Seasonal Variation of the Glycogen Enzyme Activity in Diploid and Triploid Pacific Oyster Gonad During Sexual Maturation  

作　　者：KONG Lingfeng WANG Zhaoping YU Ruihai LI Qi WANG Rucai 

机构地区：[1]College of Fisheries, Ocean University of China, Qingdao 266003, P. R. China

出　　处：《Journal of Ocean University of China》2007年第4期383-386,共4页中国海洋大学学报（英文版）

基　　金：This study was supported by the 863 Program （2004AA603820 and 2006AA10A401）;the National Natural Science Foundation （39900111 and 30771662）.

摘　　要：The glycogen content and the activities of two key enzymes in glycogen metabolism, glycogen phosphorylase and gly- cogen synthetase, in the gonad of diploid and triploid Pacific oysters (Crassostrea gigas) were compared during maturation. The glycogen content in the gonad of diploids decreased with gametogenesis (by 85.7%), but the glycogen content in the gonad of trip- loids did not vary significantly. Activity of glycogen phosphorylase (GP) in the gonad of diploids decreased with gametogenesis (by 55.5%), while GP activity of triploids did not vary significantly during maturation. Activity of glycogen synthetase (GS) in the gonad of diploids increased slightly with gametogenesis, reaching a peak in June. Activity of GS declined sharply from June to July, which might be due to gonad spawning. GS activity of triploid oysters in spawning time (July and August) was significantly higher than that in other months, which might be explained with a ‘compensating’ mechanism for the higher glycogen content in triploids.The glycogen content and the activities of two key enzymes in glycogen metabolism, glycogen phosphorylase and glycogen synthetase, in the gonad of diploid and triploid Pacific oysters （Crassostrea gigas） were compared during maturation. The glycogen content in the gonad of diploids decreased with gametogenesis （by 85.7%）, but the glycogen content in the gonad of triploids did not vary significantly. Activity of glycogen phosphorylase （GP） in the gonad of diploids decreased with gametogenesis （by 55.5%）, while GP activity of triploids did not vary significantly during maturation. Activity of glycogen synthetase （GS） in the gonad of diploids increased slightly with gametogenesis, reaching a peak in June. Activity of GS declined sharply from June to July, which might be due to gonad spawning. GS activity of triploid oysters in spawning time （July and August） was significantly higher than that in other months, which might be explained with a ＇compensating＇ mechanism for the higher glycogen content in triploids.

关 键 词：Pacific oyster DIPLOID TRIPLOID glycogen metabolism GAMETOGENESIS 

分 类 号：Q178.53[生物学—水生生物学]