Effects of polyethylene and polylactic acid microplastics on plant growth and bacterial community in the soil

Lian, Yuhang; Liu, Weitao; Shi, Ruiying; Zeb, Aurang; Wang, Qi; Li, Jiantao; Zheng, Zeqi; Tang, Jingchun

doi:10.1016/j.jhazmat.2022.129057

Cited by 155 publications

(19 citation statements)

References 67 publications

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“…5 As an emerging global contaminant, microplastics have various negative consequences on soil ecosystems, including lower soil productivity and biodiversity. 6,7 The use of biodegradable polymers, such as polylactic acid (PLA), has attracted public interest because they can be hydrolyzed and biodegraded to carbon dioxide (CO 2 ) and water, thereby mitigating the dangers associated with traditional petroleumbased microplastics. 8,9 However, biodegradable polymers may not be entirely degraded, which can introduce a new type of microplastic with relatively high bioavailability (compared to conventional microplastics) into soil.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Most microplastics enter soil through the application of sewage sludge/organic fertilizer, , plastic mulching film, and atmospheric deposition . As an emerging global contaminant, microplastics have various negative consequences on soil ecosystems, including lower soil productivity and biodiversity. , The use of biodegradable polymers, such as polylactic acid (PLA), has attracted public interest because they can be hydrolyzed and biodegraded to carbon dioxide (CO 2 ) and water, thereby mitigating the dangers associated with traditional petroleum-based microplastics. , However, biodegradable polymers may not be entirely degraded, which can introduce a new type of microplastic with relatively high bioavailability (compared to conventional microplastics) into soil . While biodegradable polymers have been commercialized and their use is on the rise, the potential effects of biodegradable microplastics on soil ecosystems remain poorly understood.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Microplastics on Soil Carbon Mineralization: The Crucial Role of Oxygen Dynamics and Electron Transfer

Shi,

Wang,

Peng

et al. 2023

Environ. Sci. Technol.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Microplastics on Soil Carbon Mineralization: The Crucial Role of Oxygen Dynamics and Electron Transfer

Shi,

Wang,

Peng

et al. 2023

Environ. Sci. Technol.

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“…MPs also decrease peroxidase (POD) activity and increase catalase (CAT) activity in crop leaves (Lian et al, 2022), and PET MPs inhibit lettuce growth, with chlorophyll being the most sensitive index . In plants, PE MP treatment decreases plant biomass and photosynthetic rate and disrupts normal mineral nutrient metabolism (Fu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…MPs can impair root growth, particularly in seedlings (Colzi et al, 2022). Studies have shown that a 0.1% PA MP treatment significantly reduces root length by 27.53% compared with the control group (without MPs) (Lian et al, 2022). PP MPs, particularly small particle sizes, cause significant reductions in fresh weight, leaf number, and total phosphorus content of pak choi (Yu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Another study showed decreases in biomass and leaf chlorophyll content after addition of 10% PLA MPs (Wang, Zhang, Zhang, Zhang, & Sun, 2020). MPs also decrease peroxidase (POD) activity and increase catalase (CAT) activity in crop leaves (Lian et al, 2022), and PET MPs inhibit lettuce growth, with chlorophyll being the most sensitive index (Zhang, Zhang, et al, 2022). In plants, PE MP treatment decreases plant biomass and photosynthetic rate and disrupts normal mineral nutrient metabolism (Fu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Effects of microplastic pollution on agricultural soil and crops based on a global meta‐analysis

