Hiramoto Y
Marine Biological Laboratory, Woods Hole, Mass. 02543, U.S.A. and Misaki Marine Biological Station, Miura-shi, Kanagawa-ken 238-02, Japan.
Dev Growth Differ. 1976;18(3):205-209. doi: 10.1111/j.1440-169X.1976.00205.x.
The stiffness of the starfish oocyte was determined from the degree of deformation when it was compressed by a definite force between a pair of parallel plates. The deformation of the oocyte increases during continued application of a constant force, indicating visco-elasticity of the cell. A cyclic change in stiffness of the oocyte accompanying meiotic divisions was found: the stiffness of the oocyte decreases during early stage of meiotic division, increases before the onset of the first polar body formation, then decreases, increases again before the onset of the second polar body formation, and decreases thereafter. Deuteration causes increase in stiffness of the oocyte.
海星卵母细胞的硬度是通过在一对平行板之间用一定力压缩时的变形程度来确定的。在持续施加恒定力的过程中，卵母细胞的变形会增加，这表明细胞具有粘弹性。发现卵母细胞的硬度会随着减数分裂发生周期性变化：在减数分裂早期，卵母细胞的硬度降低，在第一极体形成之前硬度增加，然后降低，在第二极体形成之前再次增加，此后又降低。氘化会导致卵母细胞硬度增加。
