| 摘要: |
| 研究了苯并(a)芘(B[a]P)、苯并(k)荧蒽 (B[k]F)以及两者的混合物对栉孔扇贝(Chlamys farreri)鳃丝和消化盲囊芳烃羟化酶(AHH)活力的影响。结果表明,多环芳烃化合物(PAHs)对栉孔扇贝鳃丝和消化盲囊AHH活力具有显著的诱 导作用(P<0.05),并且呈现了明显的时间、剂量效应特征。B[a]P和B[k]F混合物处理组鳃丝和消化盲囊的AHH活力在实验期间呈现先升 高后稳定趋势,B[a]P处理组则表现峰值变化,然后呈下降趋势。消化盲囊各处理组AHH活力显著高于鳃丝。作者认为可以采用消化盲囊的AHH活力来反映 周围环境PAHs的污染,并应以最大饱和浓度为标准。3种PAHs中B[a]P的毒性最强,PAHs对栉孔扇贝的毒性大小与PAHs的组成有关,不能以不 同种类单一PAHs毒性的总和来代表PAHs混合物的毒性。 |
| 关键词: 多环芳烃化合物 栉孔扇贝 鳃丝 消化盲囊 芳烃羟化酶 |
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| 基金项目:中国海洋大学海水养殖教育部重点实验室开放基金项目;青岛市科技发展计划项目(06-2-2-21-jch) |
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| Effects of polycyclic aromatic hydrocarbons on aryl hydrocarbon hydroxylase activities of marine scallop Chlamys farreri |
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| Abstract: |
| The effects of B[a]P, B[k]F and their mixture on AHH activerties of gills and digestive gland of scallop Chlamys farreri were studied. The results indicated that the AHH activerties of gills and digestive gland of scallop C. farreri were siginificantly induced(P<0.05) by PAHs. And there were a good time-relationship and a dose-relationship between the acticities of AHH and polycyclic aromatic hydrocarbons. The AHH activities of B[k]F and the mixture group at first changed to high and then became stable. And the AHH activities of B[a]P group changed to a peak and then fell. The AHH activities of digestive gland were higher than that of gills’. Therefore AHH activeties can be used as a biomarker to reflect the pollution of PAHs based on the biggest saturation concentration.Furthermore B[a]P has the greatest toxicity in 3 PAHs. The toxicity of PAHs is related to the composition it contains, the summation of single PAHs toxicity is not equal to the toxicity of total PAHs for scallops, this is mainly related to the mechanism of toxicity for scallop C. farreri of PAHs. |
| Key words: PAHs Chlamys farreri gills digestive gland AHH |
