牟文;熊丽;胡芹芹;周巧巧;杨雪;张灿;刘德立;

• 1:华中师范大学生命科学学院湖北省遗传调控与整合生物学重点实验室

摘要(Abstract)：

为探讨汞对藻类的毒性效应,以斜生栅藻(Scenedesmus obliquus)为实验材料,检测了HgCl2对藻细胞数目、光合色素含量、超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量等生化指标的影响.结果表明,各暴露组(0.2～1.5mg·L-1)HgCl2对斜生栅藻的生长均有抑制作用,随HgCl2暴露浓度的增大,藻细胞密度逐渐降低,HgCl2对斜生栅藻的48、72、96hEC50值分别为1.194、1.113、0.986mg·L-1.随着HgCl2暴露浓度的升高(0.01～1.5mg·L-1),叶绿素a、b及类胡萝卜素等光合色素含量均呈逐渐降低趋势;SOD活性表现为先激活后抑制;MDA含量则显著增加(p<0.05,p<0.01).

关键词(KeyWords)： 斜生栅藻;HgCl2;超氧化物歧化酶;丙二醛;光合色素

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(No.30771429;No.20672041)

作者(Author): 牟文;熊丽;胡芹芹;周巧巧;杨雪;张灿;刘德立;

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