Sex-Specific Antennal Sensory System in the Ant Camponotus japonicus: Glomerular Organizations of Antennal Lobes
Sex-Specific Antennal Sensory System in the Ant Camponotus japonicus: Glomerular Organizations of Antennal Lobes
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DOI：
10.1002/cne.22326
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发表时间：
2010-06-15
影响因子：
2.5
通讯作者：
Nishikawa, Michiko
中科院分区：
文献类型：
--
作者：
Nakanishi, Aki;Nishino, Hiroshi;Nishikawa, Michiko
蚂蚁在社会生活中有发达的化学感受系统。我们研究的目标是了解蚂蚁化学感觉系统的功能组织的种姓和性别特异性差异的基础上。在这里，我们描述了常见的和性别特异性的肾小球组织的主要嗅觉中心，触角叶的木匠蚂蚁Camponotus的。两条触角神经的差异标记显示，触角叶中有7条感觉束（从腹侧到背侧的T1-T7）支配不同的肾小球簇。T7神经支配10个肾小球，其中9个接收厚轴突终端几乎完全从腹触角神经。Coelocapitular（hygro-/thermoreceptive），coeloconic（thermoreceptive），壶腹（CO2-receptive）的感受器，紧密并列在鞭毛，住一个或三个大的感觉神经元供应厚轴突专门腹侧触角神经。因此，这些轴突被认为在所有三个等级中投射到T7肾小球中。工蚁和处女雌蚁有大约140个T6肾小球，而雄蚁完全没有这些肾小球。雌性特有的锥体感器（表皮烃受体）包含超过130个感觉神经元，完全缺乏男性的触角。这些感觉神经元可能投射到工蜂和处女雌蜂触角叶的T6肾小球。5-羟色胺免疫阳性神经元支配的T1-T5和T7肾小球，但不T6肾小球工人和处女女性。由于男性没有相当于T6肾小球，马槟榔素免疫阳性神经元似乎支配所有肾小球在男性的触角叶。因此，工蚁和处女雌蚁的T6肾小球是雌性特有的，可能与殖民地中雌性特有的任务有关，而不是与性行为有关。J. Comp.神经元518：2186-2201，2010. (C)2010 Wiley-Liss，Inc.
Ants have well-developed chemosensory systems for social lives. The goal of our study is to understand the functional organization of the ant chemosensory system based on caste- and sex-specific differences. Here we describe the common and sex-specific glomerular organizations in the primary olfactory center, the antennal lobe of the carpenter ant Camponotus japonicus. Differential labeling of the two antennal nerves revealed distinct glomerular clusters innervated by seven sensory tracts (T1-T7 from ventral to dorsal) in the antennal lobe. T7 innervated 10 glomeruli, nine of which received thick axon terminals almost exclusively from the ventral antennal nerve. Coelocapitular (hygro-/thermoreceptive), coeloconic (thermoreceptive), and ampullaceal (CO2-receptive) sensilla, closely appositioned in the flagellum, housed one or three large sensory neurons supplying thick axons exclusively to the ventral antennal nerve. These axons, therefore, were thought to project into T7 glomeruli in all three castes. Workers and virgin females had about 140 T6 glomeruli, whereas males completely lacked these glomeruli. Female-specific basiconic sensilla (cuticular hydrocarbon-receptive) contained over 130 sensory neurons and were completely lacking in males' antennae. These sensory neurons may project into T6 glomeruli in the antennal lobe of workers and virgin females. Serotonin-immunopositive neurons innervated T1-T5 and T7 glomeruli but not T6 glomeruli in workers and virgin females. Because males had no equivalents to T6 glomeruli, serotonin-immunopositive neurons appeared to innervate all glomeruli in the male's antennal lobe. T6 glomeruli in workers and virgin females are therefore female-specific and may have functions related to female-specific tasks in the colony rather than sexual behaviors. J. Comp. Neurol. 518:2186-2201, 2010. (C) 2010 Wiley-Liss, Inc.