ArticleMicrobes and environments2018
Phylogenetic Diversity of Nitrogenase Reductase Genes and Possible Nitrogen-Fixing Bacteria in Thermophilic Chemosynthetic Microbial Communities in Nakabusa Hot Springs.
Article in Microbes and environments, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
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19 citing papers in PubMed.
- Highly diverse diazotrophs drive high NFundamental research · 2026Article
- Untapped Microbial Diversity, Assemblages, and Interactions in Rwandan Geothermal Spring Mats, Africa.Current microbiology · 2026Article
- Identification of key steps in the evolution of anaerobic methanotrophy inScience advances · 2025Article
- Bacterial diversity along the geothermal gradients: insights from the high-altitude Himalayan hot spring habitats of Sikkim.Current research in microbial sciences · 2024Article
- Insights on Microbial Communities Inhabiting Non-Volcanic Hot Springs.International journal of molecular sciences · 2022Article
- Metagenomic analysis of microbial community structure and function in a improved biofilter with odorous gases.Scientific reports · 2022Article
- Microbial ecology of a shallow alkaline hydrothermal vent: Strýtan Hydrothermal Field, Eyjafördur, northern Iceland.Frontiers in microbiology · 2022Article
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- A potential microbiological approach to the evaluation of earthquake-induced soil liquefaction.iScience · 2021Article
- In-Situ Metatranscriptomic Analyses Reveal the Metabolic Flexibility of the Thermophilic Anoxygenic Photosynthetic BacteriumMicroorganisms · 2021Article
- Exploring the taxonomical and functional profile of As Burgas hot spring focusing on thermostable β-galactosidases.Scientific reports · 2021Article
- Nitrogen-fixing Ability and Nitrogen Fixation-related Genes of Thermophilic Fermentative Bacteria in the Genus Caldicellulosiruptor.Microbes and environments · 2021Article
- Genotypic Variation of Endophytic Nitrogen-Fixing Activity and Bacterial Flora in Rice Stem Based on Sugar Content.Frontiers in plant science · 2021Article
- Composition and predicted functions of the bacterial community in spouting pool sediments from the El Tatio Geyser field in Chile.Archives of microbiology · 2021Article
- Microorganisms and Their Metabolic Capabilities in the Context of the Biogeochemical Nitrogen Cycle at Extreme Environments.International journal of molecular sciences · 2020Review
- Vertical Distribution and Diversity of Phototrophic Bacteria within a Hot Spring Microbial Mat (Nakabusa Hot Springs, Japan).Microbes and environments · 2019Article
- The Nitrogen Cycle: A Large, Fast, and Mystifying Cycle.Microbes and environments · 2019Article
- Symbiotic Growth of a Thermophilic Sulfide-Oxidizing Photoautotroph and an Elemental Sulfur-Disproportionating Chemolithoautotroph and Cooperative Dissimilatory Oxidation of Sulfide to Sulfate.Frontiers in microbiology · 2019Article
- Nitrogenase Activity in Thermophilic Chemolithoautotrophic Bacteria in the Phylum Aquificae Isolated under Nitrogen-Fixing Conditions from Nakabusa Hot Springs.Microbes and environments · 2018Article
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5 authors.
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Abstract
Chemosynthetic microbial communities develop and form dense cell aggregates in slightly alkaline sulfidic hot springs in the temperature range of 70-86°C at Nakabusa, Japan. Nitrogenase activity has recently been detected in the microbial communities collected. To identify possible members capable of nitrogen fixation, we examined the diversities of 16S rRNA and nitrogenase reductase (NifH) gene sequences in four types of chemosynthetic communities with visually different colors and thicknesses. The results of a 16S rRNA gene analysis indicated that all four microbial communities had similar bacterial constituents; the phylum Aquificae was the dominant member, followed in abundance by Thermodesulfobacteria, Firmicutes, and Thermotogae. Most of the NifH sequences were related to sequences reported in hydrothermal vents and terrestrial hot springs. The results of a phylogenetic analysis of NifH sequences revealed diversity in this gene among the communities collected, distributed within 7 phylogenetic groups. NifH sequences affiliated with Aquificae (Hydrogenobacter/Thermocrinis) and Firmicutes (Caldicellulosiruptor) were abundant. At least two different energy metabolic pathways appeared to be related to nitrogen fixation in the communities analyzed; aerobic sulfur/hydrogen-oxidizing bacteria in Aquificae and fermentative bacteria in Firmicutes. The metabolic characteristics of these two dominant phyla differed from those previously inferred from nitrogenase activity assays on chemosynthetic communities, which were associated with hydrogen-dependent autotrophic sulfate reduction. These assays may correspond to the observed NifH sequences that are distantly related to the known species of Thermodesulfovibrio sp. (Nitrospirae) detected in the present study. The activities of nitrogen-fixing organisms in communities may depend on redox states as well as the availability of electron donors, acceptors, and carbon sources.
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