Induction by the Primitive Streak and its Derivatives in the Chick
Induction by the Primitive Streak and its Derivatives in the Chick
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雏鸡中原始条纹及其衍生物的诱导
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发表时间：
1933
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通讯作者：
C. Waddington
中科院分区：
文献类型：
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作者：
C. Waddington
1.本文描述了几个标本，它们显示了神经板的诱导：（a）原条的中胚层部分，（B）头突和菱形窦，（c）神经板。2.由原条中胚层部分诱导的神经板与宿主胚的方向相反。因此，胚胎的方向必须已经固定在条纹的中胚层部分，并且在这种情况下必须克服宿主可能施加的任何影响。3.同一个胚胎比诱导它的组织的假定命运所表明的更完整，由此得出结论，小鸡的组织者，像两栖动物一样，表现出自我完成的倾向，并且在这种程度上表现得像一个和谐的等电位系统的一部分。4.将胚胎轴的前部（头突和神经板）移植到宿主胚盘的前部，几乎在所有情况下都有头的诱导结构。诱导轴的后部（窦菱形）从来没有给出这样的迹象。5.移植脊索至今还没有令人满意的诱导。
1. Specimens are described which demonstrate the induction of neural plateby (a) the mesodermal part of the primitive streak, (b) the head process and sinus rhomboidalis, and (c) neural plate. 2. The neural plate which was induced by the mesodermal part of the primitive streak was in reversed orientation as regards the host embryo. Thus the orientation of the embryo must be already fixed in the mesodermal part of the streak, and must in this case have overcome any influence which the host may be able to exert. 3. The same embryo was more complete than indicated by the presumptive fate of the tissue which induced it, whence it is concluded that the chick organiser,like the amphibian, shows a tendency to complete itself, and to this extent behaves like part of a harmonious equipotential system. 4. Grafts of the anterior part of the embryonic axis (head process and neuralplate) into the anterior part of the host blastoderm, have induced structures which in nearly all cases give indications of being heads. Inductions by posterior parts of the axis (sinus rhomboidalis) have never given such indications. 5. Grafts of the notochord have not, as yet, given satisfactory inductions.