Department of Civil and Environmental Engineering, Southern Illinois University Carbondale, Carbondale, IL 62901, USA.
Metallomics. 2012 Oct;4(10):1105-12. doi: 10.1039/c2mt20149f. Epub 2012 Sep 17.
Sustainable development of nanotechnology requires an understanding of the long term ecotoxicological impact of engineered nanomaterials on the environment. Cerium oxide nanoparticles (CeO₂-NPs) have great potential to accumulate and adversely affect the environment owing to their widespread applications in commercial products. This study documented the chronic phenotypic response of tomato plants to CeO₂-NPs (0.1-10 mg L⁻¹) and determined the effect of CeO₂-NPs on tomato yield. The results indicated that CeO₂-NPs at the concentrations applied in this study had either an inconsequential or a slightly positive effect on plant growth and tomato production. However, elevated cerium content was detected in plant tissues exposed to CeO₂-NPs, suggesting that CeO₂-NPs were taken up by tomato roots and translocated to shoots and edible tissues. In particular, substantially higher Ce concentrations were detected in the fruits exposed to 10 mg L⁻¹ CeO₂-NPs, compared with controls. This study sheds light on the long term impact of CeO₂-NPs on plant health and its implications for our food safety and security.
可持续发展的纳米技术需要了解工程纳米材料对环境的长期生态毒理学影响。由于氧化铈纳米颗粒（CeO₂-NPs）在商业产品中的广泛应用，它们具有很大的积累潜力，并会对环境造成不利影响。本研究记录了番茄植物对 CeO₂-NPs（0.1-10 mg L⁻¹）的慢性表型反应，并确定了 CeO₂-NPs 对番茄产量的影响。结果表明，在本研究中应用的浓度下，CeO₂-NPs 对植物生长和番茄生产要么没有影响，要么有轻微的积极影响。然而，在暴露于 CeO₂-NPs 的植物组织中检测到铈含量升高，表明 CeO₂-NPs 被番茄根系吸收，并转移到地上部分和可食用组织中。特别是，在暴露于 10 mg L⁻¹ CeO₂-NPs 的果实中，检测到的铈浓度明显高于对照。本研究揭示了 CeO₂-NPs 对植物健康的长期影响及其对我们的食品安全和保障的影响。
