| 赵艳民,王新华,孙慧.2008.Hg2+在中华绒螯蟹幼蟹鳃内的积累及其对组织结构的影响.动物学杂志,43(1):1-7. |
| Hg2+在中华绒螯蟹幼蟹鳃内的积累及其对组织结构的影响 |
| Accumulation of Waterborne Mercury in Gills of Juvenile Eriocheir sinensis and Its Effect on Gills Structure |
| 投稿时间：2007-06-25 修订日期：2007-11-19 |
| DOI： |
| 中文关键词: 汞(Hg2+) 中华绒螯蟹 鳃 积累 组织结构 |
| 英文关键词:Mercury(Hg2+) Eriocheir sinensis Gill Accumulation Histoarchitecture |
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| 中文摘要: |
| 采用生态学单因子梯度实验,研究不同浓度汞(Hg2+)的水环境中中华绒螯蟹(Eriocheir sinensis)幼蟹鳃内汞积累情况及对鳃组织结构的影响。结果表明,中华绒螯蟹幼蟹的鳃能够从水环境中迅速积累汞,Hg2+浓度为10、50、100μg/L组的水环境中幼蟹鳃内汞含量分别为4.56、25.53、46.51μg/g干重,均显著高于对照组幼蟹鳃内汞含量1.68μg/g干重(P<0.05);水环境Hg2+浓度为200、300μg/L组的幼蟹鳃内汞含量达到了183.75和283.36μg/g干重,对水体Hg2+蓄积倍数达到了910.35和939.60。光镜观察低浓度组汞能够诱导鳃组织结构发生变化,如上皮细胞肿胀、鳃叶厚度增加、端部膨胀等;高浓度组则会导致鳃叶上皮细胞崩解,鳃组织结构完全破坏。以统计学方法分析了鳃内汞含量同水体汞浓度的相关性,结果表明,两者之间存在明显的相关性,并能够在组织形态上有所体现。鳃是中华绒螯蟹最容易接触水体Hg2+的器官,同时也是蓄积汞的主要器官之一,水体高浓度的Hg2+能够对鳃的组织结构造成明显的破坏,严重影响幼蟹存活率。 |
| 英文摘要: |
| Effects of different waterborne mercury(Hg2+)(0,10,50,100,200,300 μg/L)on accumulation of mercury in the gills of juvenile Eriocheir sinensis were studied by singe gradient factor experiments.Gills of E.sinensis accumulated mercury rapidly from water environment after 40 days' exposed period.The contents of mercury in gills were 4.56,25.53 and 46.51 μg/g dry weight in 10,50 and 100 μg/L Hg2+ waterborne groups,whose values were significantly(P<0.05)higher than control groups.The contents of mercury were 183.75 and 283.36 μg/g dry weight in 200 and 300 μg/L Hg2+ groups and the accumulation rate attained to 910.35 and 939.60.Light microscopic examination showed that the histoarchitecture of gills were changed greatly in low Hg2+ level groups,the changes included the epithelial cells distended,the gill lamellae enlarged,the tips of gill filament swelled seriously.In the 300 μg/L groups,the normal structures of the whole gill lamellae were destroyed completely.The correlation of the accumulation of mercury in gills of E.sinensis to the concentrations of Hg2+ in water was analyzed by biostatistics method,and showed that there was dramatic correlation between them.Exposure to high concentrations groups Hg2+(mercury chloride)was found to result in several alterations in the histoarchitecture of the gills of E.sinensis,and such alterations could affect vital physiological functions,such as respiration,osmotic and ionic regulations of gills,which in turn could ultimately affect the survival and growth of E.sinensis. |
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