Bogner F, Boppré M, Ernst K D, Boeckh J
J Comp Physiol A. 1986 Jun;158(6):741-9. doi: 10.1007/BF01324818.
The tips of the labial palps of Rhodogastria possess a pit housing uniform sensilla, histologically characterized by wall-pores and receptor cells with lamellated outer dendrites. The receptor cell axons project to glomeruli in the deutocerebrum which are not innervated by antennal receptors. From their histology as well as from their central projection these sense organs are identical with palpal pit organs of other Lepidoptera (Lee et al. 1985; Kent et al. 1986; Lee and Altner 1986). Physiologically, the palp-pit receptors respond uniformly; they are most excitable by stimulation with carbon dioxide while they exhibit relatively moderate responses to various odorants. The responses to CO2 show a steep dose-response characteristic. In ambient atmosphere (i.e., ca. 0.03% CO2) the cells are in an excited condition already; the seeming 'spontaneous activity' exhibited in air is decreased if the preparation is kept under N2 or O2 or CO2-free air. There is hardly any adaptation of the responses to continuous or repeated stimulation. Perhaps CO2 sensitivity is correlated with sensilla characterized by both wall-pores and lamellated dendrites. Pilot tests indicate that CO2 perception might be widespread in the Lepidoptera, but the biological significance remains obscure.
红腹夜蛾唇须的尖端有一个容纳均匀感器的凹陷，组织学特征为有壁孔和具有片状外树突的感受细胞。感受细胞轴突投射到中脑的神经小球，而触角感受器不会支配这些小球。从它们的组织学以及中枢投射来看，这些感觉器官与其他鳞翅目昆虫的唇须凹陷器官相同（Lee等人，1985年；Kent等人，1986年；Lee和Altner，1986年）。在生理上，唇须凹陷感受器的反应是一致的；它们对二氧化碳刺激最易兴奋，而对各种气味剂的反应相对适中。对二氧化碳的反应呈现出陡峭的剂量反应特性。在周围大气中（即约0.03%的二氧化碳），细胞已经处于兴奋状态；如果将标本置于氮气、氧气或无二氧化碳的空气中，在空气中表现出的看似“自发活动”就会降低。对连续或重复刺激的反应几乎没有适应性。也许二氧化碳敏感性与具有壁孔和片状树突特征的感器有关。初步试验表明，二氧化碳感知可能在鳞翅目中很普遍，但其生物学意义仍不清楚。
