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Toxicities of polystyrene nano- and microplastics toward marine bacterium Halomonas alkaliphila

The Science of The Total Environment 2018 364 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Xuemei Sun, Lin Zhu, Lin Zhu, Xuemei Sun, Xuemei Sun, Xuemei Sun, Xuemei Sun, Xuemei Sun, Bin Xia, Bin Xia, Lin Zhu, Bin Xia, Bijuan Chen, Bijuan Chen, Bijuan Chen, Xuemei Sun, Lin Zhu, Nan Liu Xuemei Sun, Bin Xia, Lin Zhu, Lin Zhu, Xuemei Sun, Bin Xia, Xuemei Sun, Bin Xia, Bijuan Chen, Bijuan Chen, Bijuan Chen, Qiufen Li, Xuemei Sun, Xuemei Sun, Qiufen Li, Bijuan Chen, Xuemei Sun, Bijuan Chen, Lin Zhu, Lin Zhu, Lin Zhu, Nan Liu Lin Zhu, Lin Zhu, Lin Zhu, Lin Zhu, Lin Zhu, Nan Liu Xuemei Sun, Xuemei Sun, Bin Xia, Xuemei Sun, Xuemei Sun, Lin Zhu, Lin Zhu, Lin Zhu, Lin Zhu, Xuemei Sun, Bin Xia, Keming Qu, Keming Qu, Keming Qu, Lin Zhu, Bin Xia, Bin Xia, Lin Zhu, Bin Xia, Lin Zhu, Bijuan Chen, Xuemei Sun, Lin Zhu, Bin Xia, Bin Xia, Lin Zhu, Bijuan Chen, Lin Zhu, Bijuan Chen, Bin Xia, Lin Zhu, Nan Liu Bijuan Chen, Keming Qu, Keming Qu, Lin Zhu, Bijuan Chen, Bijuan Chen, Bin Xia, Lin Zhu, Bin Xia, Lin Zhu, Bin Xia, Keming Qu, Bin Xia, Bin Xia, Bin Xia, Bin Xia, Xuemei Sun, Bin Xia, Keming Qu, Keming Qu, Keming Qu, Keming Qu, Keming Qu, Keming Qu, Xuemei Sun, Bin Xia, Xuemei Sun, Keming Qu, Bin Xia, Lin Zhu, Bin Xia, Keming Qu, Bin Xia, Bijuan Chen, Bin Xia, Bin Xia, Bin Xia, Bijuan Chen, Bijuan Chen, Keming Qu, Keming Qu, Keming Qu, Nan Liu Keming Qu, Nan Liu

Summary

Polystyrene nano- and microplastics were found to be toxic to the marine bacterium Halomonas alkaliphila, with nanoplastics causing more severe membrane damage and oxidative stress than microplastics of equivalent mass. The results highlight that nanoplastics may pose greater risks to marine microbial communities than larger particles, with potential cascading effects on ocean biogeochemical cycles.

Polymers

Nano- and microplastics have been shown to cause negative effects on marine organisms. However, the toxicities of nano- and microplastics toward marine bacteria are poorly understood. In this study, we investigated the toxic effects of polystyrene nano- and microplastics on the marine bacterium Halomonas alkaliphila by determining growth inhibition, chemical composition, inorganic nitrogen conversion efficiencies and reactive oxygen species (ROS) generation. The results showed that both nano- and microplastics inhibited the growth of H. alkaliphila in high concentrations, while nanoplastics rather than microplastics influenced the growth inhibition, chemical composition and ammonia conversion efficiencies of H. alkaliphila at concentration of 80 mg/L. The ROS generation indicated oxidative stress induced by nano- but not microplastics, and the oxidative stress induced by nanoplastics may provide a significant effect on bacteria. Furthermore, the positively charged nanoplastics (amine-modified 50 nm) induced higher oxidative stress toward bacteria than that induced by negatively charged nanoplastics (non-modified 55 nm). The increased extracellular polymeric substances as evidenced by transmission electron microscope (TEM) observation suggested the possible bacterial protective mechanisms. The present study illustrates for the first time the impact of plastics debris on the inorganic nitrogen conversion efficiencies of marine bacteria. Our findings highlight the effects of microplastics on the ecological function of marine organisms.

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