title: Fate and Phytotoxicity of CeO2 Nanoparticles on Lettuce Cultured in the Potting Soil Environment.
abstract: Cerium oxide nanoparticles (CeO2 NPs) have been shown to have significant interactions in plants. Previous study reported the specific-species phytotoxicity of CeO2 NPs by lettuce (Lactuca sativa), but their physiological impacts and vivo biotransformation are not yet well understood, especially in relative realistic environment. Butterhead lettuce were germinated and grown in potting soil for 30 days cultivation with treatments of 0, 50, 100, 1000 mg CeO2 NPs per kg soil. Results showed that lettuce in 100 mg·kg-1 treated groups grew significantly faster than others, but significantly increased nitrate content. The lower concentrations treatment had no impact on plant growth, compared with the control. However, the higher concentration treatment significantly deterred plant growth and biomass production. The stress response of lettuce plants, such as Superoxide dismutase (SOD), Peroxidase (POD), Malondialdehyde(MDA) activity was disrupted by 1000 mg·kg-1 CeO2 NPs treatment. In addition, the presence of Ce (III) in the roots of butterhead lettuce explained the reason of CeO2 NPs phytotoxicity. These findings demonstrate CeO2 NPs modification of nutritional quality, antioxidant defense system, the possible transfer into the food chain and biotransformation in vivo.
authors: College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100093, China.
authors: Xin
authors: X
authors: Gui
authors: Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
authors: Zhiyong
authors: Z
authors: Zhang
authors: College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100093, China.
authors: Shutong
authors: S
authors: Liu
authors: Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
authors: Yuhui
authors: Y
authors: Ma
authors: Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
authors: Peng
authors: P
authors: Zhang
authors: Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
authors: Xiao
authors: X
authors: He
authors: Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
authors: Yuanyuan
authors: Y
authors: Li
authors: Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
authors: Jing
authors: J
authors: Zhang
authors: College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100093, China.
authors: Huafen
authors: H
authors: Li
authors: College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100093, China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, Massachusetts, 01003, United States of America.
authors: Yukui
authors: Y
authors: Rui
authors: College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100093, China.
authors: Liming
authors: L
authors: Liu
authors: Institute of Agricultural Resource and Regional Planning, Chinese Academy of Agricultural Science, Beijing, 100081, China.
authors: Weidong
authors: W
authors: Cao
mesh_terms: D002563:Cerium / Q000493:pharmacokinetics / Q000633:toxicity*; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D018545:Lactuca / Q000737:chemistry / Q000187:drug effects* / Q000254:growth & development; D053768:Metal Nanoparticles / Q000737:chemistry / Q000633:toxicity; D018384:Oxidative Stress / Q000187:drug effects; D018517:Plant Roots / Q000737:chemistry / Q000187:drug effects / Q000254:growth & development; D018520:Plant Shoots / Q000737:chemistry / Q000187:drug effects / Q000254:growth & development; D012987:Soil / Q000737:chemistry*
chemical_list: D012987:Soil; D002563:Cerium; C030583:ceric oxide