| 重金属离子对凡纳滨对虾的致病机理研究 |
| Pathogenetic Mechanism of Heavy Metal Ions on Litopenaeus vannamei |
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| DOI： |
| 中文关键词:重金属离子 凡纳滨对虾 致病机理 |
| 英文关键词:heavy metal ions Litopenaeus vannamei pathogenetic mechanism |
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| 摘要点击次数: 1827 |
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| 中文摘要: |
| 研究了重金属离子Ｃｄ２＋、Ｐｂ２＋、Ｃｒ３＋对凡纳滨对虾血清ＳＯＤ、ＣＡＴ活性的影响。结果表明，低、中等浓度的Ｃｄ２＋、Ｐｂ２＋、Ｃｒ３＋均对凡纳滨对虾血清ＳＯＤ活性表现为较强的诱导作用。在一定的时间和较高浓度下，Ｃｄ２＋、Ｐｂ２＋、Ｃｒ３＋均对凡纳滨对虾血清ＳＯＤ、ＣＡＴ活性表现出显著抑制作用，具有一定的时间、剂量效应关系。在较低的Ｃｄ２＋、Ｐｂ２＋、Ｃｒ３＋浓度下，ＳＯＤ、ＣＡＴ活性明显高于对照，且随着各处理浓度的增加和时间的延长（７２ｈ），Ｃｄ２＋、Ｐｂ２＋、Ｃｒ３＋对血清ＳＯＤ、ＣＡＴ活性表现出更加明显的抑制作用，即在低剂量、短时间内会导致酶活性提高；而在高剂量或长时间作用下，对虾ＳＯＤ、ＣＡＴ活性表现为抑制作用，且表现出２种金属离子对血清ＳＯＤ、ＣＡＴ活性的抑制作用比单一的金属离子抑制作用更加显著，显示出Ｃｄ２＋、Ｐｂ２＋、Ｃｒ３＋复合污染具有明显协同作用。金属离子的胁迫下使ＳＯＤ、ＣＡＴ的活性比例失调，使对虾的生理代谢紊乱，加速对虾的衰老和死亡。
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| 英文摘要: |
| This paper studied the effects of Cd^2 ＋ , Pb^2 ＋ and Cr^3 ＋ on the superoxidc dismutase （SOD） , catalase （CAT） activity of Litopenaeus vannamei in serum. The results showed that the SOD and CAT activity were induced significantly under low - lying - moderate concentration of Cd^2 ＋ , Pb^2 ＋ and Cr^3 ＋ ions. The SOD and CAT activity was inhibited significantly under difinite time and upper concentration of Cd^2 ＋ , Pb^2 ＋ and Cr^3 ＋ ions, while there was an obvious dose - time response relationship. Low Cd^2 ＋ , Pb^2 ＋ and Cr^3 ＋ ion concentrations increased the activities of SOD and CAT activity significantly （P 〈 0.05） in postlarvae, the SOD and CAT activity was significantly inhibited with increased concentration and prolonged exposure of Cd^2 ＋ ,Pb^2 ＋ and Cr^3 ＋ ions, and that the effects of combined pollutant was heavier than those of single pollutant. The syn ergystic function of Cd^2 ＋ ,Pb^2 ＋ and Cr^3 ＋ ions was obvious, thus, the active proportion of SOD and CAT was maladjusted under intimidated metal ions, which braught physiological decompensation, conescenee and death. |
| 韩照祥,吕春霞.2008.重金属离子对凡纳滨对虾的致病机理研究[J].水生态学杂志,29(1):69-0. |
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