Gui Xin, Rui Mengmeng, Song Youhong, Ma Yuhui, Rui Yukui, Zhang Peng, He Xiao, Li Yuanyuan, Zhang Zhiyong, Liu Liming
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.
Environ Sci Pollut Res Int. 2017 May;24(15):13775-13781. doi: 10.1007/s11356-017-8880-1. Epub 2017 Apr 11.
Cerium oxide nanoparticles (CeO NPs) have been considered as one type of emerging contaminants that pose great potential risks to the environment and human health. The effect of CeO NPs on plant-edible parts and health evaluation remains is necessary and urgently to be developed. In this study, we cultivated radish in Sigma CeO NP (<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 CeO NPs. The results showed that CeO NPs accelerated the fresh biomass accumulation of radish plant; especially in the treatment of 50 mg/kg CeO NPs, 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. CeO NPs 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.
氧化铈纳米颗粒（CeO NPs）被认为是一类对环境和人类健康构成巨大潜在风险的新兴污染物。研究CeO NPs对植物可食用部分的影响并进行健康评估很有必要且亟待开展。在本研究中，我们在添加了不同浓度Sigma CeO NP（<25 nm）的土壤中种植萝卜，设置了一系列浓度处理，即0 mg/kg作为对照，以及10、50和100 mg/kg的CeO NPs。结果表明，CeO NPs促进了萝卜植株的鲜生物量积累；特别是在50 mg/kg CeO NPs处理下，根部膨大比对照增加了2.2倍。此外，在种植40天时，与对照相比，相对叶绿素含量分别提高了12.5%、12.9%和12.2%。CeO NPs主要被根部吸收，并提高了抗氧化酶系统的活性，以清除萝卜根和叶中自由基的损伤。此外，本研究还表明，纳米颗粒可能通过土壤进入植物的可食用部分从而进入食物链，这将对人类健康构成潜在威胁。
