Dallai R, Luporini P
Eur J Cell Biol. 1981 Feb;23(2):280-5.
In Euplotes crassus, the ampules which occur in groups that surround the cilia at their base are organelles which, unlike the extrusomes such as mucocysts and trichocysts, persist inside the cytoplasm and are not lost after discharge. By freeze-fracturing cells, we found membrane specializations denoted by the presence of particles arranged in organized patterns, at the attachment sites of the ampules to the plasma membrane. At each attachment site, an annulus and a rosette were observed in the ampule and in the plasma membrane, respectively. On this basis, it was suggested that the ampules of Euplotes might be cortical organelles functioning in secretion and, therefore, phylogenetically related to the other protozoan extrusomes.
在粗壮游仆虫中，成组出现并围绕纤毛基部的壶腹是一种细胞器，与黏液泡和刺丝泡等射出体不同，它们保留在细胞质内，排出后不会丢失。通过对细胞进行冷冻断裂，我们发现在壶腹与质膜的附着部位存在由排列成有序模式的颗粒所指示的膜特化结构。在每个附着部位，分别在壶腹和质膜中观察到一个环和一个玫瑰花结。基于此，有人提出粗壮游仆虫的壶腹可能是在分泌过程中起作用的皮层细胞器，因此在系统发育上与其他原生动物射出体相关。
