Speksnijder J E, Sardet C, Jaffe L F
Marine Biological Laboratory, Woods Hole, Massachusetts 02543.
Dev Biol. 1990 Nov;142(1):246-9. doi: 10.1016/0012-1606(90)90168-i.
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.
海鞘卵受精后会产生一到两打周期性的钙脉冲（J.E. 斯佩克斯尼德、D.W. 科森、C. 萨德特和L.F. 贾菲，1989a，《发育生物学》135卷，第182 - 190页）。我们研究了这些脉冲的空间模式，发现它们在离散区域起始，并以波的形式传播。最初的几次脉冲在动物半球起始，而后续的脉冲大多在植物极附近起始。这种植物极波之后通常会伴随着卵表面的收缩。由于这些波在传播过程中会衰减，它们会反复使植物极区域暴露于更多的钙。本文讨论了这些重复钙波的机制及其在建立模式或完成减数分裂中可能发挥的作用。
