ArticleMicrobial biotechnology2023
Microbial photoelectrosynthesis: Feeding purple phototrophic bacteria electricity to produce bacterial biomass.
Article in Microbial biotechnology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Metabolic pathways to sustainability: review of purple non-sulfur bacteria potential in agri-food waste valorization.Frontiers in bioengineering and biotechnology · 2025Review
- Purple non-sulfur bacteria for biotechnological applications.Journal of industrial microbiology & biotechnology · 2024Review
- Microbial photoelectrosynthesis: Feeding purple phototrophic bacteria electricity to produce bacterial biomass.Microbial biotechnology · 2023Article
- Exploiting synergies between microbial electrochemical technologies and synthetic biology.Microbial biotechnology · 2023Article
- Fluid-like cathode enhances valuable biomass production from brewery wastewater in purple phototrophic bacteria.Frontiers in microbiology · 2023Article
Corrections and comments
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Purple phototrophic bacteria are one of the main actors in chemolithotrophic carbon fixation and, therefore, fundamental in the biogeochemical cycle. These microbes are capable of using insoluble electron donors such as ferrous minerals or even carbon-based electrodes. Carbon fixation through extracellular electron uptake places purple phototrophic bacteria in the field of microbial electrosynthesis as key carbon capturing microorganisms. In this work we demonstrate biomass production dominated by purple phototrophic bacteria with a cathode (-0.6 V vs. Ag/AgCl) as electron donor. In addition, we compared the growth and microbial population structure with ferrous iron as the electron donor. We detect interaction between the cathode and the consortium showing a midpoint potential of 0.05 V (vs. Ag/AgCl). Microbial community analyses revealed different microbial communities depending on the electron donor, indicating different metabolic interactions. Electrochemical measurements together with population analyses point to Rhodopseudomonas genus as the key genus in the extracellular electron uptake. Furthermore, the genera Azospira and Azospirillum could play a role in the photoelectrotrophic consortium.
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Registered trials
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