Peng Kejian, Luo Chunling, You Wuxin, Lian Chunlan, Li Xiangdong, Shen Zhenguo
College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
J Hazard Mater. 2008 Jun 15;154(1-3):674-81. doi: 10.1016/j.jhazmat.2007.10.080. Epub 2007 Oct 30.
In the present study, the accumulation of Mn and other metals by Phytolacca Americana L. from contaminated soils in Hunan Province, South China, was investigated. Results showed that the average concentrations of Mn in the leaves and roots reached 2198 and 80.4 mg kg(-1) (dry weight), respectively, with a maximum 13,400 mg kg(-1) in the leaves. A significant correlation was found between Mn concentrations in the plant leaves and those in the corresponding soils. Hydroponic experiments were also conducted to study the Cd uptake ability and interactions between Mn and Cd in the plant. It was found that P. americana hyperaccumulated not only Mn, but also Cd in the leaves. In the presence of Cd, adding Mn to the solution significantly improved the plant growth and reduced the concentrations of Cd in all organs of the plant.
在本研究中，对中国南方湖南省受污染土壤中美洲商陆对锰及其他金属的积累情况进行了调查。结果表明，叶片和根部锰的平均浓度分别达到2198和80.4毫克/千克（干重），叶片中最高可达13400毫克/千克。发现植物叶片中的锰浓度与相应土壤中的锰浓度之间存在显著相关性。还进行了水培实验，以研究该植物对镉的吸收能力以及锰和镉在植物中的相互作用。结果发现，美洲商陆不仅在叶片中大量积累锰，还积累镉。在有镉存在的情况下，向溶液中添加锰显著促进了植物生长，并降低了植物所有器官中的镉浓度。
