PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS
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2025
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IF 3.3
Zhuang Haoran,Chu Yiwen,Wang Menglin,Liu Bo,Chen Bihua,Lin Ziyu,Li Zhenxia
The mechanisms underlying phytohormonal disruptions caused by microplastic/plasticizer contamination in agricultural systems remain poorly understood. This study systematically investigates how polyethylene (PE), polystyrene (PS), polyvinyl chloride (PVC), and di- n -octyl phthalate (DOP) alter endogenous hormone networks in agricultural systems. Integrated transcriptomic-metabolomic analyses were conducted on cucumber plants grown in hydroponic and soil systems exposed to microplastics (PE, PS, PVC) and DOP. Hormonal pathways were deciphered via gene expression profiling of key biosynthesis regulators. Microplastics and DOP primarily affected the tryptophan-dependent auxin biosynthesis pathway. Differentially expressed genes (DEGs) related to cytokinin biosynthesis were involved in the de novo synthesis pathway. All treatments primarily regulated the expression of DEGs encoding the enzymes gibberellin-20-oxidase (GA20ox), gibberellin-2-oxidase (GA2ox), and gibberellin-3-oxidase (GA3ox) to maintain the balance of active gibberellins. Changes in abscisic acid metabolite levels were linked to the expression of DEGs for abscisic aldehyde oxidase (ABA2). All treatments reduced the ethylene biosynthesis rate. Cucumber plants regulate the expression of DEGs related to phytochrome B (PHYB)-activated inhibitor 1 (CYP734A1) to maintain a balance of endogenous brassinosteroids. Jasmonic acid levels significantly increased after PE, PS, and PS + DOP treatments. Salicylic acid pathways remained unaffected despite phenylalanine ammonia lyase gene variations. PE and PS exhibit significantly stronger impacts on endogenous hormone biosynthesis in cucumber plants compared with PVC. PS with the co-presence of DOP synergistically enhancing jasmonic acid biosynthesis. Notably, smaller PS particle sizes facilitate their absorption by cucumber roots while simultaneously suppressing auxin synthesis efficiency.
研究领域:
植物科学
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环境毒理学
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生物信息学
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农业化学
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2024
·
IF 15.8
Yunxia Ji,Libang Chen,Yunqing Wang,Jinjin Zhang,Yue Yu,Meirong Wang,Xiaoyan Wang,Weili Liu,Bing Yan,Liang Xiao,Xiaodong Song,Changjun Lv,Lingxin Chen
The smaller size fraction of plastics may be more substantially existing and detrimental than larger-sized particles. However, reports on nanoplastics (NPs), especially their airborne occurrences and potential health hazards to the respiratory system, are scarce. Previous studies limit the understanding of their real respiratory effects, since sphere-type polystyrene (PS) nanoparticles differ from NPs occurring in nature with respect to their physicochemical properties. Here, we employ a mechanical breakdown method, producing NPs directly from bulk plastic, preserving NP properties in nature. We report that among four relatively high abundance NP materials PS, polyethylene terephthalate (PET), polyvinyl chloride (PVC), and polyethylene (PE) with a size of 100 nm, PVC induced slightly more severe lung toxicity profiles compared to the other plastics. The lung cytotoxicity of NPs is higher than that of commercial PS NPs and comparable to natural particles silicon dioxide (SiO2) and anatase titanium dioxide (TiO2). Mechanistically, BH3-interacting domain death agonist (Bid) transactivation-mediated mitochondrial dysfunction and nuclear receptor coactivator 4 (NCOA4)-mediated ferritinophagy or ferroptosis are likely common mechanisms of NPs regardless of their chemical composition. This study provides relatively comprehensive data for evaluating the risk of atmospheric NPs to lung health.
研究领域:
环境科学
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毒理学
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材料科学
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呼吸医学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2022
·Vol. 28
·期 4
·719-725
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IF 2.297
Deling Li,Congcong Luo,Bing Yao,Yue Ding,Jizhen Ren
Lanthanum complex with curcumin (La L 2 )/Ca-Zn composite stabilizer was prepared using La L 2 and Ca-Zn stabilizer, in which Ca-Zn stabilizer was obtained from calcium stearate and zinc stearate at their mass ratio of 5:1. The rheological properties and dynamic thermal stability of polyvinyl chloride (PVC) stabilized by La L 2 /Ca-Zn composite stabilizers were estimated through a torque rheometer. The degraded fragments obtained from the torque experiments were measured by Fourier-transform infrared spectroscopy (FTIR) and ultraviolet–visible (UV-vis) spectroscopy. La L 2 had an effective synergistic effect with Ca-Zn stabilizer. Compared with La L 2 , La L 2 /Ca-Zn composite stabilizer could more significantly improve the rheological properties and dynamic thermal stability of PVC. An optimal synergistic effect could be observed when the mass ratio of La L 2 with Ca-Zn stabilizer was about 8:2, in which the plasticizing torque and equilibrium torque of PVC was 33.3 N m and 22.5 N m, respectively, and its dynamic thermal stabilizing time was 25.1 min. The possible thermal stability mechanism of La L 2 /Ca-Zn composite stabilizer for PVC was suggested based on the evaluation of FTIR spectroscopy and UV-vis spectroscopy.
研究领域:
材料科学
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高分子科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Wenrui He,Sui’an Wan,Meng Xu,Wei Wei,Dongfang Wang,Chuan Yi,Yufeng Zhao
The extensive use of microplastics (MPs) and antibiotics has not only exacerbated environmental pollution, but the composite pollutants formed by them also pose escalating ecological risks. This study investigated the impact of aging time on the biodegradable polylactic acid (PLA) and non-degradable polyvinyl chloride (PVC), as well as the adsorption/desorption behavior of norfloxacin (NOR), ciprofloxacin (CIP), and sulfamethoxazole (SMZ) onto these MPs. The effects of ultraviolet (UV) aging (30, 60, and 90 days) on MPs’ physicochemical properties and adsorption performance were systematically evaluated. The results showed that UV aging altered MPs’ surface morphology, crystallinity, and surface charge, enhancing their adsorption capacity. Adsorption kinetics followed the pseudo-second-order model, while isotherms aligned with the Freundlich model, indicating multilayer adsorption governed by physical and chemical interactions (e.g., hydrogen bonding, electrostatic, hydrophobic, and π-π interactions). The adsorption capacities followed the order NOR > CIP > SMZ, with aged PLA exhibiting superior performance (PLA-90d > PLA-60d > PLA-30d > pristine PLA > PVC-90d > PVC-60d > PVC-30d > pristine PVC). PLA exhibited a higher adsorption capacity for antibiotics than PVC, indicating that biodegradable MPs have a stronger ability to adsorb organic pollutants. Desorption experiments were conducted in different pH and waters. The results revealed that PLA-90d and PVC-90d exhibited the highest NOR release rates (30.43 % and 24.64 %, respectively) at pH 11, with seawater promoting greater desorption than lake or ultrapure water due to ionic competition. These findings highlight the critical role of aging in amplifying MPs’ environmental risks as carriers of antibiotics.
研究领域:
环境科学
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污染生态学
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高分子材料科学
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水污染与治理
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环境化学
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吸附技术
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材料老化
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海洋污染
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生态毒理学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）