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作 者 ：陈宏 彭永康

期 刊 ：西北植物学报 2000年 3期

关键词：小麦；膜脂过氧化；CAT；POD；SOD；伤害机理；镉胁迫；

Keywords:wheat seedlings, Cd 2+, superoxide dismutase, malondialdehyde, peroxidase,

摘 要 ：小麦幼苗经镉胁迫后，随着镉浓度的增高，叶征和根系中的膜脂过氧化产物丙二醛（ＭＤＡ）的含量和过氧物酶（ＰＯＤ）活性明显升高，超氧物歧化酶（ＳＯＤ）活性也有所提高。叶片中ＭＤＡ积累量和ＳＯＤ活性都高于根，而ＰＯＤ活性则是根高于叶片。随幼苗生长时间延长，叶片和根中的ＭＤＡ积累量增加，而ＳＯＤ活性却降低。

Abstract:In this study,the wheat seedlings were treated with Cd 2+ solution,the effects of Cd 2+ on the biological effect of the crop were investigated.The results were summarized as follows,the malondialdehyde (MDA) content kept high level.The activity

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