Response of the seven-spot ladybird to an aphid alarm pheromone and an alarm pheromone inhibitor is mediated by paired olfactory cells
Response of the seven-spot ladybird to an aphid alarm pheromone and an alarm pheromone inhibitor is mediated by paired olfactory cells
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DOI：
10.1023/a:1005555300476
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发表时间：
2000-07-01
影响因子：
2.3
通讯作者：
Woodcock, CM
中科院分区：
文献类型：
--
作者：
Al Abassi, S;Birkett, MA;Woodcock, CM
利用触角上单个嗅细胞（神经元）记录的方法，研究了七星瓢虫成虫对蚜虫报警信息素（E）-β-法尼烯和植物源报警信息素抑制剂（-）-β-香芹烯的电生理反应。鉴定了对两种化合物中的每一种具有高特异性的细胞。此外，这两种细胞类型经常被发现非常接近，对于特异性响应于（E）-β-法呢烯的细胞始终记录有较大的振幅。在双向嗅觉仪中的初步行为研究表明，步行的成年人明显被（E）-β-法尼烯所吸引;这种活性随着（-）-β-香芹烯比例的增加而被抑制。
Electrophysiological responses of adult seven-spot ladybirds, Coccinella septempunctata, to (E)-beta-farnesene, an aphid alarm pheromone, and (-)-beta-caryophyllene, a plant-derived alarm pheromone inhibitor, were investigated by recording from single olfactory cells (neurons) on the antenna. Cells having high specificity for each of the two compounds were identified. Furthermore, these two cell types were frequently found in close proximity, with a larger amplitude consistently recorded for the cell responding specifically to (E)-beta-farnesene. preliminary behavioral studies in a two-way olfactometer showed that walking adults were significantly attracted to (E)-beta-farnesene; this activity was inhibited with increasing proportions of (-)-beta-caryophyllene, The possible ecological significance of colocation or pairing of olfactory cells for semiochemicals with different behavioral roles is discussed.