Nanoplastics exposure modulate lipid and pigment compositions in diatoms

Type Article
Date 2020-07
Language English
Author(s) Gonzalez-Fernandez Carmen1, 4, Le Grand Fabienne2, Bideau Antoine4, Huvet ArnaudORCID3, Paul-Pont Ika2, Soudant Philippe2
Affiliation(s) 1 : Fish Innate Immune System Group, Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100, Murcia, Spain
2 : Laboratoire des Sciences de l’Environnement Marin (LEMAR), Univ. Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
3 : Ifremer, Laboratoire des Sciences de l’Environnement Marin (LEMAR), CS 10070, 29280, Plouzané, France
4 : Laboratoire des Sciences de l’Environnement Marin (LEMAR), Univ. Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
Source Environmental Pollution (0269-7491) (Elsevier BV), 2020-07 , Vol. 262 , P. 114274 (10p.)
DOI 10.1016/j.envpol.2020.114274
WOS© Times Cited 6
Keyword(s) Diatoms, Nanoplastics, Lipid composition, Pigments
Abstract

The impact of nanoplastics (NP) using model polystyrene nanoparticles amine functionalized (PS–NH2) has been investigated on pigment and lipid compositions of the marine diatom Chaetoceros neogracile, at two growth phases using a low (0.05 μg mL−1) and a high (5 μg mL−1) concentrations for 96 h. Results evidenced an impact on pigment composition associated to the light-harvesting function and photoprotection mainly at exponential phase. NP also impacted lipid composition of diatoms with a re-adjustment of lipid classes and fatty acids noteworthy. Main changes upon NP exposure were observed in galactolipids and triacylglycerol's at both growth phases affecting the thylakoids membrane structure and cellular energy reserve of diatoms. Particularly, exponential cultures exposed to high NP concentration showed an impairment of long chain fatty acids synthesis. Changes in pigment and lipid content of diatom’ cells revealed that algae physiology is determinant in the way cells adjust their thylakoid membrane composition to cope with NP contamination stress. Compositions of reserve and membrane lipids are proposed as sensitive markers to assess the impact of NP exposure, including at potential predicted environmental doses, on marine organisms.

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