成人做爰免费视频免费看_成人a级高清视频在线观看,成人a大片在线观看,成人a大片高清在线观看,成人av在线播放,一a一级片,一级黄 中国色 片,一级黄 色蝶 片,一级黄色 片生活片

作者：Mingjing Ke¹, Youchao Zhu¹, Meng Zhang¹, Hailiqieguli Gumai¹, Zhenyan Zhang¹, Junjie Xu¹, Haifeng Qian^1,2 

    1.College of EnvironmentZhejiang University of TechnologyHangzhouPeople’s Republic of China

    2.Xinjiang Key Laboratory of Environmental Pollution and BioremediationChinese Academy of SciencesUrumqiPeople’s Republic of China

 

摘要：The widespread application of copper oxide nanoparticles (nCuO) results in ecological risk when nanoparticles enter the environment. This study clarifies the mechanism of nCuO toxicity in Arabidopsis thaliana seedlings via comparison with copper (Cu) ion bioeffects. Under the same culture conditions, Cu2+ ion exposure exerted a stronger inhibitory effect on plant fresh weight and growth and caused stronger oxidative disruption (measured by malondialdehyde, MDA) than nCuO exposure. The Cu2+ ions also showed a stronger induction effect than did nCuO on the activity of antioxidant enzymes and the transcription of antioxidant-related genes. Dissolved Cu2+ ions contributed a minority of the toxicity of nCuO, implying that nCuO itself showed relative strong phytotoxicity. The work presented here will help increase our understanding of the toxicity of metal nanoparticles in plants.