TISSUE DISPOSITION OF CD-109(2+) IN THE BROWN TROUT (SALMO-TRUTTA) STUDIED BY AUTORADIOGRAPHY AND IMPULSE COUNTING
TISSUE DISPOSITION OF CD-109(2+) IN THE BROWN TROUT (SALMO-TRUTTA) STUDIED BY AUTORADIOGRAPHY AND IMPULSE COUNTING
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DOI：
10.1080/02772248609357148
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发表时间：
1986-01-01
影响因子：
1.8
通讯作者：
BJORKLUND, I
中科院分区：
文献类型：
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作者：
TJALVE, H;GOTTOFREY, J;BJORKLUND, I
本研究用不同浓度的~（109）Cd ~（2+）（0.1、0.5、1.0和10.0μg/l）对褐鳟（萨尔莫trutta）进行为期1 ~ 2周的暴露试验。然后通过全身放射自显影和伽马光谱法检查109 Cd 2+在组织中的分布。富集~（109）Cd ~（2+）最高的组织是嗅器、鳃和肾干。放射自显影显示，在嗅觉器官中，嗅觉玫瑰花结、嗅觉神经和大脑嗅球前部的上皮细胞有标记。镉可能被嗅上皮的神经细胞吸收，并通过轴突运输到大脑嗅球的轴突末梢。鳃中的109 Cd 2+占总体内镉负荷的75%~ 40%，在水中镉浓度最低和暴露间隔1周时，其比例最高。暴露2周后，肾脏中的~（109）Cd ~（2+）浓度明显高于暴露1周后的浓度。肝脏蓄积了相当浓度的~（109）Cd ~（2+）。最低的~（109）Cd ~（2+）水平记录在肌肉中。当水中109 Cd 2+的浓度为0.1、0.5和1.0 μg/l时，鱼对109 Cd 2+的平均全鱼积累约为50-100倍，而当109 Cd 2+的浓度为10μg/l时，平均生物积累减少到约10-20倍。当~（109）Cd ~（2+）浓度为10μg/l时，鳃的饱和吸收比其它组织明显。我们的研究结果表明，一些组织的褐鳟鱼能够强烈地集中镉从低水浓度。镉在嗅器中的积累表明镉可能对嗅觉有害。
Brown trouts,Salmo trutta,were exposed to109Cd2+in concentrations of 0.1, 0.5, 1.0 and 10.0μg/1 in aquarial water during 1 or 2 weeks. The disposition of the109Cd2+in the tissues was then examined by whole‐body autoradiography and gamma spec‐trometry. The tissues accumulating the highest levels of109Cd2+were the olfactory apparatus, the gills and the trunk kidney. The autoradiography showed that in the olfactory apparatus there was a labelling of the epithelium of the olfactory rosette, the olfactory nerve and the anterior part of the olfactory bulb of the brain. The cadmium is probably taken up in the nerve cells in the olfactory epithelium and transported via axonal transport to the axonal terminations in the olfactory bulb of the brain. The109Cd2+in the gills comprised from about 75% to about 40% of the total body burden of the metal, the highest proportions being present at the lowest cadmium concentrations in the water and at the 1 week exposure interval. The109Cd2+in the kidney, which was strongly localized to distrinct areas in the trunk kidney, was present in much higher concentrations after 2 weeks exposure than after 1 week exposure. The liver accumulated a considerable concentration of109Cd2+. The lowest109Cd2+levels were registered in the muscles. The average whole‐fish accumulation of the109Cd2+by the fishes was about 50–100 times at the 0.1, 0.5 and l.0μg/1 concentrations of the metal in the water, whereas at 10μg/l of109Cd2+the average bioaccumulation had diminished to about 10–20 times. The saturation of the uptake in the tissues at the 10μg/l concentration of the109Cd2+was more marked in the gills than in the other tissues. Our results show that some tissues of the brown trout are able to strongly concentrate cadmium from low water concentrations. The accumulation in the olfactory apparatus suggests that cadmium may be injurious for the olfactory sense.