Kushneria pakistanensis sp. nov., a novel moderately halophilic bacterium isolated from rhizosphere of a plant (Saccharum spontaneum) growing in salt mines of the Karak area in Pakistan

Antonie Van Leeuwenhoek. 2015 Apr;107(4):991-1000. doi: 10.1007/s10482-015-0391-9. Epub 2015 Jan 30.

Abstract

The taxonomic position of a Gram-stain negative, moderately halophilic bacterium, designated NCCP-934(T), was investigated using polyphasic taxonomic approach. The strain NCCP-934(T) was isolated from rhizosphere of a plant (Saccharum spontaneum, family Poaceae) growing in salt mines area in the Karak district of Khyber Pakhtunkhwa Province, Pakistan. Cells of strain NCCP-934(T) are rod shaped and motile. The bacterium is strictly aerobic, can grow at a temperature range of 10-40 °C (optimum at 30-33 °C) and in a pH range of 6.0-10.5 (optimum pH 7.0-9.0). The strain can tolerate 1-30 % (w/v) NaCl (optimal growth occurs in the presence of approximately 3-9 % NaCl). The phylogenetic analysis based on the 16S rRNA gene sequence, showed that strain NCCP-934(T) belongs to the genus Kushneria with the highest sequence similarity to K. marisflavi SW32(T) (98.9 %), K. indalinina CG2.1(T) (98.7 %), K. avicenniae MW2a(T) (98.4 %) and less than 97 % similarity with other related species (94.7 % with the type species of the genus, K. aurantia A10(T)). DNA-DNA relatedness between strain NCCP-934(T) and the type strains of the closely related species was lower than 18 %. The chemotaxonomic data (major respiratory quinone, Q9; predominant fatty acids, C18:1 ω7c and C16:0 followed by C12:0 3-OH and Summed features 3 (C16:1 ω7c/iso-C15:0 2-OH); major polar lipids, diphosphatidylglycerol, phosphatidylglycerol, phosphatidylmonomethylethanol, phosphatidylserine, phosphatidylinositol and three polar lipid of unknown structure) supported the affiliation of strain NCCP-934(T) within the genus Kushneria. The DNA G+C content of strain NCCP-934(T) was 59.2 mol%. On the basis of phenotypic, chemotaxonomic and phylogenetic data, strain NCCP-934(T) can be distinguished from the closely related taxa and thus represents a novel species in the genus Kushneria, for which the name Kushneria pakistanensis sp. nov. is proposed, with the type strain NCCP-934(T) (=LMG 28525(T) = KCTC 42082(T) = JCM 18802(T)).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aerobiosis
  • Bacterial Typing Techniques
  • Base Composition
  • Cluster Analysis
  • Cytosol / chemistry
  • DNA, Bacterial / chemistry
  • DNA, Bacterial / genetics
  • DNA, Ribosomal / chemistry
  • DNA, Ribosomal / genetics
  • Fatty Acids / analysis
  • Halomonadaceae / classification*
  • Halomonadaceae / genetics
  • Halomonadaceae / isolation & purification*
  • Halomonadaceae / physiology
  • Hydrogen-Ion Concentration
  • Locomotion
  • Molecular Sequence Data
  • Nucleic Acid Hybridization
  • Pakistan
  • Phospholipids / analysis
  • Phylogeny
  • Quinones / analysis
  • RNA, Ribosomal, 16S / genetics
  • Rhizosphere
  • Saccharum / growth & development
  • Sequence Analysis, DNA
  • Sodium Chloride / metabolism
  • Soil Microbiology*
  • Temperature

Substances

  • DNA, Bacterial
  • DNA, Ribosomal
  • Fatty Acids
  • Phospholipids
  • Quinones
  • RNA, Ribosomal, 16S
  • Sodium Chloride

Associated data

  • GENBANK/AB970675