Cao Jiyu, He Wanjie, Li Huiqin, Zhu Jiangyan, Li Xiaoge, Tian Jiahui, Luo Mengdie, Chen Jing
Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Shihezi University, Shihezi 832000, China.
Yuli Industry Development Service Center of Apocynum Venetum, Yuli 841500, China.
Insects. 2025 May 29;16(6):573. doi: 10.3390/insects16060573.
The antennal sensilla serve as a crucial olfactory organ, enabling insects to detect semiochemicals and adjust their host-seeking and oviposition behaviors accordingly. (Oliver) (Coleoptera: Chrysomelidae), has emerged as a significant agricultural pest that affects key economic crops such as maize and cotton. Despite the development of various control methods based on volatile stimulation, there is still limited documentation on the sensilla involved in olfaction. In this study, the ultrastructure of the sensilla, especially the olfactory sensilla on the antennae of both males and females, was investigated with scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Three types of olfactory sensillum types, including trichodea, basiconica, and coeloconica, and four non-olfactory sensilla including chaetica, campaniformia, auricillica, and Böhm bristle were observed. Sensilla trichodea and basiconica on the antennae of were further classified into two subtypes according to their morphology. For the first time, the pores on the sensilla trichodea, basiconica, and coeloconica cuticular walls were observed in this species, suggesting that they are involved in semiochemical perception. This study contributes new insights into the olfactory system of , which can be integrated with other molecular, genetic, and behavioral research to establish a comprehensive understanding of its physiological functions.
触角感器作为一种关键的嗅觉器官，使昆虫能够检测信息化学物质，并据此调整其寻找宿主和产卵行为。奥利弗叶甲（鞘翅目：叶甲科）已成为一种重要的农业害虫，影响玉米和棉花等关键经济作物。尽管基于挥发性刺激开发了各种防治方法，但关于嗅觉相关感器的文献仍然有限。在本研究中，利用扫描电子显微镜（SEM）和透射电子显微镜（TEM）研究了感器的超微结构，特别是雌雄两性触角上的嗅觉感器。观察到三种类型的嗅觉感器，包括毛形感器、锥形感器和腔锥形感器，以及四种非嗅觉感器，包括刺形感器、钟形感器、耳形感器和博氏鬃毛。根据其形态，触角上的毛形感器和锥形感器进一步分为两个亚型。首次在该物种中观察到毛形感器、锥形感器和腔锥形感器角质壁上的小孔，表明它们参与信息化学物质感知。本研究为奥利弗叶甲的嗅觉系统提供了新的见解，可与其他分子、遗传和行为研究相结合，以全面了解其生理功能。
