Toxic effects of microplastics in plants depend more by their surface functional groups than just accumulation contents

Xu, Zhimin; Zhang, Yuxue; Li, Lin; Wang, Lei; Sun, Weimin; Yu, Guohui; Yu, Jiadi; Lv, Yao; Chen, Jieting; Chen, Xueqing; Fu, Lingfang; Wang, Yifan

doi:10.1016/j.scitotenv.2022.155097

Cited by 53 publications

(17 citation statements)

References 51 publications

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“…22,23 Under the action of root pressure, nano-PS, nano-PS-COOH, and their complexes with Cr(VI) will enter the apoplastic space of roots through some narrow gaps in the roots of Z. mays. 24 These contaminants pass through the outer cell cortex into the middle column and then transport and accumulate to the parts of Z. mays under the transpiration tension. Nano-PS-COOH is negatively charged, so its biological response is weak, 25,26 which will not cause significant oxidative damage to Z. mays.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Optimization of Electrode Materials Using Nanocarboxylic Polystyrene Promotes Accumulation for Chromium in Zea mays from Water and Soil Contamination

Wu,

Sangaraju

et al. 2024

Langmuir

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Chromium is a multivalent metal with great development in the energy storage field because it can effectively improve the electrochemical performance of the material. However, chromium(VI) is soluble in water and toxic, which causes serious metal pollution in the environment. In addition, nanoplastics are difficult to degrade and easy to accumulate, which is an urgent environmental problem to be solved. Therefore, we choose Zea mays to absorb chromium ions, nanopolystyrene, nanocarboxylic polystyrene, and their complexes, which can coordinate and decompose with various polymers in Z. mays, and produce coordination, conjugation, mixed valence, and adjacent group effects. Due to the above effects, the UV−vis spectrum of the material is blueshifted; the X-ray photoelectron spectroscopy peaks of Cr 2p have a chemical shift; the pore structure is optimized; the graphitization degree is improved; the content of N, O, and Cr in the material increases; and the elements are evenly distributed. The series of optimization processes makes the electrodes exhibit excellent electrochemical performance in both supercapacitors and lithium-ion batteries. At 0.5 A•g −1 , the specific capacitance of the electrode reaches 490 F•g −1 . After 10,000 cycles, its specific capacitance remains at 429.3 F•g −1 , and the Coulombic efficiency is 89.9%. In lithium-ion batteries, the initial discharging capacity of the electrode is 1071.7 mAh•g −1 at 0.05 A•g −1 . After 5000 cycles, its specific capacity can still reach 242 mAh•g −1 at 0.2 A•g −1 , and the Coulombic efficiency is above 95%.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Optimization of Electrode Materials Using Nanocarboxylic Polystyrene Promotes Accumulation for Chromium in Zea mays from Water and Soil Contamination

Wu,

Sangaraju

et al. 2024

Langmuir

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“…However, PS‐COOH NPs that entered the xylem more abundantly produced weaker toxic effects in Arabidopsis than PS‐NH 2 ‐F NPs (positive charge) due to the fact that the PS‐NH 2 ‐F NPs significantly affected the expression of genes related to free radical scavenging (Sun et al, 2020). A previous report also reported that the phytotoxicity of MPs depends more on their surface charge group than on the number of MPs absorbed by the plant (Xu et al, 2022).…”

Section: Influencing Factors Of Np Phytotoxicitymentioning

confidence: 95%

“…Nanoplastics can also indirectly affect plant growth by influencing metabolic and gene expression (Figure 4). Compared with other surface‐modified NPs, NP‐NH 2 significantly reduced mineral elements in roots, organic matter secreted by roots, and organic matter content in roots by affecting metabolic pathways (Xu et al, 2022). Furthermore, Li, Luo, et al (2020) found that PS NPs significantly reduced antioxidant enzyme activity in rice roots due to the down‐regulation of the relative expression of CAT genes.…”

Section: Effects Of Nps On Plant Growthmentioning

confidence: 99%

“…Mineral element metabolism (a), organic acid release in roots (b), organic matter metabolism (c) and KEGG enrichment pathway analysis of DEMs (d, e) after exposure to NPs with different charges. Reproduced with permission from Xu et al (2022). Copyright 2022 Elsevier.…”

Section: Effects Of Nps On Plant Growthmentioning

confidence: 99%

“…Plant root exudation may change the properties of NPs and thus plant uptake and phytotoxicity (Xu et al, 2022). Approximately 30%–40% of the carbon products of plant photosynthesis are released into the inter‐root zone as root exudation (Ding et al, 2018; Nacry et al, 2013).…”

Section: Influencing Factors Of Np Phytotoxicitymentioning

confidence: 99%

See 2 more Smart Citations

Nanoplastic–plant interaction and implications for soil health

Zhou

Wang

Gao

et al. 2022

Soil Use and Management

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Nanoplastics (NPs) are accumulating in the soil environment at a rapid rate, which may cause serious consequences for ecosystems and human health. However, environmental behaviour and toxicity of NPs in the soil-plant system remain poorly understood. This review summarizes current studies on NP-plant interactions to unravel uptake mechanisms and phytotoxicity of NPs. NPs could be taken up by plant roots and transported upwards through the xylem to all organs of the plant, even to the edible parts such as the grain, thereby threatening human health.The interaction of NPs with plants affects plant transport of water and nutrients.Besides, it induces significant oxidative stress leading to inhibition of physiological and biochemical activities such as photosynthesis, and thus adversely affects plant growth and development. In addition, the co-transport of NPs with other soil pollutants may induce the combined toxic effects. This study also discussed the potential mechanism of NP-plant interactions based on previous experience with engineered nanomaterials. Finally, a comprehensive assessment of the key challenges in each area was presented, and future perspectives are offered.

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Microplastics in Plant Species: Impacts and Ecological Perspectives

Umasankar,

Sabumon

2024

Emerging Contaminants and Associated Treatment Technologies

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Toxic effects of microplastics in plants depend more by their surface functional groups than just accumulation contents

Cited by 53 publications

References 51 publications

Optimization of Electrode Materials Using Nanocarboxylic Polystyrene Promotes Accumulation for Chromium in Zea mays from Water and Soil Contamination

Optimization of Electrode Materials Using Nanocarboxylic Polystyrene Promotes Accumulation for Chromium in Zea mays from Water and Soil Contamination

Nanoplastic–plant interaction and implications for soil health

Microplastics in Plant Species: Impacts and Ecological Perspectives

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