摘要
研究了稀土铽(Tb)对辣根生理毒性的影响。结果表明,Tb在低浓度范围内,可以诱导叶绿素的合成,高浓度时对其产生破坏作用;对于辣根过氧化物酶,酶活性先升后降;质膜透性、丙二醛含量则呈现先减后增的变化趋势。TbCl3浓度为3mg/kg时各指标达到最值;辣根中毒阈限为10mg/kg左右。通过分析,辣根过氧化物酶对Tb反应敏感,这表明过氧化物酶可能成为研究稀土毒理的生物监测手段。
Toxicity effects of terbium on horseradish growth were studied.The results show that the chlorophyll can be induced at the low concentration of Tb3＋,and destroyed as the increasing of Tb3＋ concentration.Tb3＋can induce rise of the activity of horseradish peroxidase（HRP）at lower concentration,and decrease at high concentration.However,the permeability and MDA content appear first decrease and then increase trend.When the concentration is 3mg/kg,all the indexes reach the maximum or minimum;for horseradish,the threshold limit is about 10mg/kg.By the analysis of significance of the index difference,HRP is most sensitive to Tb3＋,indicating that the peroxidase may be regarded as the good index of the heavy rare earth toxicity.
出处
《中国生态农业学报》
CAS
CSCD
2007年第6期117-119,共3页
Chinese Journal of Eco-Agriculture
基金
国家自然科学基金(30570323)
国家发改委稀土国际合作项目(IFZ051210)资助
关键词
铽
辣根
毒性
Study on toxicity effects of terbium on horseradish Terbium,Horseradish,Toxicity
