Altner H, Sass H, Altner I
Cell Tissue Res. 1977 Jan 20;176(3):389-405. doi: 10.1007/BF00221796.
On the antennae of Periplaneta americana, 25 chemo-, hygro- or thermosensitive sensilla were investigated electrophysiologically and, after marking, by transmission and scanning electron microscopy. A clear-cut relationship of functional types to structural types was observed. Two different stimulus conducting structures were observed: a) pore tubules which are found only in smooth, single-walled sensory pegs and b) secretion-filled canals which occur only in grooved double-walled sensilla. Temperature- and humidity-sensitive receptors occur only in double-walled sensilla with secretion material as the stimulus conducting system. Olfactory sensory cells were found in both types, however, those with a specific sensitivity for short-chain n-alcohols are restricted to single-walled pegs with pore tubules, while those which are most sensitive to short-chain n-acids and amines are found in double-walled sensilla, sometimes together with thermosensitive units. The stimulus conducting systems may control the access of odorous substances to the dendritic membranes and thus contribute to the discriminatory properties of the sensilla.
对美洲大蠊触角上的25个化学、湿度或温度敏感感器进行了电生理学研究，并在标记后通过透射电子显微镜和扫描电子显微镜进行观察。观察到功能类型与结构类型之间存在明确的关系。观察到两种不同的刺激传导结构：a）仅在光滑的单壁感觉栓中发现的孔道小管，以及b）仅在有凹槽的双壁感器中出现的充满分泌物质的通道。温度和湿度敏感感受器仅存在于以分泌物质作为刺激传导系统的双壁感器中。两种类型的感器中均发现了嗅觉感觉细胞，然而，对短链正醇具有特定敏感性的嗅觉感觉细胞仅限于具有孔道小管的单壁感觉栓，而对短链正酸和胺最敏感的嗅觉感觉细胞则存在于双壁感器中，有时还与温度敏感单元在一起。刺激传导系统可能控制有气味物质进入树突膜，从而有助于感器的辨别特性。
