Aimar C, Delarue M
C R Acad Hebd Seances Acad Sci D. 1976 May 17;282(19):1737-40.
Transfer of cytoplasm had been made between virgin eggs of two species, species with very different times between activation of the eggs and the first cleavage. The first furrow appears on an average of 6 hrs. after activation in Pleurodeles eggs and 2 hrs. 30 min. in Xenopus eggs. Slow cleaving P. waltlii cytoplasm introduced in quickly cleaving X. laevis eggs acted by delaying the formation of the first cleavage furrow, which appeared more than an hour after Xenopus controls. An opposite effect was obtained with Xenopus cytoplasm in Pleurodeles eggs. Cleavage furrows were obtained 2 hrs. before Pleurodeles controls. The cytoplasmic effect involved in the control of rhythms of cleavage could be related to a clock system.
已经在两种物种的未受精卵之间进行了细胞质转移，这两种物种在卵子激活和第一次卵裂之间的时间差异很大。在有尾螈卵子中，第一次卵裂沟平均在激活后6小时出现，而在非洲爪蟾卵子中则是在2小时30分钟出现。将缓慢分裂的华氏有尾螈细胞质引入快速分裂的非洲爪蟾卵子中，其作用是延迟第一次卵裂沟的形成，该卵裂沟在非洲爪蟾对照卵子出现一个多小时后才出现。在有尾螈卵子中注入非洲爪蟾细胞质则产生了相反的效果。卵裂沟在有尾螈对照卵子之前2小时就出现了。参与卵裂节律控制的细胞质效应可能与一种时钟系统有关。
