Cohnella nanjingensis sp. nov., an extracellular polysaccharide-producing bacterium isolated from soil

Int J Syst Evol Microbiol. 2014 Sep;64(Pt 9):3320-3324. doi: 10.1099/ijs.0.066456-0. Epub 2014 Jul 3.

Abstract

A Gram-stain-positive, rod-shaped, endospore-forming bacterium, strain D45(T), was isolated from soil in Nanjing, China. The organism grew optimally at 30 °C, pH 7.0 and with 0 % NaCl (w/v). The 16S rRNA gene sequence of the isolate showed similarities lower than 97 % with respect to species of the genus Cohnella. The predominant respiratory quinone was MK-7, with MK-6 present as a minor component; anteiso-C15 : 0 and iso-C16 : 0 were the major fatty acids. The polar lipids of strain D45(T) were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, two aminophospholipids, four phospholipids, two glycolipids, one aminolipid and two lipids. The DNA G+C content was 59.5 mol%. DNA-DNA hybridization of the isolate with two reference strains showed relatedness values of 33.4 % with Cohnella ginsengisoli DSM 18997(T) and 25.8 % with Cohnella thermotolerans DSM 17683(T). The phylogenetic, chemotaxonomic and phenotypic data supported the classification of strain D45(T) as a representative of a novel species of the genus Cohnella, for which the name Cohnella nanjingensis sp. nov. is proposed. The type strain is D45(T) ( = CCTCC AB 2014067(T) = DSM 28246(T)).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacillales / classification*
  • Bacillales / genetics
  • Bacillales / isolation & purification
  • Bacterial Typing Techniques
  • Base Composition
  • China
  • DNA, Bacterial / genetics
  • Fatty Acids / chemistry
  • Molecular Sequence Data
  • Nucleic Acid Hybridization
  • Peptidoglycan / chemistry
  • Phospholipids / chemistry
  • Phylogeny*
  • Polysaccharides, Bacterial / biosynthesis
  • RNA, Ribosomal, 16S / genetics
  • Sequence Analysis, DNA
  • Soil Microbiology*
  • Vitamin K 2 / analogs & derivatives
  • Vitamin K 2 / chemistry

Substances

  • DNA, Bacterial
  • Fatty Acids
  • Peptidoglycan
  • Phospholipids
  • Polysaccharides, Bacterial
  • RNA, Ribosomal, 16S
  • Vitamin K 2
  • menaquinone 6
  • menaquinone 7

Associated data

  • GENBANK/KF479666