镉污染对鲢抗氧化防御系统影响研究 |
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引用本文: | 吕景才,宋晓阳,王凡,赵元凤,孙静,潘德建,侯美艳,刘恒明. 镉污染对鲢抗氧化防御系统影响研究[J]. 西南大学学报(自然科学版), 2002, 24(6): 491-493,505 |
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作者姓名: | 吕景才 宋晓阳 王凡 赵元凤 孙静 潘德建 侯美艳 刘恒明 |
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作者单位: | 大连大产学院养殖系,辽宁大连116023 |
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基金项目: | 辽宁省科委基金项目资助 (0 0 1 0 55),辽宁省教育厅项目资助 (2 0 1 0 1 2 33) |
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摘 要: | 采用毒性实验方法,研究了不同浓度的镉(Cd^2 )对鲢几种组织内抗氧化防御系统酶-超氧化物歧化酶(SOD)活性的影响。结果表明,在实验剂量范围内,Cd^2 对鲢几种组织内SOD活性均有不同程度诱导,其剂量-效应曲线均为抛物线,即低浓度Cd^2 对SOD超诱导作用,高浓度则起抑制作用。不同组织内SOD对Cd^2 的敏感性不同,按敏感性大小顺序排列为:血清>肝脏=鳃>肌肉;按Cd^2 对不同组织SOD活性最大诱导倍数高低次序排列为:血清>肝脏>鳃>肌肉;表明,灵敏指示Cd^2 对鲢胁迫程度的优选组织是血清,其次是肝脏。
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关 键 词: | 镉污染 鲢 抗氧化防御系统 影响 超氧化物歧化酶 淡水鱼类 |
文章编号: | 1000-2642(2002)06-0491-03 |
THE EFFECTS OF CADMIUM POLLUTION ON THE ANTIOXIDANT DEFENSE SYSTEM OF ARISTCHTHUS NOBILIS |
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Abstract: | A toxic experiment was made to study the effect of different concentration of cadmium (Cd 2+ ) on the activity of the antioxidant defense system, i.e. superoxide dismutase (SOD) in different tissues, of Aristchthys nobilis. The results showed that within the dosages adopted in the experiment, Cd 2+ induced, in different degrees, SOD activity in the tissues of Aristchthys nobilis . The dosage-effect curves were all parabolic, suggesting that low concentration of Cd 2+ induced SOD while high Cd 2+ concentration inhibited it. The sensitivity of SOD to Cd 2+ differed with tissue, being serum > liver = gill >muscle, and the maximal induction multiple sequence of Cd 2+ on SOD appeared to be serum > liver > gill > muscle. Such results showed that the optimum seeking tissue for the indication of Cd 2+ coercion on Aristchthys nobilis should be serum, followed by liver. |
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Keywords: | Aristchthys nobilis superoxide dismutase (SOD) cadmium (Cd 2+ ) |
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