Junidi H, Hissam J, Belousov L V
Ontogenez. 1983 Mar-Apr;14(2):209-12.
The mitotic indices (MI) were measured on serial transverse sections in ecto- and mesoderm of different dorsoventral zones of the X. laevis embryos from the late blastula stage till the end of neurulation. The MI were shown to fall simultaneously in mesoderm of all zones during the transition from middle to late gastrula (stages 12 and 13) and in ectoderm of all zones at the late gastrula stage (12 1/2 and 13) and rise synchronously in the dorsal and lateral ectoderm and lateral mesoderm during neurulation. In the most cases the rise of MI coincided with the periods of active morphogenetic movements of the given area and the fall of MI with the cessation of these movements.
在非洲爪蟾胚胎不同背腹区域的外胚层和中胚层中，从囊胚晚期直至神经胚形成末期，在连续的横切面上测量有丝分裂指数（MI）。结果显示，在从中期原肠胚向晚期原肠胚过渡（第12和13阶段）时，所有区域的中胚层中的MI同时下降，在晚期原肠胚阶段（第12.5和13阶段）所有区域的外胚层中的MI也同时下降，而在神经胚形成期间，背侧和外侧外胚层以及外侧中胚层中的MI同步上升。在大多数情况下，MI的上升与给定区域活跃的形态发生运动时期相吻合，而MI的下降则与这些运动的停止相吻合。
