Periodic calcium waves cross ascidian eggs after fertilization.
Periodic calcium waves cross ascidian eggs after fertilization.
复制标题
DOI：
10.1016/0012-1606(90)90168-i
复制
发表时间：
1990-11
影响因子：
2.7
通讯作者：
J. Speksnijder;C. Sardet;L. Jaffe
中科院分区：
文献类型：
--
作者：
J. Speksnijder;C. Sardet;L. Jaffe
海鞘卵对受精的反应是一至二十次周期性的钙脉冲（J.E.斯佩克斯奈德湾W.科尔森角Sardet和L. F. Jaffe，1989a，Dev. 135，182 -190）。我们研究了这些脉冲的空间模式，发现它们是在离散区域中启动的，并从这些区域中以波的形式传播。最初的几个脉冲开始于动物半球，而后来的脉冲大多开始于植物极附近。这种植物波通常伴随着卵表面的收缩。由于这些波在传播时会衰减，因此它们会反复使植物极区域暴露于更多的钙。这些重复的钙波的机制和他们可能在建立模式或完成减数分裂的作用进行了讨论。
Ascidian eggs respond to fertilization with one to two dozen periodic calcium pulses (J. E. Speksnijder, D. W. Corson, C. Sardet, and L. F. Jaffe, 1989a,Dev. Biol.135,182–190). We examined the spatial pattern of these pulses and found that they are initiated in discrete regions from which they propagate as waves. The first few pulses start in the animal hemisphere, whereas the later ones are mostly initiated near the vegetal pole. Such vegetal waves are often followed by a contraction of the egg surface. Since these waves are attenuated as they spread, they repeatedly expose the vegetal pole region to more calcium. The mechanism of these repetitive calcium waves and their possible role in establishing pattern or completing meiosis is discussed.