Size-dependent oxidative stress effect of nano/micro-scaled polystyrene on Karenia mikimotoi

Zhao, Ting; Tan, Liju; Zhu, Xiaolin; Huang, Wenqiu; Wang, Jiangtao

doi:10.1016/j.marpolbul.2020.111074

Cited by 70 publications

(17 citation statements)

References 51 publications

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“…It was reported that PS microplastics could induce the reduction of the photosynthetic efficiency and increase the ROS content in Chlorella and Scenedesmus cells [125]. In addition, the smaller the particle size, the stronger the oxidative stress reaction was in algal cells, thus inducing more severe lipid peroxidation in cell membrane [101,130,131]. Meanwhile, the activity of antioxidant enzymes such as superoxide dismutase (SOD) and catalase (CAT) will be enhanced to remove ROS, but algal cells will die if the ROS content exceeds their self-repair ability [96,105,128].…”

Section: Toxic Effects Of Microplastics On Marine Microalgaementioning

confidence: 99%

“…Exposed to PVC microplastics (1 µm), the growth of Skeletonema costatum was reported to reduce by 39.7% at 96 h under 50 mg/L treatment [99], and the inhibitory rate for Karenia mikimotoi was 45.8% at 24 h under 100 mg/L treatment [100]. The growth inhibition effect also increased with the decreasing of particle size [101,102]. The inhibition effect of 6 µm PS particles on the growth of Dunaliella tertiolecta was not significant, but it increased by 13% and 57% in the presence of 0.5 µm and 0.05 µm PS particles, respectively [103].…”

Section: Toxic Effects Of Microplastics On Marine Microalgaementioning

confidence: 99%

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Current Progress on Marine Microplastics Pollution Research: A Review on Pollution Occurrence, Detection, and Environmental Effects

Liu

Wang

Zhu

et al. 2021

Water

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Recently, microplastics pollution has attracted much attention in the environmental field, as researchers have found traces of microplastics in both marine and terrestrial ecological environments. Here, we reviewed and discussed the current progress on microplastics pollution in the marine environment from three main aspects including their identification and qualification methods, source and distribution, and fate and toxicity in a marine ecosystem. Microplastics in the marine environment originate from a variety of sources and distribute broadly all around the world, but their quantitative information is still lacking. Up to now, there have been no adequate and standard methods to identify and quantify the various types of microplastics, which need to be developed and unified. The fate of microplastics in the environment is particularly important as they may be transferred or accumulated in the biological chain. Meanwhile, microplastics may have a high adsorption capacity to pollutants, which is the basic research to further study their fate and joint toxicity in the environment. Therefore, all the findings are expected to fill the knowledge gaps in microplastics pollution and promote the development of relative regulations.

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Section: Toxic Effects Of Microplastics On Marine Microalgaementioning

confidence: 99%

Section: Toxic Effects Of Microplastics On Marine Microalgaementioning

confidence: 99%

Current Progress on Marine Microplastics Pollution Research: A Review on Pollution Occurrence, Detection, and Environmental Effects

Liu

Wang

Zhu

et al. 2021

Water

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“…Only a few studies have been performed on the toxic effects of other functional groups. The surface charge of NPs considerably contribute to the toxic mechanisms of NPs (Banerjee and Shelver, 2020;Zhao et al, 2020). Positively charged NPs (PS-NH 2 ) usually induce stronger toxicity than bare NPs and negatively charged NPs (PS-COOH, PS-SO 3 H NPs, and PS-COC).…”

Section: Toxic Mechanism Of Nanoplastics With Different Functional Group Modificationsmentioning

confidence: 99%

Influence of Functional Group Modification on the Toxicity of Nanoplastics

et al. 2022

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Nanoplastics (NPs) are ubiquitous in harvested organisms at various trophic levels, and more concerns on their diverse responses and wide species-dependent sensitivity are continuously increasing. However, systematic study on the toxic effects of NPs with different functional group modifications is still limited. In this review, we gathered and analyzed the toxic effects of NPs with different functional groups on microorganisms, plants, animals, and mammalian/human cells in vitro. The corresponding toxic mechanisms were also described. In general, most up-to-date relevant studies focus on amino (−NH2) or carboxyl (−COOH)-modified polystyrene (PS) NPs, while research on other materials and functional groups is lacking. Positively charged PS-NH2 NPs induced stronger toxicity than negatively charged PS-COOH. Plausible toxicity mechanisms mainly include membrane interaction and disruption, reactive oxygen species generation, and protein corona and eco-corona formations, and they were influenced by surface charges of NPs. The effects of NPs in the long-term exposure and in the real environment world also warrant further study.

