金属有机骨架 MOF-74(Co) 纳米粒子对豌豆幼苗的植物毒性。
Phytotoxicity of metal-organic framework MOF-74(Co) nanoparticles to pea seedlings.
机构信息
Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, College of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, P. R. China.
Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, College of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, P. R. China.
出版信息
Environ Sci Process Impacts. 2024 Apr 24;26(4):710-720. doi: 10.1039/d3em00503h.
Metal-organic framework (MOF) materials have unique structure and fantastic properties for wide-ranging applications. Pilot studies highlighted the toxicity and potential threats of MOF materials to the environment. In this study, we revealed the phytotoxicity of MOF-74(Co) nanoparticles (NPs) and their inhibitory effects on the photosynthesis of pea seedlings ( L.). MOF-74(Co) NPs have limited influences on the germination of pea seeds, but distinct environmental effects of MOF-74(Co) NPs were found in pea seedlings. The root length of pea seedlings, fresh weight and dry weight decreased by 50.0%, 29.2% and 36.4%, respectively, compared with the control group, when the material concentration was greater than 100 mg L. The net photosynthetic rate decreased by 48% and the intercellular CO concentration increased by 183% upon exposure to MOF-74(Co) NPs. Mechanistically, MOF-74(Co) exposure led to Co uptake in pea seedlings; the increases were 223% for the root, 267% for the stem and 6562% for the leaves, respectively, when the MOF-74(Co) NP concentration was 10 mg L. The released Co ions from MOF-74(Co) NPs caused oxidative damage to leaves and induced damage to the acceptor side of photosynthesis system II. Our results indicated that the environmental toxicity of MOF materials was largely regulated by the metal centers. MOF materials with nontoxic metal elements are desirable for future applications.
金属-有机骨架（MOF）材料具有独特的结构和极好的性能，可广泛应用。初步研究强调了 MOF 材料对环境的毒性和潜在威胁。在这项研究中，我们揭示了 MOF-74（Co）纳米粒子（NPs）的植物毒性及其对豌豆幼苗光合作用的抑制作用。MOF-74（Co）NPs 对豌豆种子的萌发影响有限，但在豌豆幼苗中发现了 MOF-74（Co）NPs 的明显环境效应。与对照组相比，当材料浓度大于 100mg/L 时，豌豆幼苗的根长、鲜重和干重分别下降 50.0%、29.2%和 36.4%。当暴露于 MOF-74（Co）NPs 时，净光合速率下降了 48%，胞间 CO 浓度增加了 183%。从机制上讲，MOF-74（Co）暴露导致 Co 在豌豆幼苗中的吸收；当 MOF-74（Co）NP 浓度为 10mg/L 时，根、茎和叶中的 Co 分别增加了 223%、267%和 6562%。MOF-74（Co）NPs 释放的 Co 离子对叶片造成氧化损伤，并诱导光合作用系统 II 受体侧损伤。我们的结果表明，MOF 材料的环境毒性在很大程度上受到金属中心的调节。对于未来的应用，具有无毒金属元素的 MOF 材料是理想的。
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