Ecotoxicity and genotoxicity of polystyrene microplastics on higher plant Vicia faba (CROSBI ID 263340)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Jiang, Xiaofeng ; Chen, Hao ; Liao, Yuanchen ; Ye, Ziqi ; Li, Mei ; Klobučar, Göran
engleski
Ecotoxicity and genotoxicity of polystyrene microplastics on higher plant Vicia faba
Nano- and microplastics have been widely spread in environmental matrices, especially in marine and terrestrial systems. In this study, higher plant Vicia faba root tips were exposed to 5 μm and 100 nm with 10, 50 and 100 mg/L polystyrene fluorescent microplastics (PS-MPs) for 48h. Root length, weight, oxidative stress and genotoxicity of V. faba were assessed to investigate toxic effects of PS-MPs. The results showed that the biomass and catalase (CAT) enzymes activity of V. faba roots decreased under 5 μm PS-MPs whereas superoxide dismutase (SOD) and peroxidase (POD) enzymes activity significantly increased. Under the 100 nm PS-MPs exposure a significant decrease of growth was observed only at the highest concentration (100 mg/L). However, micronucleus (MN) test and antioxidative enzymes activities showed that 100 nm PS-MPs induce higher genotoxic and oxidative damage to V. faba than 5 μm PS-MPs. Furthermore, the laser confocal scanning microscopy (LCSM) demonstrated that 100 nm PS-MPs can accumulate in V. faba root and most probably block cell connections or cell wall pores for transport of nutrients. These findings provide a new insight into the toxic effects of microplastics on V. faba, and further apply to the ecological risk assessment of microplastics on higher plants.
Microplastics ; Higher plant ; Vicia faba ; Oxidative damage ; Genotoxicity ; Ecological risk assessment
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Podaci o izdanju
250
2019.
831-838
objavljeno
0269-7491
1873-6424
10.1016/j.envpol.2019.04.055