【摘要】 为研究纤毛虫休眠状态下细胞的分化及其胞器的特征, 本文以透射电镜术显示, 魏氏拟尾柱虫(Paraurostyla weissei) 休眠包囊中, 颗粒层壁内有小泡, 表膜位置也偶见小泡样结构, 大部分线粒体以多个相互聚集在一起, 自噬泡将线粒体等胞器包裹在内经历消化过程, 细胞内膜系统十分发达。作者推测, 颗粒层及表膜小泡可能是休眠细胞经由表膜进行物质交换的结构, 自噬泡消化现象可能是细胞中物质和能量来源的主要途径。更多还原

【Abstract】 An electron microscopic study of resting cysts and their organelles in Paraurostyla weissei has revealed that:⑴The cyst wall is composed of four layers named from outside to inside:ectocyst,mesocyst,endocyst,and granular layer.The granular layer is delimited by the cell pellicle.Both the layer and pellicle contain a few vesicles.⑵Tubular mitochondria are apparent contrast to their surrounding cytoplasm.The mitochondria are mostly converged to each other,except that a few of those separately scattered in cytoplasm.⑶There are a lot of autophagic vacuoles which contain digested ,undigested mitochondria and other organelles,and,these vacuoles undergo digestivelly cyclic changes.⑷The well developed endomembrane system are widely dispersed over cytoplasmic area.It is supposed from these observations that:⑴The above vesicle are the structure of resting cell,which would be used in exchange for the matter between the granular layer and cytoplasm on both sides of the pellicle.⑵The digestion within autophagic vacuoles might be the main way to supply material and energy in the resting cell.And,as an important source,the membranous structures,which exist in the cytoplasm,would be used to form the membrane of autophagic vacuoles.更多还原