三疣梭子蟹胚胎发育过程中消化系统的发生和发育  

Genesis and Development of the Digestive System of the Swimming Crab,Portunus trituberculatus,in the Embryo

作　　者：薛俊增[1] 堵南山[1] 赖伟[2] 

机构地区：[1]杭州师范学院生物系,杭州310036 [2]华东师范大学生物系,上海200062

出　　处：《Zoological Research》2001年第5期375-378,T001-T002,共6页动物学研究（英文）

基　　金：国家自然科学基金资助项目 ( 39370 0 89)

摘　　要：对三疣梭子蟹 (Portunustrituberculatus)不同发育阶段的胚胎进行连续组织切片 ,以揭示其消化系统的发生和发育。结果显示前肠、中肠和后肠皆发生于原肠胚期。前肠在第 1期卵内状幼体阶段发育成胃与食道 ,胃开口于卵黄囊 ;后肠肠上皮细胞在第 1、 2期卵内无节幼体阶段尚未形成有序排列 ,至第 1期卵内状幼体时始形成后肠腔 ,到第 2期卵状幼体时与中肠连接 ;中肠在第 2期卵内状幼体阶段发育成杯状结构 ,孵化前与前肠贯通 ,形成完整的消化系统。In order to explain the genesis and development of the digestive system,we studied the embryonic development of the swimming crab, Portunus trituberculatus ,by histological section.The results showed that the foregut,mid gut and hind gut arised in the gastrulating stage.The foregut differentiated an esophagus and a stomach in the egg zoea Ⅰ.The stomach opened to the yolk sac.The hind gut epithelial cell did not arrange in order during the egg naupliusⅠand Ⅱ.The epithelial cell formed hind gut cavity in the egg zoea Ⅰ.The hind gut touched with the mid gut in the egg zoea Ⅱ.The mid gut developed to a cup like structure in the egg zoea Ⅱ.The digestive system formed when the mid gut touched with foregut before hatching.

关 键 词：三疣梭子蟹 胚胎发育 消化系统 

分 类 号：Q959.223.63[生物学—动物学]