Institute of Animal and Plant Quarantine, Chinese Academy of Inspection and Quarantine, Beijing, China 100029.
J Insect Sci. 2011;11:50. doi: 10.1673/031.011.5001.
Using light and electron microscopy (both scanning and transmission), we observed the presence of sensilla chaetica and hairs on the cerci of the migratory locust, Locusta migratoria L. (Orthoptera: Acrididae). Based on their fine structures, three types of sensilla chaetica were identified: long, medium, and short. Males presented significantly more numbers of medium and short sensilla chaetica than females (p<0.05). The other hairs can also be distinguished as long and short. Sensilla chaetica were mainly located on the distal parts of the cerci, while hairs were mostly found on the proximal parts. Several dendritic branches, enveloped by a dendritic sheath, are present in the lymph cavity of the sensilla chaetica. Long, medium, and short sensilla chaetica contain five, four and three dendrites, respectively. In contrast, no dendritic structure was observed in the cavity of the hairs. By immunocytochemistry experiments only odorant-binding protein 2 from L. migratoria (LmigOBP2) and chemosensory protein class I from the desert locust, Schistocerca gregaria Forsskål (SgreCSPI) strongly stained the outer lymph of sensilla chaetica of the cerci. The other two types of hairs were never labeled. The results indicate that the cerci might be involved in contact chemoreception processes.
利用光学显微镜和电子显微镜（扫描和透射电子显微镜），我们观察到了飞蝗（直翅目：蝗科）尾须上刚毛感器和毛的存在。根据其精细结构，我们鉴定出了三种刚毛感器：长刚毛感器、中刚毛感器和短刚毛感器。雄性中刚毛感器和短刚毛感器的数量明显多于雌性（p<0.05）。其他的毛也可以分为长和短两种。刚毛感器主要位于尾须的远端，而毛则主要位于近端。在刚毛感器的淋巴腔内可以看到几个被树突鞘包裹的树突状分支。长刚毛感器、中刚毛感器和短刚毛感器分别包含五个、四个和三个树突。相比之下，在毛的腔中没有观察到树突状结构。通过免疫细胞化学实验，只有来自飞蝗的气味结合蛋白 2（LmigOBP2）和沙漠蝗的化学感受蛋白 I（SgreCSPI）强烈标记了尾须刚毛感器的外淋巴。其他两种毛从未被标记过。结果表明，尾须可能参与了接触化学感受过程。
