Cell movement on light adaptation in the retina of Lethocerus (Belostomatidae, Hemiptera)
Cell movement on light adaptation in the retina of Lethocerus (Belostomatidae, Hemiptera)
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Lethocerus（Belostomatidae，半翅目）视网膜中光适应的细胞运动
DOI：
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发表时间：
1971
期刊：
影响因子：
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通讯作者：
B. Walcott
中科院分区：
文献类型：
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作者：
B. Walcott
摘要1.巨型水蝽的小眼结构（Lethocerus，Belostomatidae），以及在光/暗适应时发生的细胞运动。2.在每个小平面下的四个锥细胞将厚角膜连接到八个小网膜细胞的横纹。3.在光适应眼中，四个锥细胞形成直径为5 μm，长40 μm的晶体束。其在重着色的初级色素细胞之间传递到横纹肌（图1A和1B）。4.然而，在暗适应眼中，横纹肌离角膜近40 μm，并进入视锥细胞（图1，2）。1、5）。没有水晶束。初级色素细胞横向移位，光路直径约20 μ m。6、8）。这些细胞的运动可以起到瞳孔的作用，减少到达光适应眼的横纹的光量。
Summary1.The ommatidial structure of a giant water bug (Lethocerus, Belostomatidae) is described, as well as the cell movements that occur on light/dark adaptation.2.Four cone cells beneath each facet connect the thick cornea to the rhabdomeres of the eight retinula cells.3.In the light-adapted eye, the four cone cells form a crystalline tract, 5 μm in diameter and 40 (μm long, which passes between heavily pigmented primary pigment cells to the rhabdomeres (Figs. 1, 2).4.In the dark-adapted eye, however, the rhabdomeres are 40 μm closer to the cornea and indent into the cone cells (Figs. 1, 5). There is no crystalline tract. The primary pigment cells are laterally displaced and the diameter of the light path is about 20 μm.5.Microtubules are abundant in the cone cells and primary pigment cells (Figs. 6, 8). They are oriented in the direction of the cell movement that occurs on light/dark adaptation.6.These cell movements may act as a pupil, reducing the amount of light reaching the rhabdom in the light-adapted eye.