title: Phytotoxicity and accumulation of copper oxide nanoparticles to the Cu-tolerant plant Elsholtzia splendens.
abstract: The release of nanoparticles (NPs) to the environment poses an increasing potential threat to biological systems. This study investigated the phytotoxicity and accumulation of copper oxide (CuO) NPs to Elsholtzia splendens (a Cu-tolerant plant) under hydroponic conditions. The 50% effective concentration (EC50) of CuO NPs to E. splendens was about 480 mg/L, implying the tolerance of E. splendens to CuO NPs. The Cu content in the shoots treated with 1000 mg/L CuO NPs was much higher than those exposed to the comparable 0.5 mg/L soluble Cu and CuO bulk particles. CuO NPs-like deposits were found in the root cells and leaf cells. Cu K-edge X-ray absorption near-edge structure analysis further revealed that the accumulated Cu species existed predominantly as CuO NPs in the plant tissues. All these results suggested that CuO NPs can be absorbed by the roots and translocated to the shoots in E. splendens.
authors: Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University , Hangzhou , People's Republic of China.
authors: Jiyan
authors: J
authors: Shi
authors: Cheng
authors: C
authors: Peng
authors: Yuanqiang
authors: Y
authors: Yang
authors: Jianjun
authors: J
authors: Yang
authors: Hai
authors: H
authors: Zhang
authors: Xiaofeng
authors: X
authors: Yuan
authors: Yingxu
authors: Y
authors: Chen
authors: Tiandou
authors: T
authors: Hu
mesh_terms: D000222:Adaptation, Physiological; D003300:Copper / Q000032:analysis / Q000737:chemistry / Q000378:metabolism* / Q000633:toxicity*; D019686:Lamiaceae / Q000737:chemistry / Q000187:drug effects* / Q000378:metabolism*; D053768:Metal Nanoparticles / Q000737:chemistry / Q000633:toxicity*; D018517:Plant Roots / Q000737:chemistry / Q000378:metabolism; D018520:Plant Shoots / Q000187:drug effects*
chemical_list: D003300:Copper; C000520:cuprous oxide