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| Effects of Salinity on Histological Structure of Digestive System in Snail Onchidium st ruma |
| SHEN Yonglong,HUANG Jintian,GE Xianping |
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Abstract Snail Onchidium struma was cultured at various salinities of 5 ,15 ,25 ,35 ,or 45 to evaluate the effects of salinity on histological structure and ultrastructure of the digestive system .The salinity was found to significantly affect the structure of pylorus ,cardia ,heptopancreas and intestine .The pyloric stomach and cardiac cells were shown to be to some extent contracted with the increase in salinity ,and some cells of the hepatopancreas were dissolved at low salinity ,and seriously damaged at high salinity , cavity being observed in the cells at a salinity of 35—45 under scanning electronic microscopy . T he intestinal villus height and digestive and absorptive area were found to be gradually reduced to flat at a salinity of 35—45 under a scanning electron microscope . T he histological analysis indicates that the appropriate culture of O .struma is conducted at a salinity of 15 .
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Received: 25 April 2015
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