Zhang Xiaoman, Zhang Fan, Luo Chen, Wang Su
Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
Micron. 2014 Dec;67:132-140. doi: 10.1016/j.micron.2014.07.011. Epub 2014 Aug 7.
Encarsia sophia (Hymenoptera: Aphelinidae) is a parasitoid utilized for biological control of Bemisia tabaci, with selection of prey aided by chemoreceptor organs. The morphology and distribution of the antennal sensilla (chemoreceptors) of E. sophia were examined using Transmission electron micrographs. The total antennal length for E. sophia was 429.28±0.95 μm for females and 437.19±8.21 for males, and each antennae was found to consist of seven sensilla of different types. Both sexes possessed sensilla chaetica, sensilla trichodea, basiconic capitate peg sensilla, multiporous grooved-surface placoid sensilla (MG-PS), uniporous rod-like sensilla, nonporous finger-like sensilla, and sensilla coeloconica. Transmission electron micrographs of longitudinal sections of female antennae showed that they were composed of fat body, cuticle, mesoscutello-metanotal muscles, neurons, and glandular tissue, and cross-sections of the basal MG-PS showed sensillar lymph cavities and dendrites. The MG-PSs were imbedded in an electron-dense mass with cuticular invaginations which acted as pores that connected to a central lumen. The possible function of each type of sensilla is discussed.
索氏恩蚜小蜂（膜翅目：蚜小蜂科）是一种用于生物防治烟粉虱的寄生蜂，其捕食选择受化学感受器器官的辅助。利用透射电子显微镜对索氏恩蚜小蜂触角感器（化学感受器）的形态和分布进行了研究。索氏恩蚜小蜂雌蜂触角总长度为429.28±0.95μm，雄蜂为437.19±8.21μm，且发现每根触角由七种不同类型的感器组成。雌雄两性均具有毛形感器、刺形感器、基部具头栓锥感器、多孔槽状板形感器（MG-PS）、单孔杆状感器、无孔指状感器和腔锥感器。雌蜂触角纵切面的透射电子显微镜图像显示，触角由脂肪体、表皮、中胸盾片-后胸背板肌肉、神经元和腺组织组成，基部MG-PS的横切面显示感器淋巴腔和树突。MG-PS嵌入具有表皮内陷的电子致密物质中，表皮内陷充当连接到中央管腔的孔。讨论了每种感器可能的功能。
