摘要
本文研究了 Pb胁迫对多年生黑麦草 ( L olium perenne)、匍匐翦股颖 ( Agrostis stolonifera)幼苗根系内 SOD、CAT、POD三种清除酶活性水平的影响。结果表明 ,在低浓度的 Pb胁迫下植物根系内活性氧清除酶活性水平普遍增加 ,且随胁迫时间延长其水平逐渐上升。而在高浓度时 ,酶活性急剧增加 ,但随胁迫时间的延长 ,酶活性则急剧下降 ,铅毒害效应增加 ,清除酶消除氧自由基的作用逐渐消失 ,其中 ,SOD、CAT酶活性变化较为敏感 ,而 POD相对稳定。匍匐剪股颖对
Physiological and biochemical effects of lead stress on two species of lawns plant root system were tested.The results showed that above certain concentration,Pb 2+ could inhibit the activity of SOD,CAT,POD.At low level concentration,the enzyme activity was going up,but at higher level concentration it was quickly dropping.And the antioxidant defense system of the two phants was injured.Based on the studied results,the effect of creeping bent was greater that of perennial ryegrass.
出处
《重庆环境科学》
北大核心
2003年第10期23-24,52,共3页
Chongqing Environmental Science
基金
贵州大学自然科学基金课题 [贵大基 (1 999) 0 1 4 ]
关键词
铅
毒害作用
活性氧清除酶
多年生黑麦草
匍匐翦股颖
lead
pernicious effects
anti oxidize protecting enzyme
perennial ryegrass
creeping bent
