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首页> 外文期刊>Cell and Tissue Research >Afferent neural pathways from the photoperiodic receptor in the bean bug, Riptortus pedestris
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Afferent neural pathways from the photoperiodic receptor in the bean bug, Riptortus pedestris

机译：来自豆臭虫的光/周周期受体的传入神经途径，Riptortus Pedestris

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Adult diapause in the bean bug, Riptortus pedestris, is controlled by the photoperiod, which is received by retinal cells in the central region of the compound eyes. To resolve the afferent neural pathways involved in the photoperiodic response, we examine fibre projections from the photoperiodic receptors to the brain and investigate the roles of the posterior optic tract (POT) in the photoperiodic response. Reduced-silver impregnation and synapsin immunolabelling revealed that the medulla was divided into nine strata: the outer layer comprises 4 strata, the inner layer comprises 4 strata and a serpentine layer separates the inner and outer layers. Biotin injection revealed that retinal fibres from the central region of the compound eye terminated in either the central part of the lamina or the central part of the medulla 3rd or 4th layer. Biotin injection into the central part of the medulla labelled 5 distinct afferent pathways: two terminated in a region of ipsilateral anterior protocerebrum, while the other three had contralateral projections. One pathway ran through the POT and connected to the bilateral medulla serpentine layers. When the POT was surgically severed, diapause incidence under short-day conditions was significantly reduced compared to that observed following a sham operation. However, an incision at a posterior part of the medulla and lobula boundary, as a control experiment, did not affect the photoperiodic response. These results suggest that photoperiodic signals from the central region of the compound eye are transferred to neurons with fibres running in the POT for photoperiodic response in R. pedestris.
机译：在豆虫中的成人延展，Riptortus peestris由光周期控制，通过复合眼中央区域的视网膜细胞接收。为了解决涉及光学响应中的传入神经途径，我们将来自光周期受体的纤维突起检查到脑中，并研究后视槽（POT）在光学周期反应中的作用。减少银浸渍和Synapsin免疫标注显示，髓质被分成九个层次：外层包括4个层，内层包括4个层，蛇形层分离内层和外层。生物素注射揭示了来自复合眼的中央区域的视网膜纤维终止于椎板的中心部分或髓质3或第4层的中心部分。生物素注射到髓质中的中心部分标记为5个不同的传入途径：两个终止于同侧前翼面的区域，而另外三个具有对侧投影。一个途径通过锅并连接到双侧髓质蛇纹石层。当手术切断罐时，与假手术后观察到的相比，在短日情况下，在短日情况下的延伸发病率显着降低。然而，作为对照实验的Medulla和叶片边界的后部的切口不影响光周期反应。这些结果表明，来自复合眼的中央区域的光周期信号被转移到具有在R. peactris中的孔中的纤维的纤维转移到神经元。

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