期刊
ENVIRONMENTAL POLLUTION
卷 192, 期 -, 页码 74-82出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2014.04.012
关键词
Depuration; Cadmium; Zinc; Metallothionein; Gene expression; Corbicula fluminea
资金
- Agence Nationale de la Recherche (ANR) through its program CES (Contamination Ecosystemes Sante) [ANR 08-CES-014]
This study aimed to assess the recovery capacity of the freshwater bivalve Corbicula fluminea subjected to industrial metal discharges (Cd, Zn). After a 24-day exposure in a metal-contaminated river, bivalves were transferred and maintained in the laboratory for one year under metal-free conditions. Metal accumulation, metallothionein production and genetic expressions of genes involved in metal stress were studied. Results demonstrated the high persistence of Cd in tissues (only 73% eliminated after 365 days) whereas Zn was rapidly depurated. The Cd half-life was estimated around 240 days. Metallothioneins were strongly induced within the 28 first days of decontamination, then decreased by 45% after 365 days. The metal exposure of bivalves led to a significant gene induction. After 28 days, most of the genes were no longer overexpressed, suggesting that the bivalves may withstand small amounts of non-essential metals in their tissues without showing signs of detrimental effects on the tested genes. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据