作　　者： ; ; ; ;

机构地区： 杭州师范大学生命与环境科学学院

出　　处： 《激光生物学报》 2007年第4期449-454,共6页

摘　　要： 采用透射电镜观察中国石龙子精子的形成过程。结果表明:早期精细胞中有高尔基复合体和线粒体集合,由高尔基复合体所分泌的前顶体囊泡,逐渐向核移动,以后的过程可分为四个时期。时期Ⅰ:前顶体囊泡移至核膜时,核膜凹陷形成封闭的顶体囊泡,囊泡底部靠近核膜处有一电子致密的顶体颗粒,近端中心粒及鞭毛开始出现。时期Ⅱ:顶体囊泡变扁平,细胞核延长,染色质浓缩成短丝状的染色质纤维。时期Ⅲ:核进一步延长,染色质纤维变粗变长,按核纵向排列有序。时期Ⅳ:染色质纤维浓缩至最大限度,电子透明的核质消失,核呈高电子致密,顶体复合体发育完全。 The uhrastructure of spermiogensis of Eumeces chinensis is described. The results show that there are Golgi complex and mitochondrial aggregate in the early spermatids, and the proacrosomal vesicle secreted by Golgi complex mons toward the nucleus ; Subsequent courses of spermatid differentiaion can be derided into four stages, Stage Ⅰ ： The nucleus forms a concavity to accommodate the proacrosomal vesicle, and acrosomal vesicle comes into being. In this stage, an acrosomal grnule is also first seen in the deepest point of the acrosomal vesicle, facing the center of the nuclear concavity, and the proximal centriole and flagellum appearing. Stage Ⅱ ： The nucleus enlongates and pushes the posterior surface of the acrosomal vesicle upward giving it a flattened appearance, and chromatin condenses into fibers like short filaments. Stage Ⅲ ： The nucleus goes on prolonging and the chromatin fibers changes into chromatin threads which are o- riented parallel to the long axis of the nucleus. Stage Ⅳ ： The nuclear chromatin theads become so dense that no internal structures can be resolved, At the end of this stage, the acrosomal complex is well-developed,

关 键 词： 精子发生 超微结构 中国石龙子

领　　域： [生物学] [生物学]