在玉米 (Zea mays L.) 植物中CdS纳米颗粒的转移及其对代谢反应的影响
Hameed Ullah1, Wang Zheng1, Yanqing Sheng2
1CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Chemosphere
|September 16, 2023
概括
硫化纳米颗粒 (CdS NPs) 对玉米生长产生负面影响,抑制了发芽和生物质. 这些NP在植物中积累,破坏新陈代谢,对农业和人类健康构成风险.
科学领域:
- 环境科学 环境科学
- 纳米技术 纳米技术
- 植物生物学 植物生物学
背景情况:
- 硫化纳米颗粒 (CdS NPs) 越来越多地用于商业用途,引发了人们对其环境释放和毒性的担忧.
- 纳米颗粒可以作为损害植物细胞的代理物,影响农业生产率和人类健康.
研究的目的:
- 调查CdS NPs对玉米 (Zea mays L.) 苗的植物毒理学影响.
- 分析暴露于CdS NPs的玉米幼苗的吸收,转位,抗氧化酶活性和代谢特征.
主要方法:
- 玉米幼苗在15天内通过水培方式暴露于各种度的CdSNP (3-100 mg/L) 和离子 (0.3 mg/L).
- 评估了植物毒性,生物量,根形态,NP吸收 (使用TEM和能量分散映射),以及代谢概况 (代谢学).
主要成果:
- CdS NPs显著抑制了种子发芽和根延长,减少了芽和根生物质,改变了根形态.
- CdS NPs被玉米根吸收并转移到芽中,观察到显著的生物积累.
- 代谢学揭示了广泛的代谢干扰,86.30%的分析代谢物在暴露于CdSNP和Cd离子时表现出抑制.
结论:
- CdS NPs具有显著的植物毒性,对玉米的生长和发育构成风险.
- 由CdSNP引起的积累和代谢干扰突出了对农业系统的潜在风险.
- 对于粮食安全和生态系统健康而言,CdS NP的环境释放是一个严重的问题.
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