叶子应用的促进了从叶面到米粒中的的分配
Ya-Ting Liu1, Bo-Fang Yan2, Xuan Cai1
1School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China.
Journal of environmental sciences (China)
|October 31, 2024
概括
较高的叶子 (Zn) 应用增加了 (Cd) 的吸收和米中的谷物积累,这与预期相反. 这一发现表明,在有大气Cd沉积的地区使用叶子Zn时要谨慎.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 植物生理学 植物生理学
背景情况:
- 在大米中积累的 (Cd) 对健康构成重大风险.
- 已知叶子 (Zn) 应用可降低来自受污染土壤的米粒中的Cd.
- 叶子Zn对来自大气沉积的Cd污染的影响尚不清楚.
研究的目的:
- 为了研究不同度的如何影响米中叶子应用的Cd的分配.
- 用稳定的同位素追踪Cd在叶上的运动.
主要方法:
- 用含有不同度Zn和恒定的Cd度的溶液处理旗叶.
- 稳定同位素Cd被用来追踪叶子应用的Cd的流量.
- 进行了关键载体 (OsLCT1,OsZIP7,OsHMA2) 的基因表达分析.
主要成果:
- 较高的叶子Zn水平增强了Cd从叶子流出,并增加了其分配到谷物.
- 这种效应与叶子同质体中Cd封存的减少以及在高Zn2+下细胞壁脱吸的增加有关.
- 非氧化纳米颗粒减轻了这些不良影响.
- OsLCT1,OsZIP7和OsHMA2的上调表明,这有助于Cd体载荷和谷物运输.
结论:
- 当大气沉积是来源时,叶子Zn应用可能无意中增加谷物Cd污染.
- 在可能暴露于大气中的Cd的环境中,Zn应用策略需要仔细考虑.
- 非氧化纳米颗粒可能为叶状应用提供更安全的替代方案.
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