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“…A similar difference was also reported in a previous study [32], that showed that the small-size MP (0.05 µm) could significantly inhibit the growth of microalgae Dunaliella tertiolacta, while the large-size MP (6 µm) had no significant effect. Generally, the smaller size of MP particles caused the higher toxicity [12,16,32]. Smaller particles may be more easily adsorbed on the surface of microalgal cells to inhibit their growth, such as embedding in microalgal cells, blocking microalgal pores or gas exchanges [13,33].…”

Section: Microalgal Growthmentioning

confidence: 99%

“…Microplastic beads can wrap around the surface of microalgae Chlamydomonas reinhardtii and damage their membranes, thus affecting their growth and photosynthetic efficiency [15]. The exposure of polystyrene MP had negative effects on the growth, oxidative stress and cell micro-structure of Karenia mikimotoi [16]. Microplastics can cause dysregulation of gene expression in microalgae Euglena gracilis involved in cellular processes, genetic information processing, biological systems and metabolism [17].…”

Section: Introductionmentioning

confidence: 99%

Effects of Polystyrene Microplastics on Growth and Toxin Production of Alexandrium pacificum

Liu

Qiu

Tang

et al. 2021

Toxins

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Microplastics (MP) widely distributed in aquatic environments have adverse effects on aquatic organisms. Currently, the impact of MP on toxigenic red tide microalgae is poorly understood. In this study, the strain of Alexandriumpacificum ATHK, typically producing paralytic shellfish toxins (PST), was selected as the target. Effects of 1 and 0.1 μm polystyrene MP with three concentration gradients (5 mg L−1, 25 mg L−1 and 100 mg L−1) on the growth, chlorophyll a (Chl a), photosynthetic activity (Fv/Fm) and PST production of ATHK were explored. Results showed that the high concentration (100 mg L−1) of 1 μm and 0.1 μm MP significantly inhibited the growth of ATHK, and the inhibition depended on the size and concentration of MP. Contents of Chl a showed an increase with various degrees after MP exposure in all cases. The photosynthesis indicator Fv/Fm of ATHK was significantly inhibited in the first 11 days, then gradually returned to the level of control group at day 13, and finally was gradually inhibited in the 1 μm MP treatments, and promotion or inhibition to some degree also occurred at different periods after exposure to 0.1 μm MP. Overall, both particle sizes of MP at 5 and 25 mg L−1 had no significant effect on cell toxin quota, and the high concentration 100 mg L−1 significantly promoted the PST biosynthesis on the day 7, 11 and 15. No significant difference occurred in the cell toxin quota and the total toxin content in all treatments at the end of the experiment (day 21). All MP treatments did not change the toxin profiles of ATHK, nor did the relative molar percentage of main PST components. The growth of ATHK, Chl a content, Fv/Fm and toxin production were not affected by MP shading. This is the first report on the effects of MP on the PST-producing microalgae, which will improve the understanding of the adverse impact of MP on the growth and toxin production of A. pacificum.

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Size-dependent oxidative stress effect of nano/micro-scaled polystyrene on Karenia mikimotoi

Cited by 70 publications

References 51 publications

Current Progress on Marine Microplastics Pollution Research: A Review on Pollution Occurrence, Detection, and Environmental Effects

Current Progress on Marine Microplastics Pollution Research: A Review on Pollution Occurrence, Detection, and Environmental Effects

Influence of Functional Group Modification on the Toxicity of Nanoplastics

Effects of Polystyrene Microplastics on Growth and Toxin Production of Alexandrium pacificum

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