CELL DIVISION WITHOUT MITOTIC APPARATUS IN SEA URCHIN EGGS
CELL DIVISION WITHOUT MITOTIC APPARATUS IN SEA URCHIN EGGS
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DOI：
10.1016/0014-4827(56)90171-9
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发表时间：
1956-01-01
影响因子：
3.7
通讯作者：
HIRAMOTO, Y
中科院分区：
文献类型：
--
作者：
HIRAMOTO, Y
通过将纺锤体和紫苑与周围的细胞质一起吸入插入卵中的微量吸管中，从心海胆（Clypeaster）的卵中取出纺锤体和紫苑。在分裂后期或以后纺锤体被移走时，可以发生分裂。在某些卵中，甚至在中期有丝分裂器完全去除时，仍会出现沟。无论纺锤体被完全去除还是被部分卵原生质去除而在细胞质内移位，卵裂面的位置都不受影响。这表明，开沟的结果从活跃的功能，细胞皮层，反过来，是内部结构（核或有丝分裂器）的影响下。
Spindle and asters were removed from eggs of the heart urchin, Clypeaster japonicus, by sucking them with the surrounding cytoplasm into a micropipette inserted into the egg. Cleavage can take place when the spindle is removed during anaphase or later. In some eggs, the furrow appears even when the mitotic apparatus is removed completely during metaphase. The position of the cleavage plane is unaffected whether the spindle is removed completely or displaced within the cytoplasm by the removal of a part of egg protoplasm. It is suggested that furrowing results from the active function of the cell cortex which, in turn, is under the influence of the internal structures (nucleus or mitotic apparatus).