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首页> 外文期刊>Chemical Senses >Morphological and Physiological Characteristics of the Serotonin- Immunoreactive Neuron in the Antennal Lobe of the Male Oriental Tobacco Budworm, Helicoverpa assulta
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Morphological and Physiological Characteristics of the Serotonin- Immunoreactive Neuron in the Antennal Lobe of the Male Oriental Tobacco Budworm, Helicoverpa assulta

机译：雄性东方烟芽虫Helicoverpa assulta的尾叶中5-羟色胺免疫反应神经元的形态和生理特征

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摘要

We have characterized, by intracellular recording and staining combined with immunocytochemistry, a serotonin-immunoreactive neuron in the central olfactory pathway of the male moth Helicoverpa assulta. The neuron joins the unique category of so-called SI antennal-lobe neurons, previously described in several insect species. In similarity with that originally discovered in the sphinx moth Manduca sexta, the neuron identified here has a large soma located posteriorly in the lateral cell cluster of the antennal lobe and an unbranched neurite projecting into the ipsilateral protocerebrum via the inner antennocerebral tract. After bypassing the central body, the axon crosses the midline and extends through the corresponding antennocerebral tract to the contralateral antennal lobe where it innervates the entire assembly of glomeruli including the male-specific macroglomerular complex. The neuron arborizes into several fine branches in bilateral protocerebral regions anterior to the calyces of the mushroom bodies, particularly on the contralateral side. The physiology of the neuron revealed 2 distinctly different spiking amplitudes, 1 small showing a relatively high spontaneous activity and 1 large showing low activity. The small-amplitude spikes displayed increased frequency when pheromones and plant odors were blown over the antenna. The large-amplitude spikes, which had an unusually long duration, showed no observable responses.
机译：通过细胞内记录和染色结合免疫细胞化学，我们已经表征了雄蛾蛾拟青蛾的中央嗅觉途径中的血清素免疫反应性神经元。神经元加入了先前在几种昆虫中描述过的所谓的SI触角叶神经元的独特类别。与最初在狮身人面像蛾Manduca sexta中发现的相似，此处鉴定出的神经元位于触角叶外侧细胞簇的后方，有一个大的体细胞，并且无分支的神经突通过内侧的前脑脑血管伸入同侧的原脑。绕过中心体后，轴突穿过中线，并延伸穿过相应的腱脑通道，到达对侧触角叶，在那里神经支配整个肾小球组件，包括雄性特定的大肾小球复合体。神经元在蘑菇体的花萼前，特别是在对侧，在双侧前脑区乔木成几个细小分支。神经元的生理学揭示了2个明显不同的尖峰幅度，1个小峰显示了相对较高的自发活动，1个大峰显示了较低的活动。当信息素和植物气味吹过天线时，小振幅尖峰显示出增加的频率。持续时间异常长的大幅度尖峰没有明显的响应。

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