锯缘青蟹精子入卵过程的电镜观察.pdfVIP

　第 24 卷第 5 期 水 　产 　学 　报 Vol . 24 , N o . 5 　 　　 　　　　　　　　 　　　　　 　　　　 2000 年 10 月 　 　 Oct . ,2000 　 J OURNAL OF FISHERIES OF CHINA 文章编号 :1000 - 06 15 (2000) 05 - 0403 - 05 锯缘青蟹精子入卵过程的扫描电镜观察 康现江 , 　李少菁 , 　王桂忠 ( 厦门大学海洋学系 ,福建 厦门　361005) 摘要 :利用扫描电镜详细观察了锯缘青蟹精子入卵的过程 。精子以其核突起附着在卵膜上 , 并迅速发生顶 体反应 。顶体反应时,顶体囊外翻 , 顶体管前伸 , 精子核辐射臂收缩 , 并拖至顶体囊的后部 。顶体管迅速 穿过卵黄膜 ,携带核物质一同进入卵子 。锯缘青蟹为多精着卵 ,数精入卵 。本文同时探讨了精子顶体反应 机制以及受精过程卵子的作用 。 关键词 :锯缘青蟹; 受精; 扫描电镜 中国科分类号 :S917 　　　文献标识码 :A Observation on the process of sperm penetration into egg of Scylla serrata with a scanning electron microscope KAN G Xianj iang , 　L I Shaoj ing , 　WAN G Guizhong ( Dep artment of Oceanograp hy , X iamen University , X iamen 　361005 , China) Abstract :The process of sp erm p enetration into egg of Scy lla serrata was examined with a scanning electron microscop e (SEM) in this p ap er . The sp erm contacts with vitelline membrane by its radial arms of the nucleus , and undergoes acrosome reaction immediately . During the process of acrosome reaction , the reversion of acrosonal vesicle , the f orwordextending of the acrosomal tubule and the contraction of the radial arms were observed . The nuclear cup sep arates itself from the acrosome and is p ull at the back of the acrosonal vesicle reversed . While the acrosome tubule p asses through the egg membranes , the nucleus was carried into the egg . Because S . serrata h