Bacteria enhance the production of extracellular polymeric substances by the green dinoflagellate Lepidodinium chlorophorum.

ABSTRACT: High biomasses of the marine dinoflagellate Lepidodinium chlorophorum cause green seawater discolorations along Southern Brittany (NE Atlantic, France). The viscosity associated to these phenomena has been related to problems in oyster cultivation. The harmful effect of L. chlorophorum might originate from the secretion of Extracellular Polymeric Substances (EPS). To understand whether the EPS are produced by L. chlorophorum or its associated bacteria, or if they are a product of their interaction, batch cultures were performed under non-axenic and pseudo-axenic conditions for three strains. Maximum dinoflagellate cell abundances were observed in pseudo-axenic cultures. The non-sinking fraction of polymers (Soluble Extracellular Polymers, SEP), mainly composed of proteins and the exopolysa

SUBMITTER: Roux P 

PROVIDER: S-EPMC7910647 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature