Ferguson D J, Birch-Andersen A, Hutchison W M, Siim J C
Acta Pathol Microbiol Scand B. 1977 Feb;85B(1):110-2. doi: 10.1111/j.1699-0463.1977.tb01682.x.
The ultrastructure of the late sporoblast and the initiation of sporozite formation in E. brunetti was examined in oocysts which had been allowed to sporulate for 24 hours at 27 degrees C. The late sporoblast was ellipsoidal in shape and possessed two nuclei, and with associated Golgi bodies, situated at either end of the organism. Its cytoplasm contained numerous polysaccharide granules, electron translucentral region of the plaques. Sporozoite formation was similar to the initiation of merozoite formation in the schizont. Endodyogeny did not appear to be involved in the process of sporozoite formation.t vacuoles, dense bodies, mitochondria, and some strands of rough endoplasmic reticulum. The sporoblast, at this stage, was enclosed by two unit membranes. Sporozoite formation was initiated by the appearance of a dense plaque at either end of the organism in the vicinity of a nucleus, adjacent to the limiting membrane of the sporoblast. A conoid was present in the central region of the plaques Sporozoite formation was similar to the initiation of merozoite formation in the schizont. Endodyogeny did not appear to be involved in the process of sporozoite formation.
在27摄氏度下让卵囊孢子化24小时后，对布氏艾美耳球虫晚期子孢子母细胞的超微结构和子孢子形成的起始过程进行了检查。晚期子孢子母细胞呈椭圆形，有两个细胞核，以及与之相关的高尔基体，位于生物体的两端。其细胞质含有许多多糖颗粒、空泡、致密体、线粒体和一些粗面内质网链。此时的子孢子母细胞被两层单位膜包围。子孢子的形成始于生物体两端靠近细胞核处、与子孢子母细胞限制膜相邻的致密斑的出现。致密斑的中央区域有一个类锥体。子孢子的形成类似于裂殖体中裂殖子形成的起始过程。内二分裂似乎未参与子孢子的形成过程。
