摘要
本文研究了 Ｈｇ^（２＋）Ｃｄ^（２＋）对水生经济植物莼菜冬芽茎叶叶绿素含量、叶绿素 ａ／ｂ值。可溶性蛋白含量、Ｏ_２含量以及活性氧清除系统活性（ＳＯＤ，ＣＡＴ，ＰＯＤ）的影响实验结果表明：叶绿素含量、叶绿素 ａ／ｂ值、可溶性蛋白含量随着 Ｈｇ^（２＋），Ｃｄ^（２＋）处理浓度的加大呈下降趋势；低浓度Ｈｇ^（２＋）（≤１ｍｍｏｌ．Ｌ^（－１），Ｃｄ^（２＋）（≤５ｍｍｏｌ．Ｌ^（－１）对Ｏ_２’含量、ＳＯＤ活性、ＣＡＴ活性有激应升高，但随着Ｈｇ^（２＋） Ｃｄ^（２＋）处理浓度的加大又呈下降趋势； ＰＯＤ活性随着 Ｈｇ^（２＋） Ｃｄ^（２＋）处理浓度的加大一直呈上升趋势.莼菜冬芽对 Ｈｇ^（２＋）的反应较 Ｃｄ^（２＋）敏感，叶片对
This paper deals with the impact of Hg^(2+), Cd^(2+) on chlorophyll contents and scarenging systems of activated oxygen in stems and leaves of Brasenia schreberi winter bud. The results indicate that, as increasing of the concentration of Hg^(2+) and Cd^(2+) chlorophyll contents, chlorophyll a/b values and soluble protein contents decreased, the activities of SOD and CAT increased first and decreased afterwards and the activity of POD increased from beginning to end. The results also show that Brasenia schreberi winter bud is more sensitive to Hg^(2+) than to Cd^(2+), its leaves is more sensitive than its stems.
出处
《湖泊科学》
EI
CAS
CSCD
1999年第4期322-327,共6页
Journal of Lake Sciences
基金
国家自然科学基金!39770046
关键词
汞离子
镉
莼菜冬芽
叶绿素
活性氧
清除系统
Hg^(2+)
Cd^(2+)
Brasenia schreberi
winter bud
chlorophyll
activated oxygen
