Alkalibaculum sporogenes sp. Nov., isolated from a terrestrial mud volcano and emended description of the genus Alkalibaculum

M. A. Khomyakova, A. Y. Merkel, D. A. Petrova, E. A. Bonch-Osmolovskaya, A. I. Slobodkin

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5 Citations (Scopus)


A novel anaerobic, endospore-forming bacterium (strain M08 DMBT) was isolated from a terrestrial mud volcano (Taman Pen-insula, Russia). Cells of the strain were motile rods 1.3–2.0 µm long and 0.4 µm in diameter. The temperature range for growth was 5–42 °C, with an optimum at 30 °C. The pH range for growth was H 6.5–11.0, with an optimum at pH 8.0. Growth of strain M08 DMBT was observed at NaCl concentrations of 0–5.0 % (w/v) with an optimum at 1.0 %. Strain M08 DMBT utilized 3,4-dimethoxybenzoic acid, 2-methoxyphenol, carbon monoxide, glucose, fructose, mannose, xylose and yeast extract. The end product of glucose fermentation was acetate. The DNA G+C content of strain M08 DMBT was 32.3 mol% (obtained via whole genome sequencing). The closest phylogenetic relative of strain M08 DMBT was Alkalibaculum bacchi (family Eubacteriaceae, class Clostridia) with 95.17 % 16S rRNA gene sequence similarity. Based on the phenotypic, genotypic and phylogenetic characteristics of the isolate, strain M08 DMBT is considered to represent a novel species of the genus Alkalibaculum, for which the name Alkalibaculum sporogenes sp. nov. is proposed. The type strain of Alkalibaculum sporogenes is M08 DMBT (=KCTC 15840T=VKM B-3387T).

Original languageEnglish
Article number004361
Pages (from-to)4914-4919
Number of pages6
JournalInternational Journal of Systematic and Evolutionary Microbiology
Issue number9
Publication statusPublished - 2020
Externally publishedYes


  • Acetogen
  • Endospores
  • Eubacteriaceae
  • Methoxylated aromatic compounds


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