title: Phytotoxicity of CeO2nanoparticles on radish plant (Raphanus sativus).
abstract: Cerium oxide nanoparticles (CeO2NPs) have been considered as one type of emerging contaminants that pose great potential risks to the environment and human health. The effect of CeO2NPs on plant-edible parts and health evaluation remains is necessary and urgently to be developed. In this study, we cultivated radish in Sigma CeO2NP (<25 nm)-amended soils across a series of concentration treatments, i.e., 0 mg/kg as the control and 10, 50, and 100 mg/kg CeO2NPs. The results showed that CeO2NPs accelerated the fresh biomass accumulation of radish plant; especially in the treatment of 50 mg/kg CeO2NPs, root expansion was increased by 2.2 times as much as the control. In addition, the relative chlorophyll content enhanced by 12.5, 12.9, and 12.2% was compared to control on 40 cultivation days. CeO2NPs were mainly absorbed by the root and improved the activity of antioxidant enzyme system to scavenge the damage of free radicals in radish root and leaf. In addition, this study also indicated that the nanoparticles might enter the food chain through the soil into the edible part of the plant, which will be a potential threat to human health.
authors.affiliation: College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100093, People's Republic of China.|College of Forestry, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China.
authors.forename: Xin
authors.initials: X
authors.lastname: Gui
authors.affiliation: College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100093, People's Republic of China.|College of Agriculture, Guangxi University, Nanning, 530005, People's Republic of China.
authors.forename: Mengmeng
authors.initials: M
authors.lastname: Rui
authors.affiliation: School of Agronomy, Anhui Agricultural University, Hefei, 230036, People's Republic of China.
authors.forename: Youhong
authors.initials: Y
authors.lastname: Song
authors.forename: Yuhui
authors.initials: Y
authors.lastname: Ma
authors.affiliation: College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100093, People's Republic of China. ruiyukui@163.com.
authors.forename: Yukui
authors.initials: Y
authors.lastname: Rui
authors.affiliation: Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
authors.forename: Xiao
authors.initials: X
authors.lastname: He
authors.affiliation: Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100093, People's Republic of China.
authors.forename: Liming
authors.initials: L
authors.lastname: Liu
mesh_terms: D002563:Cerium / Q000494:pharmacology; D053768:Metal Nanoparticles / Q000633:toxicity*; D053758:Nanoparticles / Q000633:toxicity; D018517:Plant Roots / Q000187:drug effects; D031224:Raphanus / Q000187:drug effects*
chemical_list: D002563:Cerium; C030583:ceric oxide
keywords: CeO2; Nanoparticles; Radish; Soil