Chitosan oligosaccharide-Ca complex accelerates the depuration of cadmium from Chlamys ferrari |
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| Authors: | Guoqing Huang Jipeng Sun Dongfeng Wang Ying Xu Wei Xu |
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| Institution: | HUANG Guoqing1), 2), SUN Jipeng1), WANG Dongfeng1), *, XU Ying1), and XU Wei1) 1) College of Food Science and Engineering, Ocean University of China, Qingdao 266003, P. R. China 2) College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266009, P. R. China |
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| Abstract: | This study investigated the effect of a chitosan oligosaccharide-Ca complex (COS-Ca) on the depuration of cadmium (Cd) from
Chlamys ferrari. After exposure to 0.5 mg L−1 CdCl2 for 3 or 7 d, the scallops were treated by COS-Ca prior to determination of Cd, calcium (Ca) and zinc (Zn) contents, Cd distribution
in organs, malondialdehyde (MDA) content and antioxidant variables. Results showed that COS-Ca reduced Cd content in the viscera
of the scallops, with highest Cd depuration rate (47%) observed on day 3. The COS-Ca concentration substantially affected
Cd depuration, and the exposure to 8.75 mg L−1 COS-Ca led to significantly higher Cd depuration rate compared with those of lower COS-Ca concentrations (1.75, 3.5, 5.25,
and 7.00 mg L−1). Distribution analysis of Cd in scallop organs indicated that COS-Ca significantly reduced Cd content in the kidney throughout
the 5-d experiment, as well as in the gill during the early stage of Cd depuration. In addition, COS-Ca treatment decreased
glutathione peroxidase (GSH-Px) activity and MDA content while increasing superoxide dismutase (SOD) and catalase (CAT) activities
on different days. Our work suggested COS-Ca complex treatment as an effective method for acceleration of Cd depuration from
Cd-contaminated bivalves. |
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| Keywords: | Chitosan oligosaccharide calcium complex cadmium depuration Chlamys Ferrari |
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