Yoneda M, Kobayakawa Y, Kubota H Y, Sakai M
J Cell Sci. 1982 Apr;54:35-46. doi: 10.1242/jcs.54.1.35.
Circular waves of change in brightness, known as 'surface contraction waves' (SCW-1 and SCW-2), propagate over the animal surface of amphibian eggs at each cycle of cleavage. Movement of carbon particles attached to the egg surface indicated that SCW-1 involves expansion of the egg surface, whereas SCW-2 accompanies surface contraction. Stiffness of the cortex as measured by applying negative pressure through a micropipette increased concomitantly with the passage of SCW-2. Measurement of stiffness at two loci on the egg surface with two sets of pipettes confirmed the spatio-temporal coincidence of the wave of stiffness and SCW-2. The stiffness showed either no change or even a slight decrease on passage of SCW-1. Thus SCW-2 is a genuine wave of 'contraction', but SCW-1 can more properly be called a 'surface relaxation wave'.
亮度变化的圆形波，即“表面收缩波”（SCW - 1和SCW - 2），在两栖动物卵的每次卵裂周期中在动物极表面传播。附着在卵表面的碳颗粒的运动表明，SCW - 1涉及卵表面的扩张，而SCW - 2伴随着表面收缩。通过微量移液器施加负压测量的皮质硬度随着SCW - 2的通过而增加。用两组移液器在卵表面的两个位点测量硬度，证实了硬度波与SCW - 2在时空上的重合。在SCW - 1通过时，硬度要么没有变化，甚至略有下降。因此，SCW - 2是真正的“收缩”波，但SCW - 1更恰当地可称为“表面松弛波”。
