Novosphingobium aureum sp. Nov., a marine bacterium isolated from salt flat sediment

Yeonjae Yoo, Dongjun Kim, Hanbyul Lee, Jong Seong Khim, Bogun Kim, Dongmin Yang, Duleepa Pathiraja, Ingeol Choi, Jae Jin Kim

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Abstract

A Gram-stain-negative, aerobic, pale yellow-coloured, rod-shaped marine bacterium designated strain YJ-S2-02T was isolated from salt flat sediment sampled in Yongyu-do, Republic of Korea. Strain YJ-S2-02T grew at pH 6.0–9.0 (optimum, pH 7.0), 10–40 °C (optimum, 30 °C) and with optimum 1% (w/v) NaCl. The 16S rRNA gene sequence analysis indicated that strain YJ-S2-02T was closely related to Novosphingobium naphthalenivorans NBRC 102051T (97.8%) followed by Novosphingobium mathurense SM117T (97.5%), Novosphingobium indicum H25T (97.3%), Novosphingobium pentaromativorans US6-1T (96.8%), Novosphingobium fontis STM-14T (96.6%), Novosphingobium endophyticum EGI60015T (96.5%), Novosphingobium naphthae D39T (96.5%) and Novo-sphingobium malaysiense MUSC 273T (95.9%). The average nucleotide identity and estimated DNA–DNA hybridization values between YJ-S2-02T and related type strains were 77.0–77.9% and 19.1–24.0%. Strain YJ-S2-02T was characterized as having Q-10 as the predominant respiratory quinone and the principal fatty acids (>10%) were summed feature 8 (C18:1 ω6c/ω7c, 20.7%), C18:3 ω6c (16.3%) and C17:1 ω6c (11.8%). The polar lipids consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, sphingolipids and two unidentified lipids. The DNA G+C content of strain YJ-S2-02T was 65.6 mol%. On the basis of the polyphasic taxonomic evidence presented in this study, YJ-S2-02T should be classified as representing a novel species within the genus Novosphingobium, for which name Novosphingobium aureum is proposed, with the type strain YJ-S2-02T (=KACC 21677T =KCTC 72891T=JCM 33996T).

Original languageEnglish
Article number004930
JournalInternational Journal of Systematic and Evolutionary Microbiology
Volume71
Issue number7
DOIs
Publication statusPublished - 2021

Keywords

  • Marine bacteria
  • Novosphingobium
  • Salt flat
  • Sphingomonadaceae

ASJC Scopus subject areas

  • Microbiology
  • Ecology, Evolution, Behavior and Systematics

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