Osmotrophic glucose and leucine assimilation and its impact on EPA and DHA content in algae.

ABSTRACT: The uptake of dissolved organic compounds, that is, osmotrophy, has been shown to be an efficient nutritional strategy for algae. However, this mode of nutrition may affect the biochemical composition, for example, the fatty acid (FA) contents, of algal cells. This study focused on the osmotrophic assimilation of glucose and leucine by selected seven algal strains belonging to chlorophytes, chrysophytes, cryptophytes, dinoflagellates and euglenoids. Our laboratory experiments with stable isotope labeling showed that osmotrophy occurred in four of the selected seven strains. However, only three of these produced long chain omega-3 FAs eicosapentaenoic acid (EPA; 20:5ω3) and docosahexaenoic acid (DHA; 22:6ω3). High glucose content (5 mg L^-1) affected negatively on the total FAs of

SUBMITTER: Peltomaa ET 

PROVIDER: S-EPMC6944096 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature