Flavobacterium nackdongense sp. nov., a cellulose-degrading bacterium isolated from sediment

Arch Microbiol. 2020 Apr;202(3):591-595. doi: 10.1007/s00203-019-01770-5. Epub 2019 Nov 19.


A Gram-negative, non-motile, rod-shaped bacterial strain, designated GS13T, was isolated from sediments in a branch of the Nackdong River in Sangju, Korea. Optimal growth occurred at pH 7.0, 20 °C, and 0% NaCl. Phylogenetic analyses using 16S rRNA showed that strain GS13T is a member of the genus Flavobacterium, with highest similarity to Flavobacterium soyangense IMCC26223T (97.0%). The DNA G+C content of strain GS13T was 36.2 mol%. The dominant fatty acids were summed feature 3 (C16:1ω7c and/or C16:1ω6c) and iso-C15:0. The major polar lipids were phosphatidylethanolamine, three unidentified aminolipids, three unidentified lipids, and one unidentified aminophospholipid. The predominant respiratory quinone was MK-6. Our data demonstrate that strain GS13T can be distinguished from closely-related Flavobacterium species. Thus, strain GS13T is a novel Flavobacterium species, and we propose the name Flavobacterium nackdongense sp. nov. The type strain is GS13T (=KCTC 62569T = JCM 32765T).

Keywords: Bacteroidetes; Flavobacterium nackdongense; Freshwater.

MeSH terms

  • Bacterial Typing Techniques
  • Base Composition
  • Cellulose / metabolism*
  • DNA, Bacterial / genetics
  • Fatty Acids / chemistry
  • Fatty Acids / metabolism
  • Flavobacterium / classification
  • Flavobacterium / genetics
  • Flavobacterium / isolation & purification*
  • Flavobacterium / metabolism*
  • Geologic Sediments / microbiology*
  • Phylogeny
  • RNA, Ribosomal, 16S / genetics
  • Republic of Korea
  • Rivers / microbiology
  • Sequence Analysis, DNA


  • DNA, Bacterial
  • Fatty Acids
  • RNA, Ribosomal, 16S
  • Cellulose