Figure 3–24. Scheme of synchronous (A) and asynchronous (B) nuclear and cell division (Nicolov, 1993). The established asynchronous division of nuclei and cells shown by cytological pictures in Figures 3–18—3–23 was also confirmed by other research methods. I shall dwell on some of them briefly. In a synchronized cell culture of Scenedesmus acutus the dynamics of increasing the number of nuclei in one cell cycle was studied. As seen from the data in Table 11, in the cells there are registered as even number of nuclei — 2, 4, 8 and 16, as well as uneven number — 3, 5 and 7.
The presence of five nuclei in one cell with obviously great differences
in their sizes (Fig. 3–25) is a proof in favour of their asynchronous
reproduction. The presented electron micrograph shows average results of
a number of consecutive cuts, beginning with the top of nuclei and ending
with their bottom.