Bertaux O, Frayssinet C, Valencia R
C R Acad Hebd Seances Acad Sci D. 1976 Mar 29;282(13):1293-6.
The chromosomes and nucleolus of the Euglenineae remain visible in electron microscopy throughout the cell cycle. This peculiarity allowed to show cyclic variations of the nucleus structure in synchronized cells of Euglena gracilis Z: I. different stages of chromosome condensation was observed; 2. ultrastructural modifications in the organization of the nucleolus were evidenced, characterized by its apparent continuity ("open appearence") or discontinuity ("closed appearance") with the nucleoplasm.
在整个细胞周期中，裸藻科的染色体和核仁在电子显微镜下均可见。这一特性使得能够在纤细裸藻Z的同步化细胞中展现细胞核结构的周期性变化：1. 观察到染色体凝聚的不同阶段；2. 证实了核仁组织的超微结构变化，其特征是核仁与核质之间呈现明显的连续性（“开放外观”）或不连续性（“封闭外观”）。
