Guo Jun-Mei, Yang Jun-Xing, Yang Jun, Chen Tong-Bin, Li Hou-En, Xu Tie-Bing, Zhou Xiao-Yong, Ye Yong, Yu Bao
Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
Beijing Engineering Research Center of Environmental Geotechnology, BGI Engineering Consultants Co., Ltd., Beijing 100038, China.
Huan Jing Ke Xue. 2019 Jan 8;40(1):470-479. doi: 10.13227/j.hjkx.201805055.
A hydroponic experiment was conducted to study the interaction of Cd and Zn affecting the root morphology and accumulation of Cd and Zn in . The results show that exhibits a high tolerance to single stress of Cd and Zn and the concentrations of Cd and Zn in the leaf, stem, and root of increase as the stress levels increase. A strong phytoextraction capacity in was also observed for the Cd concentration in the aboveground part reaching 133.0 mg·kg. The combined stress of Cd and Zn has a greater effect on the growth of than single stress to which the root is more sensitive. The root length, surface area, root volume, and tips significantly decrease under combined stress of Cd and Zn; the effect on the tips is most significant. The low-level Zn application (10 mg·L) has a synergistic effect on the Cd accumulation in the shoot of because of the promotion of Cd translocation from root to shoot. However, the addition of Cd leads to a notable antagonism of the Zn absorption of . The concentration ratio of Zn and Cd also has a significant effect on the Cd uptake of . A high ratio promotes the Cd accumulation in the shoot, while the latter is inhibited by a low Zn/Cd ratio. Therefore, possesses a strong potential of Cd phytoextraction and can be applied for phytoremediation of Cd-contaminated soil, while the adjustment of the ratio of Cd and Zn in the growth medium will help to enhance the phytoremediation efficiency of .
进行了一项水培实验，以研究镉和锌的相互作用对[植物名称未给出]根系形态以及镉和锌积累的影响。结果表明，[植物名称未给出]对镉和锌的单一胁迫具有较高耐受性，并且随着胁迫水平的增加，其叶、茎和根中镉和锌的浓度也会增加。还观察到[植物名称未给出]具有很强的植物提取能力，地上部分的镉浓度达到133.0 mg·kg。镉和锌的复合胁迫对[植物名称未给出]生长的影响大于单一胁迫，根系对复合胁迫更敏感。在镉和锌的复合胁迫下，根长、表面积、根体积和根尖显著减少；对根尖的影响最为显著。低水平锌施用（10 mg·L）由于促进了镉从根向地上部的转运，对[植物名称未给出]地上部镉积累具有协同作用。然而，镉的添加导致[植物名称未给出]对锌吸收的显著拮抗作用。锌和镉的浓度比也对[植物名称未给出]的镉吸收有显著影响。高比例促进地上部镉积累，而低锌/镉比则抑制镉积累。因此，[植物名称未给出]具有很强的镉植物提取潜力，可用于镉污染土壤的植物修复，同时调整生长介质中镉和锌的比例将有助于提高[植物名称未给出]的植物修复效率。
