ArticleMicrobes and environments2023
A Simple and Effective Method for Solid Medium Cultivation of Strictly Hydrogen- and Sulfur-oxidizing Chemolithoautotrophs Predominant in Deep-sea Hydrothermal Fields.
Article in Microbes and environments, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Strictly hydrogen- and sulfur-oxidizing chemolithoautotrophic bacteria, particularly members of the phyla Campylobacterota and Aquificota, have a cosmopolitan distribution in deep-sea hydrothermal fields. The successful cultivation of these microorganisms in liquid media has provided insights into their physiological, evolutionary, and ecological characteristics. Notably, recent population genetic studies on Sulfurimonas (Campylobacterota) and Persephonella (Aquificota) revealed geographic separation in their populations. Advances in this field of research are largely dependent on the availability of pure cultures, which demand labor-intensive liquid cultivation procedures, such as dilution-to-extinction, given the longstanding assumption that many strictly or facultatively anaerobic chemolithoautotrophs cannot easily form colonies on solid media. We herein describe a simple and cost-effective approach for cultivating these chemolithoautotrophs on solid media. The results obtained suggest that not only the choice of gelling agent, but also the gas phase composition significantly affect the colony-forming ratio of diverse laboratory strains. The use of gellan gum as a gelling agent combined with high concentrations of H
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