Central projections from contact chemoreceptors of the locust ovipositor and adjacent cuticle
Central projections from contact chemoreceptors of the locust ovipositor and adjacent cuticle
复制标题
蝗虫产卵器和邻近角质层的接触化学感受器的中心投影
作者：
E. Tousson;R. Hustert
抽象。位于蝗虫产卵器和生殖器节上的接触化学感受器（锥形感受器）用于控制产卵前和产卵期间底物的化学特征。它们分散地出现，也拥挤在对触摸或风敏感的机械感觉外感受器（触角状和丝状感受器）之间的区域。选择性染色的中枢神经投射的四个化学感觉和一个机械感觉神经元从单一的basiconic感受器，集中在产卵器阀，通常接触的基板在产卵前探测运动的受体。来自一个接触化学感受器的所有轴突和神经突通常在它们的大多数投射中保持紧密在一起。分离主要发生在单个轴突终止于一个神经节，而其他轴突继续到不同的神经节或神经节。对于从一个化学感受器的预测，有证据表明，无论是从化学感受传入终端的机械感觉功能隔离，也不为特定的隔离不同的化学感受传入。背角质层感器的投射趋向于沿着终节中线较均匀地投射。触摸和风敏感的毛受体神经元的比较染色显示主要是中央的预测，类似于那些相邻的接触化学感受器。从典型的intersegmented预测的大多数初级传入和缺乏隔离成肾小球结构，我们得出结论，从生殖器段的化学感受信息的整合分布在终端和第7腹神经节。
Abstract. Contact chemoreceptors (basiconic sensilla) located on the ovipositor and genital segments of the locust serve to control the chemical features of the substrate before and during oviposition. They occur dispersed and also crowded in fields between mechanosensory exteroceptors sensitive to touch or wind (trichoid and filiform sensilla). The central nervous projections of the four chemosensory and one mechanosensory neurons from single basiconic sensilla were stained selectively, focusing on receptors on the ovipositor valves, which usually contact the substrate during the pre-oviposition probing movements. All axons and neurites from one contact chemoreceptor usually stay close together in most of their projections. Segregation occurs mainly when single axons terminate in one neuromere while the others proceed to a different neuromere or ganglion. For projections from one chemoreceptor, there is evidence neither for functional segregation of mechanosensory from chemosensory afferent terminals nor for specific segregation between different chemosensory afferents. The projections from sensilla of dorsal cuticle tend to project rather uniformly along the midline of the terminal ganglion. Comparative staining of touch- and wind-sensitive hair receptor neurons shows mostly central projections, similar to those of neighbouring contact chemoreceptors. From the typical intersegmental projections of most primary afferents and from the lack of segregation into glomerular structures, we conclude that integration of chemosensory information from the genital segments is distributed in the terminal and the 7th abdominal ganglion.
DOI：
10.1242/jeb.122.1.413
发表时间：
1986
期刊：
The Journal of experimental biology
影响因子：
--
作者：
Thompson,KJ
通讯作者：
Thompson,KJ
DOI：
10.1242/jeb.155.1.487
发表时间：
1991
期刊：
The Journal of experimental biology
影响因子：
--
作者：
P. L. Newland
通讯作者：
P. L. Newland
DOI：
10.1242/jeb.122.1.387
发表时间：
1986
期刊：
The Journal of experimental biology
影响因子：
--
作者：
Thompson,KJ
通讯作者：
Thompson,KJ