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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Environmental pollution
卷
262
页码
114274
ISSN
0269-7491
出版者
Ecological Society of America
其它主题
Radiation resistance; Chaetoceros; Polystyrenes; Lipid composition; Galactolipids
语言
英语
类型
Text; Journal Article
2024-02-28
MODS