Hg、Cd及共同作用对烟草叶绿素含量及抗氧化酶系统的影响

 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。

Effects of Hg, Cd and Their Interaction on Chlorophyll Content and Antioxidant Enzyme Systems in Leaves of Tobacco

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.