Influence of bacteria on the response of microalgae to contaminant mixtures
- Fouilland, Eric
- Gales, Amandine
- Beaugelin, Ines
- Lanouguere, Elodie
- Pringault, Olivier
- Leboulanger, Christophe
DOIAbstract
When microalgae are exposed to contaminants, the role of associated bacteria within the phycosphere, the microenvironment surrounding algal cells, remains largely unknown. The present study investigated the importance of algae-associated bacteria on the responses of microalgae growth to metallic and organic toxicant exposure. The effects of a polluted sediment elutriate, and of metal or pesticide mixtures at environmentally relevant concentrations (<10 μg L−1) were assessed on the growth of two microalgae strains: Isochrysis galbana, a prymnesiophyte, and Thalassiosira delicatula, a centric diatom. Both cultures were maintained as axenic or bacterized under similar conditions in batch cultures. In axenic conditions, the metal mixture additi...
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