异毛虫形成包囊过程中细胞皮层及纤毛结构分化的扫描电镜观察

Scanning Electron Microscopic Observations on the Differentiation of Cortex and Cilia during the Encystment of Allotricha curdsi (Ciliophora:Hypotrichida)

在纤毛虫无性生殖中,生命活动受阻时经常会发生形成包囊的现象。研究纤毛虫的包囊现象,已成为揭示真核细胞的结构与功能、细胞模式形成与控制机理的一个重要方面。目前,对腹毛目纤毛虫中游仆虫类包囊的形态及其生理生化特征已进行了较系统的研究,积累了较多的资料,

The details of the differentiation of cortex and cilia during the encystment of the hypotrichous ciliate Allotricha curdsi were observed with scanning electron microscopy.The results showed that,during the cells transforming from the long oval shape into soccer form,the dedifferentiation of microtubular organelles on ventral side happened,meanwhile,the unit of dorsal bristle started to redifferentiation with a new cilia growing from the previously barren kinetosome.As cells contracted further,the cyst wall began to emerge and the protrusions arranged regularly on the cyst surface simultaneously.After the cyst changing from cactus-like shape to spiral-like shape,the resting cyst formed.Without improving the culturing environment,the resting cysts finally disintegrated and disappeared.The results presented in this paper provided new information for better understanding the differentiation of the cilia structure and the formation of the cytoplasm derivatives in special physiological conditions.