Neurons discovered in male Helicoverpa zea antennae that correlate with pheromone-mediated attraction and interspecific antagonism
Neurons discovered in male Helicoverpa zea antennae that correlate with pheromone-mediated attraction and interspecific antagonism
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DOI：
10.1007/s003590050205
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发表时间：
1998-05-01
期刊：
影响因子：
--
通讯作者：
Baker, TC
中科院分区：
文献类型：
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作者：
Cossé, AA;Todd, JL;Baker, TC
采用切感器细胞外记录技术，记录了雄性棉铃虫触角单受体神经元对性信息素成分和行为拮抗剂的反应。从325个位于触角外缘的雄性特异性毛状感器中鉴定出三种类型的感器。这些感受器中的大多数（71%）含有一个对主要性信息素成分(Z)-11-十六烯醛调节的受体神经元。第二种感受器类型（10%）包含一个仅对(Z)-9-十四烯醛有反应的受体神经元。第三种感觉类型（19%）包含一个对次级信息素成分(Z)-9-十六烯醛调节的大脉冲神经元，但这个神经元也可以被同样数量的(Z)-9-十四烯醛刺激到相同的脉冲频率。这种感觉类型的小尖峰神经元对两种已知仅作为行为拮抗剂的化合物(Z)-11-十六烯-1-醇和(Z)-11-十六烯乙酸酯，以及(Z)-9-十四烯醛有反应。交叉适应研究证实，在第三种感觉类型中存在一个大的和一个小的尖峰神经元。与收集到的刺激量相关的剂量反应研究表明，第三种感觉类型的大脉冲神经元对(Z)-9-十六烯醛和(Z)-9-十四烯醛同样敏感，而较小的脉冲神经元对(Z)-11-十六烯-1-醇和(Z)-11-十六烯乙酸酯比(Z)-9-十四烯醛敏感得多。
Responses of single receptor neurons in the antennae of male Helicoverpa rea to sex pheromone components and to behavioral antagonists were recorded using a cut-sensillum extracellular recording technique. Three types of sensilla were identified from sampling 325 male-specific sensilla trichodea located at the lateral edge of antennomeres. The majority of these sensilla (71%) contained a receptor neuron tuned to the principal sex pheromone component (Z)-11-hexadecenal. A second sensillar type (10%) contained a receptor neuron that responded only to (Z)-9-tetradecenal. A third sensillar type (19%) contained a large-spiking neuron tuned to the secondary pheromone component (Z)-9-hexadecenal, but this neuron also could be stimulated to equivalent spike frequencies by the same emitted amounts of (Z)-9-tetradecenal. A smaller-spiking neuron in this sensillar type responded to two compounds known to act only as behavioral antagonists, (Z)-11-hexadecen-1-ol and (Z)-11-hexadecenyl acetate, and to (Z)-9-tetradecenal. Cross-adaptation studies confirmed the presence of one large-and one small-spiking neuron in the third sensillar type. Dose-response studies correlated to collected stimuli amounts showed that the large-spiking neuron in the third sensillar type was equally tuned to (Z)-9-hexadecenal and (Z)-9-tetradecenal, whereas the smaller-spiking neuron was far more sensitive to (Z)-11-hexadecen-1-ol and to (Z)-11-hexadecenyl acetate than to (Z)-9-tetradecenal.