FN Archimer Export Format
PT J
TI Bacteria enhance the production of extracellular polymeric substances by the green dinoflagellate Lepidodinium chlorophorum
BT 
AF Roux, Pauline
   Siano, Raffaele
   Collin, Karine
   Bilien, Gwenael
   Sinquin, Corinne
   MARCHAND, Laetitia
   Zykwinska, Agata
   Delbarre-Ladrat, Christine
   Schapira, Mathilde
AS 1:1;2:2;3:1;4:3;5:4;6:4;7:4;8:4;9:1;
FF 1:PDG-ODE-LITTORAL-LERMPL;2:PDG-ODE-DYNECO-PELAGOS;3:PDG-ODE-LITTORAL-LERMPL;4:PDG-ODE-LITTORAL-LERBO;5:PDG-RBE-BRM-LEMMMB;6:PDG-RBE-BRM-LEMMMB;7:PDG-RBE-BRM-LEMMMB;8:PDG-RBE-BRM-LEMMMB;9:PDG-ODE-LITTORAL-LERMPL;
C1 Ifremer, LITTORAL, 44300, Nantes, France
   Ifremer, DYNECO, 29280, Plouzané, France
   Ifremer, LITTORAL, 29900, Concarneau, France
   Ifremer, BRM, 44300, Nantes, France
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
SI NANTES
   BREST
   CONCARNEAU
SE PDG-ODE-LITTORAL-LERMPL
   PDG-ODE-DYNECO-PELAGOS
   PDG-ODE-LITTORAL-LERBO
   PDG-RBE-BRM-LEMMMB
IN WOS Ifremer UPR
   DOAJ
IF 4.997
TC 6
UR https://archimer.ifremer.fr/doc/00682/79403/81948.pdf
   https://archimer.ifremer.fr/doc/00682/79403/81949.pdf
LA English
DT Article
AB 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 exopolysaccharide sulphated galactan, slightly increased in pseudo-axenic cultures. The amount of Transparent Exopolymer Particles (TEP) per cell increased under non-axenic conditions. Despite the high concentrations of Particulate Organic Carbon (POC) measured, viscosity did not vary. These results suggest that the L. chlorophorum-bacteria interaction could have a detrimental consequence on the dinoflagellate, translating in a negative effect on L. chlorophorum growth, as well as EPS overproduction by the dinoflagellate, at concentrations that should not affect seawater viscosity. 
PY 2021
PD FEB
SO Scientific Reports
SN 2045-2322
PU Springer Science and Business Media LLC
VL 11
IS 1
UT 000626626300010
DI 10.1038/s41598-021-84253-2
ID 79403
ER

EF