Trophic state alters the mechanism whereby energetic coupling between photosynthesis and respiration occurs in Euglena gracilis.

ABSTRACT: The coupling between mitochondrial respiration and photosynthesis plays an important role in the energetic physiology of green plants and some secondary-red photosynthetic eukaryotes (diatoms), allowing an efficient CO₂ assimilation and optimal growth. Using the flagellate Euglena gracilis, we first tested if photosynthesis-respiration coupling occurs in this species harbouring secondary green plastids (i.e. originated from an endosymbiosis between a green alga and a phagotrophic euglenozoan). Second, we tested how the trophic state (mixotrophy and photoautotrophy) of the cell alters the mechanisms involved in the photosynthesis-respiration coupling. Energetic coupling between photosynthesis and respiration was determined by testing the effect of respiratory inhibitors on photos

SUBMITTER: Gain G 

PROVIDER: S-EPMC9292222 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature