冠突伪尾柱虫营养期和形成包囊期间细胞的超微结构  

ULTRASTRUCTURE OF THE VEGETATIVE CELL AND RESTING CYST IN PSEUDOUROSTYLA CRISTATA (CILIOPHORA,HYPOTRICHIDA)

作　　者：顾福康[1] 倪兵[1] 杨振云[1] 杜宝剑[1] 

机构地区：[1]华东师范大学生物学系,上海200062

出　　处：《动物学报》2002年第2期251-257,共7页ACTA ZOOLOGICA SINICA

基　　金：国家自然科学基金 (No 396 70 0 90 )~~

摘　　要：冠突伪尾柱虫营养细胞中含有轴杆样结构。细胞形成包囊期间 ,胞质内发生自噬作用 ,并产生由许多膜管聚集在一起组成的高尔基体 ,在高尔基体内其分泌物质聚集成高电子密度的嗜锇晶体。细胞分化的结果形成含颗粒层、内层壁和外层壁的“尾柱虫类包囊”。The study on the structure differentiation and organelle function under different physiological status in ciliates was carried out with transmission electron microscopy. It was shown that an axostyle like structure was present in the cytoplasm of vegetative Pseudourostyla cristata . The structure, which was similar to the flagellate axostyle in shape, might be related to cell shaping and movement. The autophagocytosis took place during encystment of the ciliate, which might be a way to utilize self material and supply energy in the cell. The tubular complex, in which many membranous tubules converged closely together, occurred in the cytoplasm, and the osmiophilic crystals showing high electron density, appeared within the complex. The complex was developed in special physiological condition, which might be Golgi body. The crystals might be a cyst wall precursor secreted by the Golgi body. All the axostyle like structures and ciliary shafts degenerated. A port of the kinetosomes and subpellicular microtubules remained. The cyst wall consisted of granular layer, endocyst and ectocyst, which were formed in succession. Because the cyst was basically similar to that of Urostyla grandis in morphological features, it should be the Urostylidae type cyst.

关 键 词：冠突伪尾柱虫 营养期 包囊 超微结构 营养细胞 自噬作用 高尔基体 

分 类 号：Q959.117[生物学—动物学]