Uptake,Depuration and Subcellular Distribution of Cadmium in Various Tissues of Perna viridis

查看全文 作　　者：M. S. YANG;S. T. CHIU AND M. H. WONG(Department of Biology and Center for Waste Recycling and Environmental Biotechnology, Hong Kong Baptist University, Kowloon Tong, Hong Kong) 出　　处：《Biomedical and Environmental Sciences》索引1995年第8卷第2期,共10页 摘　　要：Green-lipped mussels (Perna viridis) were collected from a local mariculture site and placed in pre-cleaned sea water tanks containing 0, 0.2, 0.5 and 1.3 μg/ml CdCl2. The level of Cd in the gill, viscera and gonad was measured. The concentration of Cd in the 3 tissues increased linearly over 4 days’ of exposure. The rate of uptake depends on the concentration of Cd in the water. In the 3 tissues studied, the maximum rate of uptake (Vmax) was highest in the gill (500μg/g dry weight/day), followed by viscera (100μg/g dry weight/day) and gonad (56.8 μg/g dry weight/day). The majority of the Cd taken up was bound to a fraction of the heat-stable proteins similar to metallothioneins. The rate of Cd depuration from the tissues was poor. There was no change in Cd concentration over 8 days’ depuration in clean 关 键 词：贝类 软体动物 镉吸收 镉滤过 组织类型 亚细胞分布