Sun,

Ai,

et al. 2023

Land Degrad Dev

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Agricultural soil serves as a crucial reservoir for microplastics (MPs), necessitating an understanding of their global‐scale environmental impacts and potential risks that they pose to agricultural soil and crops. Little is known about the potential impact of MPs in agricultural soils, compared with MPs in aquatic sediments, especially their effects on crop traits. The purpose of our study was to explore whether different types, concentrations, sizes, and exposure time of MPs, as well as soil conditions (such as soil pH or organic matter concentration), have different effects on soil properties and crop traits. In addition, differences between soil and crop enzymes in response to MPs were compared in detail. Network analysis was used to understand the current research progress on MPs in agricultural soil. Furthermore, utilizing 63 publications and 3268 observations, a meta‐analysis was conducted to analyze the effects of MPs on soil properties and crop traits. Our result showed that China has contributed the most to MP research. Crop traits, rather than soil properties, were more sensitive to MPs, significantly increasing crop biochemical traits (p < 0.05) and decreasing crop morphological traits (p < 0.001). MPs significantly inhibited fruit, shoot, and root morphological traits by 13.34% (p < 0.05), 9.7% (p < 0.001), and 6.65% (p < 0.001), respectively; inhibited crop physiological traits such as photosynthesis, respiration, and transpiration by 9.1% (p < 0.001), 34.44% (p < 0.001), and 14.74% (p < 0.05), respectively; inhibited crop biochemical traits such as organic and inorganic metabolites， and improved enzyme activity by 11.37% (p < 0.001), 10.07% (p < 0.001), and 10.16% (p < 0.001), respectively. MPs decreased soil enzyme activities of leucine aminopeptidases and sucrase by 7.22% (p < 0.01) and 27.26% (p < 0.001), respectively, and increased peroxidase, acid phosphatase, catalase (CAT), and urease activities by 59.21%, 7.34%, 6.86%, and 13.13%, respectively. MPs increased crop enzyme activities of CAT and malondialdehyde by 12.71% and 14.82%, respectively. Conclusively, the effect of MPs on crop traits warrants considerable attention and an urgent need to explore whether MPs cause differences between crops with regard to crop traits.

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Investigation of phytotoxicity and defense responses in pepper exposed to molybdenum disulfide nanoparticles by multi‐omics and phenotypic analyses

Li,

Yan,

Meng

et al. 2023

Land Degrad Dev

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Molybdenum disulfide nanoparticles (MoS2NPs) have attracted considerable attention in the fields of environmental protection and agricultural production. Understanding the potential crop risk (especially in edible parts) incurred by MoS2NPs and the corresponding plant defense against toxicity is a prerequisite for assessing human dietary safety and improving the safe‐by design of such NPs; however, relevant information remains largely unknown. This study examines the toxicity of MoS2NPs to edible vegetable crops of pepper and their corresponding defense mechanisms. Our findings revealed that exposure to MoS2NPs triggered the defense in pepper via reducing transpiration rates in leaves by 36.5%–54.8% and via increasing catalase activity, mineral elements, and gibberellic acid in fruit by 10.7%–32.4%, 0.2%–92.8%, and 28.0%–72.4%, respectively. The defensive response to MoS2NPs stress was also reflected in the elevated amino acid metabolism (e.g., arginine and proline metabolism in leaves, and alanine, aspartate, and glutamate metabolism in fruits), and in the regulation of the oxidation–reduction process proteins in fruits (e.g., increased acyl‐coenzyme A oxidase and cytochrome P450, decreased NADH–ubiquinone oxidoreductase chain and cytokinin dehydrogenase). However, oxidative stress in pepper fruits (e.g., increased H2O2 and malondialdehyde, ultrastructural damage, reduced biomass) was still induced by MoS2NPs, suggesting an unbalance between defense systems and abiotic stress. This study provides valuable insights into the impacts of MoS2NPs on edible parts of crops and helps to assess their ecological risk.

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Effects of polyethylene and polylactic acid microplastics on plant growth and bacterial community in the soil

Cited by 155 publications

References 67 publications

Effects of Microplastics on Soil Carbon Mineralization: The Crucial Role of Oxygen Dynamics and Electron Transfer

Effects of Microplastics on Soil Carbon Mineralization: The Crucial Role of Oxygen Dynamics and Electron Transfer

Effects of microplastic pollution on agricultural soil and crops based on a global meta‐analysis

Investigation of phytotoxicity and defense responses in pepper exposed to molybdenum disulfide nanoparticles by multi‐omics and phenotypic analyses

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