ArticleFEMS microbiology ecology2021
Anoxygenic photo- and chemo-synthesis of phototrophic sulfur bacteria from an alpine meromictic lake.
Article in FEMS microbiology ecology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 25 citations in OpenAlex.
- Genomics, transcriptomics, and laboratory experiments link bioconvection to nitrogen fixation.Frontiers in microbiology · 2026Article
- Active microbial communities and their extrachromosomal elements link organic matter degradation to methane cycling in anoxic sediments.ISME communications · 2026Article
- Physically stable yet biologically sensitive: multiyear ecological dynamics of anoxygenic phototrophs in stably redox-stratified Lake Cadagno.Aquatic sciences · 2025Article
- Anoxygenic photosynthesis with emphasis on green sulfur bacteria and a perspective for hydrogen sulfide detoxification of anoxic environments.Frontiers in microbiology · 2024Review
- Synergistic phenotypic adaptations of motile purple sulphur bacteria Chromatium okenii during lake-to-laboratory domestication.PloS one · 2024Article
- A Novel View of the Diversity of Anoxygenic Phototrophic Bacteria Inhabiting the Chemocline of Meromictic Karst Lakes.Microorganisms · 2023Article
- Distinct Non-conservative Behavior of Dissolved Organic Matter after Mixing Solimões/Negro and Amazon/Tapajós River Waters.ACS ES&T water · 2023Article
- Genomic insights into the coupling of a Chlorella-like microeukaryote and sulfur bacteria in the chemocline of permanently stratified Lake Cadagno.The ISME journal · 2023Article
- Motile bacteria leverage bioconvection for eco-physiological benefits in a natural aquatic environment.Frontiers in microbiology · 2023Article
- Article
- Single-cell genomics-based analysis reveals a vital ecological role ofMicrobial genomics · 2021Article
- Purple sulfur bacteria fix NNature communications · 2021Article
- Vertical structure of the bacterial diversity in meromictic Fayetteville Green Lake.MicrobiologyOpen · 2021Article
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Meromictic lakes are interesting ecosystems to study anaerobic microorganisms due their permanent stratification allowing the formation of a stable anoxic environment. The crenogenic meromictic Lake Cadagno harbors an important community of anoxygenic phototrophic sulfur bacteria responsible for almost half of its total productivity. Besides their ability to fix CO2 through photosynthesis, these microorganisms also showed high rates of dark carbon fixation via chemosyntesis. Here, we grew in pure cultures three populations of anoxygenic phototrophic sulfur bacteria previously isolated from the lake, accounting for 72.8% of the total microbial community and exibiting different phenotypes: (1) the motile, large-celled purple sulfur bacterium (PSB) Chromatium okenii, (2) the small-celled PSB Thiodictyon syntrophicum and (3) the green sulfur bacterium (GSB) Chlorobium phaeobacteroides. We measured their ability to fix CO2 through photo- and chemo-synthesis, both in situ in the lake and in laboratory under different incubation conditions. We also evaluated the efficiency and velocity of H2S photo-oxidation, an important reaction in the anoxygenic photosynthesis process. Our results confirm that phototrophic sulfur bacteria strongly fix CO2 in the presence of light and that oxygen increases chemosynthesis at night, in laboratory conditions. Moreover, substancial differences were displayed between the three selected populations in terms of activity and abundance.
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