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Visual tracking of label-free microplastics in wheat seedlings and their effects on crop growth and physiology

Journal of Hazardous Materials 2023 83 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 55 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Chen Tu, Chen Tu, Chen Tu, Chen Tu, Jie Yang, Jie Yang, Jie Yang, Yudong Feng, Ruijie Li, Lianzhen Li Jie Yang, Yongming Luo, Lianzhen Li Yongming Luo, Yongming Luo, Ruijie Li, Chen Tu, Chen Tu, Lianzhen Li Chen Tu, Yudong Feng, Chen Tu, Lianzhen Li Ruijie Li, Chen Tu, Yongming Luo, Lianzhen Li Yongming Luo, Ruijie Li, Yongming Luo, Chen Tu, Chen Tu, Jie Yang, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Lianzhen Li Chen Tu, Chen Tu, Yudong Feng, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Lianzhen Li Chen Tu, Yudong Feng, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Lianzhen Li Lianzhen Li Lianzhen Li Jie Yang, Jie Yang, Yudong Feng, Lianzhen Li Lianzhen Li Lianzhen Li Lianzhen Li Lianzhen Li Lianzhen Li Ruijie Li, Ruijie Li, Ruijie Li, Ruijie Li, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Yongming Luo, Chen Tu, Jie Yang, Ruijie Li, Lianzhen Li Lianzhen Li Xinyao Wang, Xinyao Wang, Ruijie Li, Yongming Luo, Ruijie Li, Jie Yang, Yongming Luo, Yongming Luo, Ruijie Li, Lianzhen Li Jie Yang, Chen Tu, Yongming Luo, Jie Yang, Jie Yang, Yongming Luo, Chen Tu, Chen Tu, Chen Tu, Yudong Feng, Chen Tu, Chen Tu, Jie Yang, Lianzhen Li Chen Tu, Yongming Luo, Jie Yang, Jie Yang, Chen Tu, Chen Tu, Jie Yang, Jie Yang, Yongming Luo, Ruijie Li, Ruijie Li, Chen Tu, Lianzhen Li Yudong Feng, Lianzhen Li Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Lianzhen Li Chen Tu, Yongming Luo, Lianzhen Li Chen Tu, Chen Tu, Jie Yang, Yongming Luo, Chen Tu, Chen Tu, Chen Tu, Jie Yang, Chen Tu, Chen Tu, Yongming Luo, Zhu Xia, Zhu Xia, Chen Tu, Yongming Luo, Yongming Luo, Chen Tu, Chen Tu, Qiaohui Fan, Yongming Luo, Yongming Luo, Yongming Luo, Yongming Luo, Yongming Luo, Chen Tu, Lianzhen Li Lianzhen Li Chen Tu, Qiaohui Fan, Qiaohui Fan, Yongming Luo, Yongming Luo, Yongming Luo, Chen Tu, Chen Tu, Lianzhen Li Chen Tu, Chen Tu, Lianzhen Li Yongming Luo, Yongming Luo, Yongming Luo, Qiaohui Fan, Jie Yang, Chen Tu, Yongming Luo, Chen Tu, Yongming Luo, Yongming Luo, Lianzhen Li

Summary

Researchers used advanced microscopy to visually track label-free polystyrene microplastics as they moved through wheat seedlings from roots to shoots via the plant's water-transport system. At lower concentrations, the microplastics actually increased water uptake in roots, but at higher concentrations they significantly reduced chlorophyll and carotenoid levels. The study provides direct visual evidence that crop plants can absorb and transport microplastics, with potential consequences for plant health and food safety.

Polymers

The effects of microplastics on crop plants have attracted growing attention. However, little is known about the effects of microplastics and their extracts on the growth and physiology of wheat seedlings. In this study, hyperspectral-enhanced dark field microscopy and scanning electron microscopy were used to accurately track the accumulation of 200 nm label-free polystyrene microplastics (PS) in wheat seedlings. The PS accumulated along the root xylem cell wall and in the xylem vessel member and then moved toward to the shoots. In addition, lower concentration (≤ 5 mg·L<sup>-1</sup>) of microplastics increased root hydraulic conductivity by 80.6 %- 117.0 %. While higher PS treatment (200 mg·L<sup>-1</sup>) considerably decreased plant pigments content (chlorophyll a, b, and total chlorophyll) by 14.8 %, 19.9 %, and 17.2 %, respectively, and decreased root hydraulic conductivity by 50.7 %. Similarly, catalase activity was reduced by 17.7 % in root and 36.8 % in shoot. However, extracts from the PS solution showed no physiological effect on wheat. The result confirmed that it was the plastic particle, rather than the chemical reagents added in the microplastics, contributed to the physiological variation. These data will benefit to better understanding on the behavior of microplastics in soil plants, and to providing of convincing evidence for the effects of terrestrial microplastics.

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