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《Fisheries Science》 2018-04
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Effect of Cadmium on Ultrastructure of Gill Epithelial Cells in Clam Meretrix meretrix

ZHEN Jingjing;YE Fangyuan;WANG Du;NI Xiaoying;YING Xueping;College of Life and Environmental Science,Wenzhou University;  
The ultrastructural changes in gill epithelial cells were investigated in clam Meretrix meretrix exposed to Cd~(2+) concentrations of 0(as a control),1.5,3,6 and 12 mg/L for 5 days using transmission electron microscopy(TEM)to evaluate the toxic effects of cadmium(Cd)on histopathological alterations of gill epithelial cells in the clam.The results showed that acute cadmium poisoning made remarkable changes in the ultrastructure of gill epithelial cells compared with the control group.The nuclei,mitochondria and microvili in gill epithelial cells were sensitive to acute Cd toxicity,with enhanced destruction of the gill epithelial cells as the concentration of Cd~(2+) was increased.The nuclear appearance was changed and the nuclear membrane was vacuolizated.The mitochondria became swollen and vacuolated gradually,with disintegrated mitochondrial cristae.Microvilli with vacuoles were disintegrated and broken off away and the lysosomes increased in number,volume,and color in sediment accumulation.The structure of the most organelles and endomembrane system were destroyed by Cd~(2+) solution,which is deprived of normal physiological function of gill epithelial cells.
【Fund】: 浙江省自然科学基金资助项目(LY13C04004 LY18C03005);; 国家大学生科技创新训练计划项目(DC2016068)
【CateGory Index】: S917.4;X171.5
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