Effects of Glomus mosseae on the toxicity of heavy metals to Vicia faba  

作　　者：ZHANG Xu-hong LIN Ai-jun CHEN Bao-dong WANG You-shan SMITH Sally E SMITH F Andrew 

机构地区：[1]Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China [2]Department of Environmental Engineering, Beijing University of Chemical Technology, Beijing 100029, China [3]Lab of Soil and Microbe,Department of Plant Nutrition and Resource, Agriculture and Forestry Academy of Beijing, Beijing 100089, China [4]Soil and Land Systems, School of Earth and Environmental Sciences, The University of Adelaide, Adelaide, South Australia, 5005, Australia

出　　处：《Journal of Environmental Sciences》2006年第4期721-726,共6页环境科学学报（英文版）

基　　金：TheMinistryofScienceandTechnology,China(No.2002CB410808)andtheNationalNaturalScienceFoundationofChina(No.40225002)

摘　　要：A glasshouse pot experiment was conducted to investigate effects of the arbuscular mycorrhizal fungus Glomus mosseae on the growth of Vicia faba and toxicity induced by heavy metals （HMs） （Cu, Zn, Pb and Cd） in a field soil contaminated 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 transportation of HMs fi＇om root to shoot by immobilizing HMs in the mycorrhizal, shown 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 treatment decreased oxidative stress by intricating antioxidative systems such as peroxidases and non-enzymic systems including soluble protein. The DNA damage induced by heavy metals was detected using comet assay, which showed DNA damage in the plants was decreased by the GM treatment.A glasshouse pot experiment was conducted to investigate effects of the arbuscular mycorrhizal fungus Glomus mosseae on the growth of Vicia faba and toxicity induced by heavy metals （HMs） （Cu, Zn, Pb and Cd） in a field soil contaminated 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 transportation of HMs fi＇om root to shoot by immobilizing HMs in the mycorrhizal, shown 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 treatment decreased oxidative stress by intricating antioxidative systems such as peroxidases and non-enzymic systems including soluble protein. The DNA damage induced by heavy metals was detected using comet assay, which showed DNA damage in the plants was decreased by the GM treatment.

关 键 词：arbuscular mycorrhizal fungi （AMF） metal contamination metal toxicity DNA damage 

分 类 号：X53[环境科学与工程—环境工程]