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Response of aerobic anoxygenic phototrophic bacteria to limitation and availability of organic carbon.
Piwosz, Kasia; Villena-Alemany, Cristian; Calkiewicz, Joanna; Mujakic, Izabela; Náhlík, Vít; Dean, Jason; Koblízek, Michal.
Afiliación
  • Piwosz K; Department of Fisheries Oceanography and Marine Ecology, National Marine Fisheries Research Institute, 81-332 Gdynia, Poland.
  • Villena-Alemany C; Laboratory of Anoxygenic Phototrophs, Institute of Microbiology of the Czech Academy of Sciences, 379 01 Trebon, Czechia.
  • Calkiewicz J; Department of Fisheries Oceanography and Marine Ecology, National Marine Fisheries Research Institute, 81-332 Gdynia, Poland.
  • Mujakic I; Laboratory of Anoxygenic Phototrophs, Institute of Microbiology of the Czech Academy of Sciences, 379 01 Trebon, Czechia.
  • Náhlík V; Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, University of South Bohemia, 389 25 Ceské Budejovice, Czechia.
  • Dean J; Laboratory of Anoxygenic Phototrophs, Institute of Microbiology of the Czech Academy of Sciences, 379 01 Trebon, Czechia.
  • Koblízek M; Laboratory of Anoxygenic Phototrophs, Institute of Microbiology of the Czech Academy of Sciences, 379 01 Trebon, Czechia.
FEMS Microbiol Ecol ; 100(7)2024 Jun 17.
Article en En | MEDLINE | ID: mdl-38886127
ABSTRACT
Aerobic anoxygenic phototrophic (AAP) bacteria are an important component of freshwater bacterioplankton. They can support their heterotrophic metabolism with energy from light, enhancing their growth efficiency. Based on results from cultures, it was hypothesized that photoheterotrophy provides an advantage under carbon limitation and facilitates access to recalcitrant or low-energy carbon sources. However, verification of these hypotheses for natural AAP communities has been lacking. Here, we conducted whole community manipulation experiments and compared the growth of AAP bacteria under carbon limited and with recalcitrant or low-energy carbon sources under dark and light (near-infrared light, λ > 800 nm) conditions to elucidate how they profit from photoheterotrophy. We found that AAP bacteria induce photoheterotrophic metabolism under carbon limitation, but they overcompete heterotrophic bacteria when carbon is available. This effect seems to be driven by physiological responses rather than changes at the community level. Interestingly, recalcitrant (lignin) or low-energy (acetate) carbon sources inhibited the growth of AAP bacteria, especially in light. This unexpected observation may have ecosystem-level consequences as lake browning continues. In general, our findings contribute to the understanding of the dynamics of AAP bacteria in pelagic environments.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Carbono / Procesos Fototróficos Idioma: En Revista: FEMS Microbiol Ecol Año: 2024 Tipo del documento: Article País de afiliación: Polonia Pais de publicación: Reino Unido
Texto completo
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Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Carbono / Procesos Fototróficos Idioma: En Revista: FEMS Microbiol Ecol Año: 2024 Tipo del documento: Article País de afiliación: Polonia Pais de publicación: Reino Unido