Kwiatkowska M, Maszewski J
Folia Histochem Cytobiol. 1985;23(3):127-34.
In antheridial filaments of Chara vulgaris given a 20 min incubation in 3H-uridine and a 40 min period of postincubation the radioactivity of extranucleolar nucleoplasm was found not altered, the radioactivity of nucleoli decreased by some 50%, and the radioactivity of cytoplasm increased by about 50%, as compared with the values obtained from preparations fixed immediately after labelling. During the periods characterized by an enhanced transcriptional activity of nucleoli, i.e. in middle stages of S and G2 phases, the most intensive RNA migration from nucleolus into the cytoplasm takes place. By the end of interphase the rate of the above process becomes slower, thus leading to accumulation of an intranucleolar pool of rRNA reserved for the sake of daughter cells.
在普通轮藻的雄器丝中，用3H-尿苷温育20分钟并进行40分钟的温育后，发现核仁外核质的放射性未改变，核仁的放射性降低了约50%，细胞质的放射性增加了约50%，与标记后立即固定的制剂所获得的值相比。在核仁转录活性增强的时期，即在S期和G2期的中期，RNA从核仁向细胞质的迁移最为强烈。到间期结束时，上述过程的速率变慢，从而导致为子细胞保留的核仁内rRNA池的积累。
