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壬基酚对波纹巴非蛤(Paphiaundulata)外套膜毒性效应研究

DOI: 10.13634/j.cnki.mes20150213, PP. 234-239

Keywords: 壬基酚,波纹巴非蛤,外套膜,96,h半致死浓度,抗氧化防御系统

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Abstract:

实验室条件下获得了壬基酚(Nonylphenol,NP)对波纹巴非蛤(Paphiaundulata)的96hLC50值为0.26mg/L。同时研究了波纹巴非蛤外套膜中超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性、谷胱甘肽(GSH)含量和丙二醛(MDA)含量在低、中、高(浓度分别为1、10和25μg/L)3个浓度NP曝毒以及清水释放下的胁迫响应。结果表明:胁迫1d时波纹巴非蛤外套膜SOD活性只有低浓度组被轻度抑制,随后总体呈先诱导后抑制的变化趋势;POD活性在整个胁迫期间只有15d的低、中浓度组被抑制,其他时间总体呈被诱导状态;GSH含量在胁迫1d和7d基本上均低于对照组,而15d时3个浓度组GSH含量均极显著高于对照组(P<0.01);MDA含量随胁迫时间延长呈明显升高的变化趋势。清水释放后,低浓度组SOD活性、POD活性和GSH含量均恢复正常;中、高浓度组只有GSH含量恢复至对照水平。本研究表明NP对波纹巴非蛤外套膜有明显的氧化损伤,且随着NP浓度升高其受损程度增大,高浓度NP胁迫后外套膜SOD活性、POD活性和MDA含量释放实验结束后未能恢复至对照水平。

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