The determination of polarity in the developing insect retina.
The determination of polarity in the developing insect retina.
复制标题
发育中昆虫视网膜极性的测定。
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
P. M. Shelton
中科院分区：
文献类型：
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作者：
P. Lawrence;P. M. Shelton
筋膜钉螺的视网膜是一种极化结构，其中所有的小眼都朝向相同的方向。通过一系列的嫁接实验，我们发现小眼球的取向部分取决于发育它们的表皮的取向，部分取决于寄主眼睛的取向。移植物颠倒假定的眼睛表皮的前腹轴，不会破坏新生小眼的方向。旋转90度或180度的移植物会产生不同的取向模式。在这些情况下，表皮的极性在一定程度上是保守的。显著地，移植物/宿主交界处的小眼位于移植物和宿主的两端之间。小的旋转移植物采用宿主视网膜的极性。将这些结果与类似嫁接对昆虫刚毛图案发育的影响进行了比较。
The retina in Oncopeltus fasciatus is a polarized structure in which all ommatidia are orientated the same way. By a series of grafting experiments we have shown that the orientation of ommatidia is partly dependent upon the orientation of the epidermis from which they develop and partly on the orientation of the host eye. Grafts which invert the forsoventral axis of the presumptive eye epidermis do not disrupt the orientation of the nascent ommatidia. Grafts which are rotated by 90 degrees or 180 degrees produce altered patterns of orientation. The polarity of the epidermis is to some extent conserved in these cases. Significantly ommatidia at the graft/host border take up orientations intermediate between the extremes found in the graft and host. Small rotated grafts assume the polarity of the host retina. These results are compared with the effects of similar grafts on developing insect bristle patterns.