Sedimenticola hydrogenitrophicus sp. nov. a chemolithoautotrophic bacterium isolated from a terrestrial mud volcano, and proposal of Sedimenticolaceae fam. nov. in the order Chromatiales

IF 3.3 2区 生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Systematic and applied microbiology Pub Date : 2023-09-01 DOI:10.1016/j.syapm.2023.126451
Galina Slobodkina , Alexander Merkel , Nataliya Ratnikova , Alexandra Kuchierskaya , Alexander Slobodkin
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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 SB48T 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 25568 T = VKM B-3680 T). 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.

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从陆生泥火山中分离的化学-岩石自养细菌Sedimiticola hydrogerophicus sp.nov.和Sedimiticollaceae家族的提议。nov.,按色度顺序排列。
化学-岩石自养微生物在深部地下相关环境中的元素生物地球化学循环中发挥着重要作用。从陆地泥火山(俄罗斯克拉斯诺达尔边疆区)分离到一种新的兼性厌氧岩石自养细菌(菌株SB48T和SN1189)。菌株的细胞是直的运动杆。在高达35°C(最适温度为30°C)、pH 6.0-8.5(最适pH 7.5)和NaCl浓度为0.5-4.0%(w/v)(最适浓度为1.5-2.0%)的温度下观察到生长。分离物以分子氢或硫代硫酸盐为电子供体,硝酸盐为电子受体,CO2/HCO3-为碳源,进行化学-岩石自养生长。它们也用有机酸、乙醇、酵母提取物和蛋白胨生长。这些分离物既能以硝酸盐或一氧化二氮为电子受体进行厌氧呼吸,也能在微需氧条件下进行有氧呼吸。菌株SB48T和SN1189的基因组总大小分别为4.71和5.13Mbp。根据表型和系统发育特征,菌株SB48T和SN1189代表了一个新的Sedimicola属物种,S.hydrogeritrophicus(模式菌株为SB48T=KCTC 25568T=VKM B-3680T)。这些新的分离物是从陆地生态系统中分离出的沉积物属的第一个代表。在系统发育重建的基础上,我们建议将沉香属及其相关属归入一个新的沉香科家族。nov.在Chromatiales阶内。
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来源期刊
Systematic and applied microbiology
Systematic and applied microbiology 生物-生物工程与应用微生物
CiteScore
7.50
自引率
5.90%
发文量
57
审稿时长
22 days
期刊介绍: Systematic and Applied Microbiology deals with various aspects of microbial diversity and systematics of prokaryotes. It focuses on Bacteria and Archaea; eukaryotic microorganisms will only be considered in rare cases. The journal perceives a broad understanding of microbial diversity and encourages the submission of manuscripts from the following branches of microbiology:
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