School of Environmental and Safety Engineering, Changzhou University, Changzhou, 213164, Jiangsu, China.
College of Agriculture, Guizhou University, Guiyang, 550025, China.
Bull Environ Contam Toxicol. 2020 Jun;104(6):770-777. doi: 10.1007/s00128-020-02850-9. Epub 2020 Apr 23.
The increasing utilization of copper oxide nanoparticles (CuO NPs) and their release into the environment has made it imperative to elucidate their impact on the ecological system including plants. However, their potential toxic impact and mechanisms on plant growth are still unclear. The aim of this study was to investigate the effects of CuO NPs and released Cu ions on seed germination and early seedling growth, as well as physiological and biochemical parameters of Oryza sativa. The results showed that CuO NPs at high concentration significantly inhibited seed germination and early seedling growth. The toxicity of CuO NPs originated from the particulate NPs rather than the released Cu. The phytotoxicity of CuO NPs to rice seed germination and seedling growth probably induced by high Cu accumulation along with the lignification and oxidative damage. The work presented here will increase our knowledge of phytotoxicity of CuO NPs.
氧化铜纳米粒子（CuO NPs）的应用日益广泛，其在环境中的释放也越来越多，因此迫切需要阐明它们对包括植物在内的生态系统的影响。然而，它们对植物生长的潜在毒性影响及其机制尚不清楚。本研究旨在探讨 CuO NPs 和释放的 Cu 离子对水稻种子萌发和早期幼苗生长以及生理生化参数的影响。结果表明，高浓度的 CuO NPs 显著抑制了种子的萌发和早期幼苗的生长。CuO NPs 的毒性源于颗粒态的 NPs，而不是释放的 Cu。CuO NPs 对水稻种子萌发和幼苗生长的植物毒性可能是由于 Cu 的积累、木质化和氧化损伤引起的。本研究将增加我们对 CuO NPs 植物毒性的认识。
