扩张莫尼茨绦虫(绦虫纲:圆叶目)卵黄细胞发育的超微结构(英文)  

Ultrastructure of vitellogenesis in cestode (Moniezia expansa)(Cestoda:Cyclophyllidea)

作　　者：李海云[1] Gerard P.BRENNAN David W.HALTON 

机构地区：[1]华南农业大学动物科学院,广州510642 [2]MedicalBiologyCentre,TheQueen'sUniversityofBelfast,BelfastBT97BL,UK

出　　处：《动物学报》2003年第2期256-261,共6页ACTA ZOOLOGICA SINICA

基　　金：ThisstudywasfundedbythegrantsfromtheNationalNaturalScienceFoundationofChina (No .3 990 0 10 9)andtheNaturalScienceFounda tionofGuangdongProvince (NO .980 12 8)

摘　　要：用透射电镜观察了扩张莫尼茨绦虫 (Monieziaexpansa)卵黄细胞发育的全过程。扩张莫尼茨绦虫卵黄细胞发育的规律为 :(1)细胞体积不断增大 ;(2 )质、核比不断增加而核体积几乎不发生改变 ,核表面从规则变为不规则 ,再由不规则变为规则 ,核内出现染色质浓缩成小块再分散的发育变化过程 ;(3)线粒体逐渐增多 ,发育不断完善 ;(4)粗面内质网及高尔基复合体出现由少到多 ,发育不断完善 ,再由多到少不断退化的变化 ;(5 )由高尔基复合体组装的电子致密的小卵黄囊不断融合 ,至卵黄细胞成熟时仅有一卵黄囊 。Transmission electron microscopic observations have been made on vite llogenesis in the cestode, Moniezia expansa. Four continuous developmental sta ges were evident: (1) an immature gonial stage prior to differentiation; (2) an early stage of differentiation; (3) an advanced stage of differentiation; and (4 ) the mature vitellocyte. Mature vitelline follicles consist of cells in variou s stages of development, distributed irregularly. Maturation of the vitellocyte is completed before the cell leaves the follicle. The process of maturation is c haracterized by: (1) a gradual increase in cytoplasm/nucleus ratio and cell volu me; (2) the presence of large numbers of mitochondria; (3) the appearance of gra nular endoplasmic reticulum and associated Golgi apparatus; (4) the production a t the Golgi of small electron dense vitelline vesicles that fuse and eventually amalgamate into one large vitelline vesicle, filling most of the cell volume.

关 键 词：绦虫纲 圆叶目 扩张莫尼茨绦虫 卵黄细胞 细胞发育 超微结构 

分 类 号：Q954[生物学—动物学]