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首页> 美国卫生研究院文献>PLoS Clinical Trials >Changes in Odor Background Affect the Locomotory Response to Pheromone in Moths
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Changes in Odor Background Affect the Locomotory Response to Pheromone in Moths

机译：气味背景的变化影响飞蛾对信息素的运动反应。

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摘要

Many animals rely on chemical cues to recognize and locate a resource, and they must extract the relevant information from a complex and changing odor environment. For example, in moths, finding a mate is mediated by a sex pheromone, which is detected in a rich environment of volatile plant compounds. Here, we investigated the effects of a volatile plant background on the walking response of male Spodoptera littoralis to the female pheromone. Males were stimulated by combining pheromone with one of three plant compounds, and their walking paths were recorded with a locomotion compensator and analyzed. We found that the addition of certain volatile plant compounds disturbed the orientation toward the sex pheromone. The effect on locomotion was correlated with the capacity of the plant compound to antagonize pheromone detection by olfactory receptor neurons, suggesting a masking effect of the background over the pheromone signal. Moths were more sensitive to changes in background compared to a constant background, suggesting that a background odor also acts as a distracting stimulus. Our experiments show that the effects of odorant background on insect responses to chemical signals are complex and cannot be explained by a single mechanism.
机译：许多动物依靠化学线索来识别和定位资源，它们必须从复杂且不断变化的气味环境中提取相关信息。例如，在飞蛾中，寻找伴侣是由性信息素介导的，该信息素在丰富的挥发性植物化合物环境中被检测到。在这里，我们调查了挥发性植物背景对雄性斜纹夜蛾对雌性信息素的行走反应的影响。通过将信息素与三种植物化合物之一结合来刺激雄性，并使用运动补偿器记录其行走路径并进行分析。我们发现，添加某些挥发性植物化合物会扰乱性信息素的方向。对运动的影响与植物化合物拮抗嗅觉受体神经元信息素检测的能力有关，暗示了背景对信息素信号的掩盖作用。与恒定的背景相比，蛾子对背景的变化更敏感，这表明背景气味也可以分散注意力。我们的实验表明，加味剂背景对昆虫对化学信号的响应的影响是复杂的，无法用单一机制来解释。

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