FN Archimer Export Format
PT J
TI Do transparent exopolymeric particles (TEP) affect the toxicity of nanoplastics on Chaetoceros neogracile?
BT 
AF González-Fernández, Carmen
   Toullec, Jordan
   Lambert, Christophe
   Le Goïc, Nelly
   Seoane, Marta
   Moriceau, Brivaela
   Huvet, Arnaud
   Berchel, Mathieu
   Vincent, Dorothée
   Courcot, Lucie
   Soudant, Philippe
   Paul-Pont, Ika
AS 1:5;2:1;3:5;4:5;5:;6:5;7:2;8:3;9:4;10:4;11:5;12:5;
FF 1:;2:;3:;4:;5:;6:;7:PDG-RBE-PFOM-LPI;8:;9:;10:;11:;12:;
C1 Laboratoire des Sciences de L’Environnement Marin (LEMAR), UMR 6539 CNRS/UBO/IRD/IFREMER, Institut Universitaire Européen de La Mer (IUEM), Rue Dumont D’Urville, 29280, Plouzané, France
   Ifremer, Laboratoire des Sciences de L’Environnement Marin (LEMAR), CS 10070, 29280, Plouzané, France
   CEMCA, UMR CNRS 6521, IBSAM, UFR Sciences, Université de Bretagne Occidentale, 6 Avenue Victor Le Gorgeu, 29238, Brest, France
   Univ. Littoral Côte D’Opale, Univ. Lille, CNRS, UMR 8187, LOG, Laboratoire D’Océanologie et de Géosciences, 32 Avenue Foch, F-62930, Wimereux, France
C2 UBO, FRANCE
   IFREMER, FRANCE
   UBO, FRANCE
   UNIV LITTORAL COTE D'OPALE, FRANCE
   CNRS, FRANCE
SI BREST
SE PDG-RBE-PFOM-LPI
UM LEMAR
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 6.792
TC 42
UR https://archimer.ifremer.fr/doc/00491/60235/63627.pdf
LA English
DT Article
DE ;Nanoplastics;Diatoms;Physiology;Transparent exopolymer particles
AB The potential presence of nanoplastics (NP) in aquatic environments represents a growing concern regarding their possible effects on aquatic organisms. The objective of this study was to assess the impact of polystyrene (PS) amino-modified particles (50  nm PSNH2) on the cellular and metabolic responses of the diatom Chaetoceros neogracile cultures at two essential phases of the growth cycle, i.e. exponential (division) and stationary (storage) phases. Both cultures were exposed for 4 days to low (0.05 μg mL−1) and high (5 μg mL−1) concentrations of PS-NH2. Exposure to NP impaired more drastically the major cellular and physiological parameters during exponential phase than during the stationary phase. Only an increase in ROS production was observed at both culture phases following NP exposures. In exponential phase cultures, large decreases in chlorophyll content, esterase activity, cellular growth and photosynthetic efficiency were recorded upon NP exposure, which could have consequences on the diatoms life cycle and higher food-web levels. The observed differential responses to NP exposure according to culture phase could reflect i) the higher concentration of Transparent Exopolymer Particles (TEP) at stationary phase leading to NP aggregation and thus, probably minimizing NP effects, and/or ii) the fact that dividing cells during exponential phase may be intrinsically more sensitive to stress. This work evidenced the importance of algae physiological state for assessing the NP impacts with interactions between NP and TEP being one key factor affecting the fate of NP in algal media and their impact to algal’ cells. 
PY 2019
PD JUN
SO Environmental Pollution
SN 0269-7491
PU Elsevier BV
VL 250
UT 000471088200093
BP 873
EP 882
DI 10.1016/j.envpol.2019.04.093
ID 60235
ER

EF