梁杰锋;马徐发;李钰;邹沈娟;赵博礼;侯杰;

• 1:华中农业大学水产学院

摘要(Abstract)：

以紫背浮萍为实验对象,探究双酚A(bsiphenol A, BPA)对其生长、光合色素含量、抗氧化系统和渗透压调节物质的影响。结果表明,不同浓度(0、1、5、20和50 mg·L~(-1))BPA连续暴露7 d后,与对照组相比,随暴露浓度升高,紫背浮萍湿重和叶绿素含量呈现先显著增加后降低的趋势;暴露组过氧化氢(H_2O_2)含量和抗超氧阴离子自由基活性显著降低;丙二醛(MDA)含量在20和50 mg·L~(-1)组显著升高;暴露组抗氧化酶活性包括超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)、谷胱甘肽还原酶(GR)和总抗氧化能力(T-AOC)均低于对照组;谷胱甘肽(GSH)含量在高浓度组显著升高,20 mg·L~(-1)组可溶性糖含量显著升高,可溶性蛋白含量在中高浓度组显著增加。研究表明,中低浓度BPA会提高紫背浮萍光合色素含量,有机物积累增多,促进其生长;但随BPA浓度不断升高,紫背浮萍体内产生氧化损伤,抗氧化酶活性及叶绿素含量降低,生长受到抑制。本研究结果将为BPA污染控制及对水生植物生态毒性效应评价提供理论基础。

关键词(KeyWords)： 双酚A;紫背浮萍;生长;光合色素;抗氧化系统

Abstract:

Keywords:

基金项目(Foundation): 华中农业大学大北农青年学者提升专项资助项目(No.2017DBN016)

作者(Author): 梁杰锋;马徐发;李钰;邹沈娟;赵博礼;侯杰;

Email:

DOI:

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