CYTOPATHOLOGICAL INVESTIGATIONS OF DIGESTIVE-TRACT AND STORAGE-CELLS IN DAPHNIA-MAGNA EXPOSED TO CADMIUM AND TRIBUTYLTIN

被引:32
作者
BODAR, CWM [1 ]
VANDONSELAAR, EG [1 ]
HERWIG, HJ [1 ]
机构
[1] STATE UNIV UTRECHT, AQUAT TOXICOL RES GRP, UTRECHT, NETHERLANDS
关键词
Cadmium; Cytopathology; Daphnia magna; Digestive tract; Storage cell; Tributyltin;
D O I
10.1016/0166-445X(90)90015-H
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
Histopathological effects on the ultrastructural organization of digestive tract and storage cells of Daphnia magna were examined after a 7-day exposure to cadmium or tributyltin chloride. No distinct cytological changes were noticed in the above-mentioned tissues of D. magna exposed to 10 μg Cd/l. In animals exposed to 20 μg Cd/l, however, there was a slight decline in the glycogen content of the storage cells and some structural changes in the mitochondria of these cells. By contrast, in daphnids exposed to 1 or 5 μg TBTC/l the ultrastructural integrity of storage cells appeared to be seriously affected. In addition, conspicuous lipid accumulations were observed in posterior gut epithelium and in a specific haemolymphatic cell-type of TBTC-exposed D. magna. The results of this histopathological investigation are discussed within the framework of our toxicity studies on the effects of cadmium exposure in Daphnia. © 1990.
引用
收藏
页码:325 / 337
页数:13
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