1887

Abstract

Two anaerobic bacterial strains, designated SHI-1 and SHI-2, were isolated from chlorinated solvent-contaminated groundwater. They were found to be identical in phenotypic properties and shared high (98.5–99.8 %) pairwise 16S rRNA gene sequence similarity. Multiple 16S rRNA genes were found to be present in the isolates as well as DSM 17108 and DSM 13327. Strains SHI-1 and SHI-2 could be differentiated from their closest phylogenetic relatives, DSM 17108 and DSM 13327, on the basis of their phenotypic and phylogenetic properties. The isolates were Gram-negative, spore-forming, motile rods with peritrichous flagella. Growth occurred at 10–42 °C and pH 5.5–8.5. Fermentative growth was observed on Casamino acids, fructose, fumarate, glucose, glycerol, pyruvate and yeast extract. The major organic acids produced from glucose and glycerol fermentation were propionate and acetate. The major organic acids produced from fermentation of fumarate were propionate, acetate and succinate. The major cellular fatty acids were summed feature 4 (consisting of Cω8 and/or C), summed feature 8 (consisting of Cω8 and/or C) and C dimethyl aldehyde. The polar lipids comprised aminophospholipids, including phosphatidylethanolamine and phosphatidylserine, and an unknown phospholipid. The genomic DNA G+C content was 39.2 mol%. We propose that strains SHI-1 and SHI-2 are assigned to a novel species of the genus , with the name sp. nov. (type strain SHI-1  = NRRL Y-59407  = LMG 25549). The description of the genus is emended. We also propose the transfer of to the genus as comb. nov. (type strain TmPN3 = DSM 13327 = ATCC BAA-626), on the basis of phylogenetic, chemotaxonomic and phenotypic properties.

Funding
This study was supported by the:
  • Governor’s Biotechnology Initiative of the Louisiana Board of Regents
  • Enhancement of the LSU Hazardous Substance Research Center Environmental Biotechnology Initiative (Award BOR#015)
  • NPC Services
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2012-06-01
2024-03-29
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