摘要
Ｃｄ、Ｐｂ胁迫对烟草叶片活性氧清除系统的影响表明：随着Ｃｄ、Ｐｂ处理浓度的增大，叶绿素含量、叶绿素ａ／ｂ值，ＣＡＴ（过氧化氢酶）活性逐渐减小；ＳＯＤ（超氧化物歧化酶）活性先升后转而下降；ＰＯＤ（过氧化物酶）活性则逐渐增加。对烟草活性氧清除系统的影响，Ｃｄ、Ｐｂ之间存在明显的协合作用。Ｃｄ、Ｐｂ胁迫明显地影响活性氧清除系统，导致烟草叶片活性氧代谢失调和加速叶片的老化。
The effect of Cd,Pb stress on scarenging system of activated oxygen indicated that content of chlorophyll,chlorophyll a/b ratio and activity of CAT gradually decrease,the activity of SOD increase first and decrease afterwards,the activity of POD gradually increase with the consistency of Cd,Pb treatment.Between Cd and Pb,there is a synergistical action on effect of scarenging system of activated oxygen.The results indicated that Cd,Pb stress affect scarenging system of activated oxygen and result in imbalance of activated oxygen metabolism
出处
《生态学报》
CAS
CSCD
北大核心
1997年第5期488-492,共5页
Acta Ecologica Sinica
基金
贵州省自然科学基金
关键词
烟草
活性氧清除系统
镉胁迫
铅胁迫
Cd,Pb stress,scarenging system of activated oxygen,tobacco.
