Symbiotic nutrient cycling enables the long-term survival of Aiptasia in the absence of heterotrophic food sources DOI Creative Commons
Nils Rädecker, Anders Meibom

Peer Community Journal, Journal Year: 2023, Volume and Issue: 3

Published: May 23, 2023

Phototrophic Cnidaria are mixotrophic organisms that can complement their heterotrophic diet with nutrients assimilated by algal endosymbionts. Metabolic models suggest the translocation of photosynthates and derivatives from algae may be sufficient to cover metabolic energy demands host. However, importance heterotrophy nutritional budget these holobionts remains unclear. Here, we report on long-term survival photosymbiotic anemone Aiptasia in absence food sources. Following one year starvation, anemones remained fully viable but showed an 85 % reduction biomass compared regularly fed counterparts. This shrinking was accompanied a host protein content density, indicative severe nitrogen limitation. Nonetheless, isotopic labeling experiments combined NanoSIMS imaging revealed contribution algal-derived metabolism unaffected due increase photosynthesis more efficient carbon translocation. Taken together, our results that, one- timescale, feeding is not essential fulfilling requirements holobiont. But, while symbiotic nutrient cycling effectively retains holobiont over long time scales, data critical source required for growth under oligotrophic conditions.

Language: Английский

Symbiotic nutrient cycling enables the long-term survival of Aiptasia in the absence of heterotrophic food sources DOI Creative Commons
Nils Rädecker, Anders Meibom

Peer Community Journal, Journal Year: 2023, Volume and Issue: 3

Published: May 23, 2023

Phototrophic Cnidaria are mixotrophic organisms that can complement their heterotrophic diet with nutrients assimilated by algal endosymbionts. Metabolic models suggest the translocation of photosynthates and derivatives from algae may be sufficient to cover metabolic energy demands host. However, importance heterotrophy nutritional budget these holobionts remains unclear. Here, we report on long-term survival photosymbiotic anemone Aiptasia in absence food sources. Following one year starvation, anemones remained fully viable but showed an 85 % reduction biomass compared regularly fed counterparts. This shrinking was accompanied a host protein content density, indicative severe nitrogen limitation. Nonetheless, isotopic labeling experiments combined NanoSIMS imaging revealed contribution algal-derived metabolism unaffected due increase photosynthesis more efficient carbon translocation. Taken together, our results that, one- timescale, feeding is not essential fulfilling requirements holobiont. But, while symbiotic nutrient cycling effectively retains holobiont over long time scales, data critical source required for growth under oligotrophic conditions.

Language: Английский

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