Wu L H, Sun X F, Luo Y M, Xing X R, Christie P
Soil and Environment Bioremediation Research Centre, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China.
Int J Phytoremediation. 2007 May-Jun;9(3):227-41. doi: 10.1080/15226510701376091.
Two pot experiments were conducted to investigate the time course effects of the (S, S)-N, N'-ethylenediamine disuccinic acid (EDDS) addition to contaminated soil on the uptake of Cu and Zn by the Cu accumulator Elsholtzia splendens and on plant Cu and Zn concentrations at different growth stages. EDDS increased the amounts of Cu and Zn soluble in the soil, taken up by plants, concentrated in the xylem sap, and translocated from roots to stems and leaves. The increase in soil-soluble metals, especially Cu, resulted in a corresponding increase in metal concentrations in the xylem sap and leaves. The addition of EDDS to the soil increased plant Cu and Zn concentrations, especially in the leaves, and changed the proportions of Cu and Zn taken up by different plant parts. The proportions of Cu and Zn taken up by the roots were higher than by the leaves of control plants, but EDDS-treated plants showed the opposite trend. EDDS exerted greater effects at the end of the vegetative growth stage than at the start of the flowering or reproductive stages.
进行了两项盆栽试验，以研究向污染土壤中添加（S,S）-N,N'-乙二胺二琥珀酸（EDDS）对铜积累植物海州香薷吸收铜和锌以及不同生长阶段植物铜和锌浓度的时间进程影响。EDDS增加了土壤中可溶的、被植物吸收的、集中在木质部汁液中以及从根向茎和叶转运的铜和锌的量。土壤中可溶金属尤其是铜的增加，导致木质部汁液和叶片中金属浓度相应增加。向土壤中添加EDDS提高了植物铜和锌的浓度，尤其是在叶片中，并改变了不同植物部位吸收的铜和锌的比例。对照植物根吸收的铜和锌的比例高于叶，但经EDDS处理的植物呈现相反趋势。EDDS在营养生长阶段末期比在开花或生殖阶段初期发挥的作用更大。
