一个水栽法实验被进行在镉(Cd ) 上调查铜(Cu ) 的效果，钙(Ca ) ，铁(Fe ) ，和锌(Zn ) 由几米饭遗传型的举起。实验在营养液与四米饭遗传型和 Cu 和 Cd 的二个层次作为 2 × 2 × 4 阶乘被执行。植物与控制环境在一个生长房间被种。结果显示出不同米饭遗传型的生物资源之间的重要差别(P <
0.001 ) 。在答案的 Cd 和 Cu 集中没在生物资源上有重要效果。Cu 的增加显著地减少了由米饭的射击和根的 Cd 举起(P <
0.001 ) 。Cd 集中显著地没由植物影响 Ca 举起，而 Cu 集中做了(P = 0.034 ) 。有由射击和根的 Fe 举起上的 Cd 的重要影响(P <
0.001， P = 0.003，分别地) 。Zn 举起作为在射击增加的 Cd 和 Cu 的增加显著地减少了。我们断定 Cu 在 Cd 举起上有重要影响。可能的机制被讨论。
This research includes two investigations. The first one is a market b asket survey of the levels of arsenic(As) and trace elements in bracken fern(Pte ridium aquilinum) originated from three countries: South Korea, China and North Korea. The results showed that the mean As concentrations in stems of samples we re significantly higher than those in leaves. As concentrations in all samples d id not exceed food safety limits for vegetables. Generally, concentrations of Fe , Mn, Cu and Zn in leaves were higher than those in stems. The second investigat ion is a survey on the levels of As and other heavy metals in vegetation in the vicinity of Myoungbong mine tailings. The results demonstrated that As, Pb and C u concentrations and bioaccumulation factors(BCF) in seedlings of the fern(Asple nium achilleifolium) were the highest, whereas Marsh horsetail(Equisetum palustr e) accumulated the highest levels of Zn. Concentrations of As, Pb, Zn and Cu in vegetable-cress(Lepidium sativum) and the edible herb-aromatic madder(Elasholtzi a splendens) were higher than food safety limits. Therefore, a risk assessment o f As and other heavy metals in vegetables and herbs on local human health should be conducted in the future.
LIU Wen-juKim Kyoung-woongZHU Yong-guanLEE Sang-wooCHANG Pei-chunKwak Ji-hyun
A glasshouse pot experiment was conducted to investigate effects of th e arbuscular mycorrhizal fungus Glomus mosseae on the growth of Vicia faba and t oxicity induced by heavy metals (HMs) (Cu, Zn, Pb and Cd) in a field soil contam inated by a mixture of these metals. There was also uninoculation treatment (NM) simultaneously. Mycorrhizal (GM) plants have significantly increased growth and tolerance to toxicity induced by heavy metals compared with NM plants. P uptake was significantly increased in GM plants. Mycorrhizal symbiosis reduced the tra nsportation of HMs from root to shoot by immobilizing HMs in the mycorrhizal, sh own by increasing the ratios of HMs from root to shoot. Oxidative stress, which can induce DNA damage, is an important mechanism of heavy metal toxicity. GM tre atment decreased oxidative stress by intricating antioxidative systems such as p eroxidases and non-enzymic systems including soluble protein. The DNA damage ind uced by heavy metals was detected using comet assay, which showed DNA damage in the plants was decreased by the GM treatment.
ZHANG Xu-hongLIN Ai-junCHEN Bao-dongWANG You-shanSMITH Sally ESMITH F Andrew
