Comparative physio-chemical study on environmental tolerance of Corbicula japonica

1993年1月至1994年11月在日本岛根县新治湖采集了日本蚬（Corbicula japonica）全组织的生化组成和提取物成分，分析结果表明，日本蚬的水分、蛋白质、脂肪含量的季节变化不大，糖原含量的季节变化较大。2 ~ 6月糖原含量较高，游离氨基酸含量丰富，尤其是丙氨酸和谷氨酸。大多数氨基酸以及提取氮没有表现出显着的季节变化。丙氨酸，谷氨酸，甘氨酸，脯氨酸，和β-丙氨酸在高渗条件下的增加是显着的软体研究，表明这些含氮组分在细胞内的糖调节中发挥重要作用。

Comparative physio-chemical study on environmental tolerance of Corbicula japonicaBiochemical composition, Extractive components in the total tissues of brackish water clam Corbicula japonica were analyzed on the specimens collected monthly from January 1993 to November 1994 at Lake Shinji, Shimane Prefecture.The seasonal variation throughout the year in the contents of moisture, protein, lipid is small, while that of glycogen is large. The content of glycogen was high from February to June.The clam were rich in free amino acids, especially in alanine and glutamic acid. Most amino acids as well as extractive nitrogen did not show a marked seasonal variation. The increase in alanine, glutamic acid, glycine, proline, and beta-alanine under hyperosmotic condition were noticeable in the soft bodies studied, suggesting that these nitrogenous components play a significant role in intracellular osmoregulation.