1. Sedimenticola hydrogenitrophicus sp. nov. a chemolithoautotrophic bacterium isolated from a terrestrial mud volcano, and proposal of Sedimenticolaceae fam. nov. in the order Chromatiales.
- Author
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Slobodkina G, Merkel A, Ratnikova N, Kuchierskaya A, and Slobodkin A
- Subjects
- Bacterial Typing Techniques, Phylogeny, Ecosystem, RNA, Ribosomal, 16S genetics, Bacteria genetics, DNA, Bacterial genetics, DNA, Bacterial chemistry, Sequence Analysis, DNA, Nitrates, Fatty Acids chemistry
- Abstract
Chemolithoautotrophic microorganisms can play a significant role in the biogeochemical cycling of elements in deep-subsurface-associated environments. A novel facultatively anaerobic lithoautotrophic bacteria (strains SB48
T and SN1189) were isolated from terrestrial mud volcanoes (Krasnodar Krai, Russia). Cells of the strains were straight motile rods. Growth was observed at temperatures up to 35 °C (optimum at 30 °C), pH 6.0-8.5 (optimum at pH 7.5) and NaCl concentrations of 0.5-4.0% (w/v) (optimum at 1.5-2.0% (w/v)). The isolates grew chemolithoautotrophically with molecular hydrogen or thiosulfate as an electron donor, nitrate as an electron acceptor and CO2 /HCO3 - as a carbon source. They also grew with organic acids, ethanol, yeast extract and peptone. The isolates were capable of either anaerobic respiration with nitrate or nitrous oxide as the electron acceptors or aerobic respiration under microaerobic condition. The total size of the genome of strains SB48T and SN1189 was 4.71 and 5.13 Mbp, respectively. Based on phenotypic and phylogenetic characteristics, strains SB48T and SN1189 represent a novel species of the genus Sedimenticola, S. hydrogenitrophicus (the type strain is SB48T = KCTC 25568T = VKM B-3680T ). The new isolates are the first representatives of the genus Sedimenticola isolated from a terrestrial ecosystem. Based on phylogenomic reconstruction we propose to include the genus Sedimenticola and the related genera into a new family Sedimenticolaceae fam. nov. within the order Chromatiales., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier GmbH. All rights reserved.)- Published
- 2023
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