%0 Journal Article
%T STUDIES ON THE COMPARATIVE ULTRASTRUCTURE OF CRAB SPERMATOZOA (Crustacea,Decapoda,Reptantia,Brachyura)<br>蟹类精子超微结构的比较研究
%A DU Nan-shan
%A LAI Wei
%A CHEN Li-qiao
%A XUE Lu-zhen
%A LI Tai-wu
%A WANG Lan
%A <br>堵南山
%A 赖伟
%A 陈立侨
%A 薛鲁征
%A 李太武
%A 王兰
%J 动物学研究
%D 1999
%I Chinese Academy of Sciences
%X Comparative sperm morphology of three species of crab, Portunus trituberculatus,Eriocheir sinensis and Sinopotamon yangtsekiense have been investigated with light and electron microscopes.These sperms are aflagellate and typical brachyurans.SEM observation shows:1)each sperm has a spherical body,2)the anterion part appears smooth,and the other part is uneven,from which 10-20 radial arms radiate,3)there is a ditch ring between the two parts. TEM reveals that each sperm is composed of acrosome,cytoplasmic region,nuclear cup and radial arms.The globular acrosome is a very complicated structure and shows PAS positive.Its centre is a cylindrical acrosomal tubule and its front is an apical cap.The acrosome is limited by an single continuous membrane and surrounded by nuclear cup,which shows Feulgen positive.The nuclear cup contains uncondensed chromatin and is bounded by a complete nuclear envelope.The radial arms are extensions of the nuclear cup.They are stational,then the sperm are immotile.There are no microtubular elements in the arm.The cytoplasmic region is posterior to the acrosome and consists of lamellar complex.Several differences exist the crab spermatozoa in three species.
%K Portunus trituberculatus
%K Eriocheir sinensis
%K Sinopotamon yangtsekiense
%K Crab spermatozoa<br>三疣梭子蟹
%K 中华绒螯蟹
%K 长江华溪蟹
%K 蟹类精子
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=7C502F1A6798ACE1B8C57E291C48C7F1&aid=BC8A95A4A15B2853&yid=B914830F5B1D1078&vid=A04140E723CB732E&iid=94C357A881DFC066&sid=965F4E89CD0AFC30&eid=73648F51F187AC5E&journal_id=0254-5853&journal_name=动物学研究&referenced_num=10&reference_num=14