林芳;毛楷林;江秀;周海龙;

• 1:海南大学热带农林学院

摘要(Abstract)：

为了揭示不同浓度苯并芘(BaP)及滴滴涕(DDT)对海洋贝类胚胎的生态毒理效应,将翡翠贻贝(Perna viridis)胚胎分别暴露于不同浓度BaP及DDT中,检测暴露24 h和48 h后,BaP和DDT对翡翠贻贝胚胎抗氧化及非特异性免疫酶活性的影响,包括超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、酸性磷酸酶(ACP)、碱性磷酸酶(AKP),并利用综合生物标志物响应(IBR)指数对苯并芘及DDT对翡翠贻贝胚胎的综合毒理效应进行评价。结果表明,BaP和DDT胁迫显著影响翡翠贻贝胚胎抗氧化酶(SOD、GPx)和非特异性免疫酶(ACP、AKP)的活性。与对照组相比,随着暴露浓度的升高,胚胎SOD、AKP的活性呈现先抑制后诱导的趋势。DDT和BaP对ACP酶活性的影响不同,其中BaP对ACP活性的影响表现为先抑制,后恢复,而DDT对翡翠贻贝胚胎ACP的活性影响不显著。IBR分析表明,在胁迫早期随着污染物浓度的升高,RIB值逐渐增大,随着染毒时间延长,处理组RIB值均减小,总体来说,DDT的RIB值比BaP的RIB值大,表明DDT的胚胎毒性较强。通过探究翡翠贻贝胚胎重要酶应答BaP和DDT胁迫的毒理生化响应,评价持久性有机污染物对海洋贝类的毒理效应,为敏感生物标志物的筛选打下一定的基础,且为海洋环境的污染早期预警监测提供了一种新思路。

关键词(KeyWords)： 苯并芘;滴滴涕;翡翠贻贝;胚胎毒性;酶活性;整合生物标志物响应指数(IBR)

Abstract:

Keywords:

基金项目(Foundation): 海南大学热带农林学院学生学术科技创新支持项目;; 国家自然科学基金(41161077)

作者(Author): 林芳;毛楷林;江秀;周海龙;

Email:

DOI:

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