CADMIUM RESISTANCE IN DAPHNIA-MAGNA

被引：90

作者：

BODAR, CWM ^{[1
]}

VANDERSLUIS, I ^{[1
]}

VANMONTFORT, JCP ^{[1
]}

VOOGT, PA ^{[1
]}

ZANDEE, DI ^{[1
]}

机构：

[1] STATE UNIV UTRECHT,REPROD PHYSIOL INVERTEBRATES RES GRP,3584 CH UTRECHT,NETHERLANDS

来源：

AQUATIC TOXICOLOGY | 1990年 / 16卷 / 01期

关键词：

Accumulation; Cadmium; Daphnia magna; Metallothionein; Resistance;

D O I：

10.1016/0166-445X(90)90075-Z

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

The potential of the water-flea Daphnia magna to develop resistance to cadmium was investigated. Three successive generations of daphnids were exposed to sublethal cadmium concentrations, and thereafter the cadmium resistance was assessed in acute LC50-tests. Resistance to cadmium was found to be acquired during a single generation. The acquired resistance was lost within 21 days if neonates of cadmium exposed daphnids were placed in cadmium-free test solution. Cadmium resistance thus proved not to be a genetic phenomenon. During a cadmium challenge absorption of cadmium was more rapid in cadmium pre-exposed animals than in control animals. The extent to which the increased resistance might be attributed to the synthesis of metallothionein-like proteins is discussed. © 1990.

引用

页码：33 / 39

页数：7

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