Hg,Cd对莼菜冬芽茎、叶叶绿素含量及活性氧清除系统的影响

利用人工配制的生活污水先进行单胞藻（斜生栅落Ｓｃｅｎｅｄｅｓｍｕｓ ｏｂｌｉｑｕｕｓ Ｔｕｒｐ）的培养，再接种田螺（Ｃｉｐａｎｇｏｐａｌｕｄｉｎａ ｓｐ．）和短钝蚤（Ｄａｐｈｎｉａ ｏｂｔｕｓａ Ｋｕｒｚ）对栅藻密度的经时变化，短钝蚤种群增长及水体中氮，磷，碳在培养过程中的变化作了与分析。

Effects of Hg2+, Cd2+ on Chlorophyll Content and Scarenging Systems of Activated Oxygen in Stems and Leaves of Brasenia Schreberi Winter Bud

This paper deals with the impact of Hg²⁺, Cd²⁺ 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 Hg²⁺ and Cd²⁺, 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 Hg²⁺ than to Cd²⁺, its leaves is more sensitive than its stems.