatidylethanolamine and five unidentified lipids. The DNA G+C content was 36.8 mol% (T m). Strain THMBM1T was closely related to members of the genus Chryseobacterium , with 16S rRNA gene sequence similarities ranging from 92.9 to 97.2 %, the highest sequence similarities being with Chryseobacterium taiwanense BCRC 17412T (97.2 %) and C. gambrini 5-1St1aT (97.1 %). DNA–DNA relatedness between strain THMBM1T and C. taiwanense JCM 21767T and C. gambrini DSM 18014T was 34.1 and 23.0 %, respectively. Based on these results, it is concluded that strain THMBM1T represents a novel species, for which the name Chryseobacterium taihuense sp. nov. is proposed. The type strain is THMBM1T ( = CGMCC 1.10941T = NBRC 108747T). Emended descriptions of the genus Chryseobacterium and C. taiwanense , C. jejuense and C. indoltheticum are also proposed.
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