短尾鮠精子细胞和精子的超微结构研究  

ULTRASTRUCTURE OF SPERMATOBLAST AND SPERM INLEIOCASSIS BREVICAUDATUS

作　　者：张汉峰[1] 魏刚[1] 黄林[1] 代大临[1] 陈永强[1] 张运明[1] 

机构地区：[1]西南大学生命科学学院

出　　处：《西南农业大学学报（自然科学版）》2005年第5期696-699,共4页Journal of Southwest Agricultural University

基　　金：重庆市科委自然科学基金资助项目(2005BB1107)

摘　　要：用透射电镜观察了短尾鮠精子细胞和精子的形态以及细胞核、拟染色体和线粒体等的结构变化规律。结果表明,随着精子细胞的发育,核质凝聚程度逐渐增强。精子细胞时期细胞器较丰富,到精子细胞后期,细胞器的形态和数量发生了较大变化。短尾鮠的精子具有椭圆的头部和复杂的中片;近侧中心粒和远侧中心粒靠近核的中央;鞭毛呈9+2轴丝结构,并具有由外膜折迭形成的波浪形的鳍状结构。Transmission electron microscopy was performed to study the morphology of the spermatoblast and sperm in the spermary of the catfish （Leiocassis brevicaudatus Wu） and the changes in the structure of their nucleus, mitochondria and chromatoid bodies. The electron density in the chromatin showed a steady increase with the development of the spermatoblast. Plenty of organelles were observed in the spermatoblast. At later stages of spermatoblast, the morphology and number of the organelles changed substantially. The sperm of L. brevicaudatus , with a short round head, a complicated midpiece and two centrioles, appeared to differ from that of other teleost fishes in the fine structure. Its mitochondria, nuclear vacuole and pocket were shown in the section through the midpiece of the sperm. The axoneme had a 9 ＋ 2 pattern and possessed undulating membrane.

关 键 词：短尾鮠 精子细胞 精子 超微结构 

分 类 号：Q959.4[生物学—动物学]