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首页> 外文期刊>Nanotoxicology >Effect of soluble copper released from copper oxide nanoparticles solubilisation on growth and photosynthetic processes of Lemna gibba L
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Effect of soluble copper released from copper oxide nanoparticles solubilisation on growth and photosynthetic processes of Lemna gibba L

机译：溶解于氧化铜纳米粒子中释放的可溶性铜对Lemna gibba L生长和光合过程的影响

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摘要

Copper oxide nanoparticles (CuO NPs) are used as a biocide in paints, textiles and plastics. Their application may lead to the contamination of aquatic ecosystems, where potential environmental effects remain to be determined. Toxic effects may be related to interactions of NPs with cellular systems or to particles' solubilisation releasing metal ions. In this report, we evaluated CuO NPs and soluble copper effects on photosynthesis of the aquatic macrophyte Lemna gibba L to determine the role of particle solubility in NPs toxicity. When L. gibba plants were exposed 48 h to CuO NPs or soluble copper, inhibition of photosynthetic activity was found, indicated by the inactivation of Photosystem II reaction centers, a decrease in electron transport and an increase of thermal energy dissipation. Toxicity of CuO NPs was mainly driven by copper ions released from particles. However, the bioaccumulation of CuO NPs in plant was shown, indicating the need to evaluate organisms of higher trophic level.
机译：氧化铜纳米颗粒（CuO NPs）在涂料，纺织品和塑料中用作杀菌剂。它们的应用可能导致水生生态系统受到污染，潜在的环境影响尚待确定。毒性作用可能与NP与细胞系统的相互作用或与颗粒的溶解释放金属离子有关。在本报告中，我们评估了CuO NP和可溶性铜对水生植物Lemna gibba L光合作用的影响，以确定颗粒溶解度在NPs毒性中的作用。当L. gibba植物暴露于CuO NPs或可溶性铜48小时后，发现光合活性受到抑制，这由光系统II反应中心的失活，电子传输的减少和热能耗散的增加所表明。 CuO NPs的毒性主要由颗粒释放的铜离子驱动。但是，显示了植物中CuO NP的生物蓄积性，表明需要评估营养水平较高的生物。

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