MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China; Hebei Petroleum University of Technology, Heibei, 067000, China.
MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China.
J Environ Manage. 2022 Mar 15;306:114454. doi: 10.1016/j.jenvman.2022.114454. Epub 2022 Jan 7.
Zinc oxide nanoparticles (ZnO NPs) widely used have caught the attention of researchers, nevertheless, phytotoxicity, bioaccumulation, and potential risks thereof to the green leafy still have knowledge defects. A pot experiment was intended to cultivate pakchoi (Brassica chinensis L.) following root exposure to ZnO NPs and Zn. ZnO NPs promoted plant growth and Zn accumulation, formed a dose-dependent effect on chlorophyll and carotenoids, and induced fluctuations in antioxidant enzyme activities and alleviated the oxidative damage of pakchoi. Particularly, 1000 mg kg ZnO NPs resulted in malondialdehyde (MDA) content of pakchoi shoots that was 87% higher than control. TEM was used to observe ZnO NPs of root cells and found that its possible way to enter the plant was endocytosis. Research on the content of several co-existing nutrients showed that 100 mg kg ZnO NPs significantly (p < 0.05) promoted the absorption of Ca, P and Fe by pakchoi shoots. In parallel, the hazard quotient (HQ) was used to assess the potential health risk of ZnO NPs.
氧化锌纳米粒子（ZnO NPs）的广泛应用引起了研究人员的关注，然而，其对绿叶植物的植物毒性、生物累积性和潜在风险仍存在知识缺陷。本研究采用盆栽实验，通过根部暴露于 ZnO NPs 和 Zn 来培养小白菜（Brassica chinensis L.）。结果表明，ZnO NPs 促进了植物的生长和 Zn 的积累，对叶绿素和类胡萝卜素形成了剂量依赖效应，并诱导抗氧化酶活性的波动，从而减轻了小白菜的氧化损伤。特别是，1000mg/kg ZnO NPs 导致小白菜地上部丙二醛（MDA）含量比对照高 87%。TEM 观察到根细胞中的 ZnO NPs，发现其进入植物的可能途径是内吞作用。对几种共存养分含量的研究表明，100mg/kg ZnO NPs 显著（p<0.05）促进了小白菜地上部对 Ca、P 和 Fe 的吸收。同时，采用危害商数（HQ）评估 ZnO NPs 的潜在健康风险。
