Molecular toxicity of earthworms induced by cadmium contaminated soil and biomarkers screening  

作　　者：Xiaohui Mo Yuhui Qiao Zhenjun Sun Xiaofei Sun Yang Li 

机构地区：[1]Department of Ecology Science and Engineering,China Agricultural University,Beijing 100193,China [2]State Key Laboratory for Agrobiotechnology,China Agricultural University,Beijing 100193,China

出　　处：《Journal of Environmental Sciences》2012年第8期1504-1510,共7页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 31070454);the National Key Technology R&D Program in the 11th Five-Year Planof China (No. 2008BADA7B04);the Key Beijing Discipline of Ecology (No. XK10019440)

摘　　要：Earthworms （Eiseniafetida） were used to study the impact of low-dose cadmium in treated artificial soil （0, 0.6, 3, 6, 15, 30 mg/kg） and contaminated natural soil （1.46 mg/kg）. The changes of earthworms＇ physiological related gene expressions of metallothionein （MT）, armetocin, calreticulin and antimicrobial peptides were detected using real-time PCR after a 70-day incubation period. The results showed that low doses of cadmium could up regulate earthworms＇ MT and down regulate annetocin gene expression and show a significant positive and negative correlation respectively. The expression of two other genes, calreticulin and anti-microbial peptides, was induced at low doses of cadmium （highest gene expression at 0.6 mg/kg for calreticulin and 6 mg/kg for anti-microbial peptides） and inhibited at high doses. No significant correlation was found for these two genes. This study shows that MT and annetocin genes expression found in earthworms in contaminated soil have the potential to be developed as biomarkers of soil cadmium pollution.Earthworms （Eiseniafetida） were used to study the impact of low-dose cadmium in treated artificial soil （0, 0.6, 3, 6, 15, 30 mg/kg） and contaminated natural soil （1.46 mg/kg）. The changes of earthworms＇ physiological related gene expressions of metallothionein （MT）, armetocin, calreticulin and antimicrobial peptides were detected using real-time PCR after a 70-day incubation period. The results showed that low doses of cadmium could up regulate earthworms＇ MT and down regulate annetocin gene expression and show a significant positive and negative correlation respectively. The expression of two other genes, calreticulin and anti-microbial peptides, was induced at low doses of cadmium （highest gene expression at 0.6 mg/kg for calreticulin and 6 mg/kg for anti-microbial peptides） and inhibited at high doses. No significant correlation was found for these two genes. This study shows that MT and annetocin genes expression found in earthworms in contaminated soil have the potential to be developed as biomarkers of soil cadmium pollution.

关 键 词：EARTHWORM CADMIUM LOW-DOSE genes expression molecular toxicity 

分 类 号：S899.8[农业科学—特种经济动物饲养] X171.5[农业科学—畜牧兽医]