Ruditapes decussatus and Ruditapes philippinarum exposed to cadmium: Toxicological effects and bioaccumulation patterns

被引：44

作者：

Figueira, Etelvina ^{[1
]}

Cardoso, Paulo

Freitas, Rosa ^{[2
]}

机构：

[1] Univ Aveiro, Dept Biol, CBC, P-3810193 Aveiro, Portugal

[2] Univ Aveiro, Dept Biol, CESAM, P-3810193 Aveiro, Portugal

来源：

COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY | 2012年 / 156卷 / 02期

关键词：

Clams; Metal contamination; Cd subcellular partitioning; Tolerance mechanisms; Methallothioneins; SEDIMENT QUALITY ASSESSMENT; TAPES-PHILIPPINARUM; METAL CONTAMINATION; LIPID-PEROXIDATION; CERASTODERMA-EDULE; COASTAL AREAS; POTENTIAL USE; HEAVY-METALS; CLAM; BIOMARKERS;

D O I：

10.1016/j.cbpc.2012.04.004

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Since differences in metal accumulation may exist between bivalve species, the aim of this study was to assess the impact of cadmium (Cd) on Ruditapes decussatus and Ruditapes philippinarum. For this, the Cd accumulation, mortality rates and biochemical responses were analysed in the two species after 5 days of exposure, under laboratory-controlled conditions. The concentration of Cd that caused 50% of mortality on clams was two-times higher in R. decussatus than in R. philippinarum. For both species, higher percentage (84.5-98.2%) of the Cd was in the insoluble fraction, but the Cd concentration in solution was 3 to 8 times higher in R. decussatus. Nevertheless, R. philippinarum presented higher oxidative stress and higher CAT activity. The paradox observed between the two clams can be explained by the higher capacity of R. decussatus to increase the expression of MTs when exposed to Cd. (c) 2012 Elsevier Inc. All rights reserved.

引用

页码：80 / 86

页数：7

共 56 条

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