The application of an external magnetic field has been shown to improve the Cd phytoremediation efficiency of 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 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.

中文翻译：

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磁化水灌溉对植物修复过程中羊茅叶片Cd亚细胞分配及化学形态的影响

外部磁场的应用已被证明可以提高通过叶子收获的镉植物修复效率。但其促进作用的影响机制尚未揭示。本研究评估了有或没有磁化水灌溉的不同叶片中镉亚细胞分配和分数的变化。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，表明细胞壁结合是镉的关键解毒途径。磁化水处理后，根部细胞质中金属储量由33.1%提高到45.3%，植物根部可溶性镉含量由53.4%提高到59.0%。研究结果表明，磁化水会动员根部的镉，从而将其驱赶到叶子中。此外，磁化水处理后，细胞器中Cd的比例和新叶中乙醇提取的Cd浓度分别下降了13.0%和47.1%。这些结果解释了为什么外部场地通过叶子收获提高了植物的植物提取效果。