在玉米 (Zea mays L.) 叶子中金属氧化物纳米颗粒的叶子吸收和分布
1MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
Environmental science & technology
|September 11, 2024
概括
玉米植物通过叶子吸收金属氧化物纳米粒子 (NP),而ZnO的吸收率高于其他NP. 非口腔通路对于NP进入植物和潜在的食物链至关重要.
科学领域:
- 环境科学 环境科学
- 植物科学 植物科学
- 纳米技术 纳米技术
背景情况:
- 金属氧化物纳米粒子 (NP) 越来越多地用于农业.
- 了解玉米 (Zea mays L.) 等作物中NP的叶子吸收机制对于评估环境和食品安全至关重要.
研究的目的:
- 为了研究玉米叶的铁氧化物 (Fe3O4),氧化物 (Cr2O3),铜氧化物 (CuO) 和氧化物 (ZnO) 纳米颗粒的叶子吸收.
- 探索口腔和非口腔通路在NP叶片吸收中的作用.
- 确定影响植物组织内NP保留和转移的因素.
主要方法:
- 实验室规模的实验使玉米叶暴露在各种金属氧化物NP中.
- 使用元素分析量化叶子中的NP度.
- 微观分析 (暗场高光谱显微镜) 来观察NP局部化.
- 评估NP大小,表面特性和溶解度对吸收的影响.
主要成果:
- 在暴露于Fe3O4NP的玉米叶中积累了大量的铁 (Fe),这表明非口腔吸收.
- 与Cr2O3,CuO和ZnONP (0.5-14.0%) 相比,Fe3O4NP的保留百分比更高 (21.0-69.0%).
- 与其他NP相比,ZnONP在叶子组织中表现出更大的转位,这归因于更高的溶解度和水友性.
- 在Cr2O3,Fe3O4和CuONP中,皮层透率有限.
结论:
- 非口腔吸收是玉米中金属氧化物NP叶子吸收的重要途径.
- 像大小,表面疏水性和电荷等NP属性影响叶片吸收效率.
- ZnO的独特行为表明了特定的相互作用和在植物组织中更广泛分布的潜力.
- 金属氧化物NP的叶子吸收可能是它们进入食物链的关键途径.
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