摘要
本文报道了Ｈｇ、Ｃｄ及二者共同作用明显不同程度地影响烟草叶绿素含量及抗氧化酶系统。受Ｈｇ、Ｃｄ胁迫后，随着土壤中Ｈｇ、Ｃｄ浓度的增加，叶绿素含量、叶绿素ａ／ｂ值、ＣＡＴ活性逐渐减小，ＳＯＤ活性先升后降，ＰＯＤ活性则逐渐增加。同时也表现出单一Ｈｇ、Ｃｄ对烟草叶绿素含量及抗氧化酶系统的影响明显大于Ｈｇ、Ｃｄ二者的共同作用。
The paper deals with Hg,Cd and their interaction on chlorophyll content and antioxidant enzyme systems in leaves of tobacco.The result indicates that,as increasing of the concentration of Hg and/or Cd in soil,content of chlorophyll,chlorophyll a/b values and activity of CAT decreased,the activity of SOD increased first and decreased afterwards and the activity of POD increased.The effects of single Hg and single Cd on chlorophyll content and antioxidant enzymes systems were both more obvious than that of the interaction of Hg and Cd.
出处
《植物生态学报》
CAS
CSCD
北大核心
1997年第5期468-473,共6页
Chinese Journal of Plant Ecology
基金
贵州省自然科学基金
关键词
烟草
叶绿素
抗氧化酶系统
汞胁迫
镉胁迫
Hg stress,Cd stress,Interaction,Tobacco,Chlorophyll content,Antioxidant enzyme systems
