Abstract：
The application of an external magnetic field has been shown to improve the Cd phytoremediation efficiency of F. arundinacea by leaf harvesting. However, the influencing mechanisms of the promoting effect have not yet been revealed. This study evaluated variations in the Cd subcellular allocation and fractions in various F. arundinacea leaves, with or without magnetized water irrigation. Over 50 % of the metal were sequestered within the cell wall in all tissues under all treatments, indicating that cell wall binding was a critical detoxification pathway for Cd. After magnetized water treatment, the metal stored in the cytoplasm of roots raised from 33.1 % to 45.3 %, and the quantity of soluble Cd in plant roots enhanced from 53.4 % to 59.0 %. The findings suggested that magnetized water mobilized Cd in the roots, and thus drove it into the leaves. In addition, the proportion of Cd in the organelles, and the concentration of ethanol-extracted Cd in emerging leaves, decreased by 13.0 % and 47.1 %, respectively, after magnetized water treatment. These results explained why an external field improved the phytoextraction effect of the plant through leaf harvesting.
摘要：
外部磁场的应用已被证明可以通过收获叶片来提高金盏花的Cd植物修复效率。然而,促进作用的影响机制尚未揭示。这项研究评估了各种华润F.arundinacea叶片中Cd亚细胞分配和分数的变化，有或没有磁化水灌溉。在所有处理下，超过50%的金属被隔离在所有组织的细胞壁内，表明细胞壁结合是Cd的关键解毒途径。磁化水处理后，根细胞质中储存的金属从33.1%上升到45.3%，植物根系中可溶性镉的含量从53.4%增加到59.0%。结果表明，磁化水在根中动员了Cd，就这样把它开进了树叶里。此外,细胞器中Cd的比例，和新出现的叶片中乙醇提取的Cd的浓度，下降13.0%和47.1%，分别,经过磁化水处理。这些结果解释了为什么外部田间通过叶片收获改善了植物的植物提取效果。
