FN Archimer Export Format
PT J
TI Production and composition of extracellular polymeric substances by a unicellular strain and natural colonies of Microcystis: Impact of salinity and nutrient stress
BT 
AF REIGNIER, Oceane
   Bormans, Myriam
   MARCHAND, Laetitia
   SINQUIN, Corinne
   AMZIL, Zouher
   ZYKWINSKA, Agata
   BRIAND, Enora
AS 1:1;2:2;3:3;4:3;5:4;6:3;7:1;
FF 1:PDG-ODE-PHYTOX-GENALG;2:;3:PDG-RBE-MASAE-LEMMMB;4:PDG-RBE-MASAE-LEMMMB;5:PDG-ODE-PHYTOX-METALG;6:PDG-RBE-MASAE-LEMMMB;7:PDG-ODE-PHYTOX-GENALG;
C1 PHYTOX, Laboratoire GENALG, IFREMER, Nantes, France
   UMR CNRS 6553 ECOBIO, University of Rennes 1, Rennes, France
   MASAE, Laboratoire EM3B, IFREMER, Nantes, France
   PHYTOX, Laboratoire METALG, IFREMER, Nantes, France
C2 IFREMER, FRANCE
   CNRS, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
SI NANTES
SE PDG-ODE-PHYTOX-GENALG
   PDG-RBE-MASAE-LEMMMB
   PDG-ODE-PHYTOX-METALG
IN WOS Ifremer UPR
   DOAJ
   copubli-france
IF 3.3
TC 2
UR https://archimer.ifremer.fr/doc/00853/96455/104765.pdf
   https://archimer.ifremer.fr/doc/00853/96455/104766.png
   https://archimer.ifremer.fr/doc/00853/96455/104767.png
LA English
DT Article
AB The transfer of toxic cyanobacterial Microcystis blooms from freshwater to estuaries constitutes a serious environmental problem worldwide that is expected to expand in scale and intensity with anthropogenic and climate change. The formation and maintenance of Microcystis in colonial form is conditioned to the presence of extracellular polymeric substances (EPS). In this study, we attempted to better understand how the mucilaginous colonial form of Microcystis evolves under environmental stress conditions. In particular, we studied and compared the production and the composition of EPS fractions (attached and free) from natural colonies of a Microcystis bloom and from a unicellular M. aeruginosa strain under salinity and nutrient stress (representing a land-sea continuum). Our results highlighted a greater production of EPS from the natural colonies of Microcystis than the unicellular one under nutrient and combined stress conditions dominated by the attached form. In comparison to the unicellular Microcystis, EPS produced by the colonial form were characterized by high molecular weight polysaccharides which were enriched in uronic acids and hexosamines, notably for the free fraction in response to increased salinities. This complex extracellular matrix gives the cells the ability to aggregate and allows the colonial cyanobacterial population to cope with osmotic shock. 
PY 2023
PD DEC
SO Environmental Microbiology Reports
SN 1758-2229
PU Wiley Open Access
VL 15
IS 6
UT 001066352700001
BP 783
EP 796
DI 10.1111/1758-2229.13200
ID 96455
ER

EF