在有机土壤中生长的芫荽（Coriandrum sativum L.）植物中氧化铈纳米颗粒的毒性评估。
Toxicity assessment of cerium oxide nanoparticles in cilantro (Coriandrum sativum L.) plants grown in organic soil.
机构信息
Department of Chemistry, The University of Texas at El Paso, 500 W. University Avenue, El Paso, Texas 79968, USA.
出版信息
J Agric Food Chem. 2013 Jul 3;61(26):6224-30. doi: 10.1021/jf401628v. Epub 2013 Jun 25.
Studies have shown that CeO₂ nanoparticles (NPs) can be accumulated in plants without modification, which could pose a threat for human health. In this research, cilantro (Coriandrum sativum L.) plants were germinated and grown for 30 days in soil amended with 0 to 500 mg kg⁻¹ CeO₂ NPs and analyzed by spectroscopic techniques and biochemical assays. At 125 mg kg⁻¹, plants produced longer roots (p ≤ 0.05), and at 500 mg kg⁻¹, there was higher Ce accumulation in tissues (p ≤ 0.05). At 125 mg, catalase activity significantly increased in shoots and ascorbate peroxidase in roots (p ≤ 0.05). The FTIR analyses revealed that at 125 mg kg⁻¹ the CeO₂ NPs changed the chemical environment of carbohydrates in cilantro shoots, for which changes in the area of the stretching frequencies were observed. This suggests that the CeO₂ NPs could change the nutritional properties of cilantro.
研究表明，CeO₂ 纳米颗粒（NPs）未经修饰即可在植物中积累，这可能对人类健康构成威胁。在这项研究中，用 0 至 500mg/kg 的 CeO₂ NPs 处理土壤，然后让芫荽（Coriandrum sativum L.）种子发芽并生长 30 天，并用光谱技术和生化分析进行分析。在 125mg/kg 时，植物的根更长（p≤0.05），而在 500mg/kg 时，组织中 Ce 的积累更高（p≤0.05）。在 125mg/kg 时， shoots 中的过氧化氢酶活性和 roots 中的抗坏血酸过氧化物酶活性显著增加（p≤0.05）。FTIR 分析表明，在 125mg/kg 时，CeO₂ NPs 改变了芫荽 shoot 中碳水化合物的化学环境，观察到伸展频率面积的变化。这表明 CeO₂ NPs 可能会改变芫荽的营养特性。
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