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Toxic effects of chromium on amphioxus (Branchiostoma belcheri)

Lin Jiahan; Lin Hainin; Huang Zhibing(Department of Biology, Xiamen University, Xiamen, 361005)Fang Yongqiang(Third Institute of Oceanography, SOA, Xiamen, 361005)  
The paper reports the toxic effects of chromium (Cr6+ and Cr3+ ) at different concen-traions on amphioxus. The results showed that the toxiclty of Cr6+ was higher than that ofCr3+, and the toxic effects of chromium on the animal were concerned with the in habitatsoll. The toxicity of chromium in sandy water was lower than that in nonsandy waterI thehistology observation indicated that the poisoned organs of the anima1 is cluded gill, intestineand muscle. The two species of chromium induced the gill cell to necrote, intestinal villi todrop off and muscle to wither. The toxic effects destroed the functions of the respiration,absorption and motion, and resulted in the death of the anima1 although the appropriatedosage of Cr6+ and Cr3+ could promote the growth of amphioxus.
【Fund】: 国家自然科学基金!39070129
【CateGory Index】: X174
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