Hunger is the best spice: effects of starvation in the antennal responses of the blood-sucking bug Rhodnius prolixus.
Hunger is the best spice: effects of starvation in the antennal responses of the blood-sucking bug Rhodnius prolixus.
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饥饿是最好的调味品：饥饿对吸血昆虫Rhodnius prolixus触角反应的影响。
DOI：
10.1016/j.jinsphys.2014.09.009
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发表时间：
2014
影响因子：
2.2
通讯作者：
Reisenman,CarolinaE
中科院分区：
文献类型：
--
作者：
Reisenman,CarolinaE
吸血昆虫强烈依赖嗅觉线索来寻找它们的脊椎动物宿主。与其他具有不同生活方式的昆虫一样，已经证明内源性和外源性因素调节嗅觉反应。长三角蝽是恰加斯病的重要媒介，也是研究恰加斯病生理和行为的经典模型。在这个物种中，对宿主产生的气味的行为反应是由一天中的时间和饥饿调节的。在这里，我研究了这些调节作用背后的外周神经机制。为此，我测量了昆虫对不同浓度（从0.5%到75%体积/体积）的有吸引力的宿主气味剂氨的触角电图（EAG）反应。我在白天（昆虫不活动，聚集在避难所）和晚上（昆虫开始活动，寻找宿主）测试了饥饿和喂食的动物的反应。无论在一天中的什么时间和饥饿状态下，EAG反应都随着气味浓度的增加而系统地增加，从而准确地反映了嗅觉受体细胞的反应。有趣的是，仅在夜间，饥饿昆虫的EAG反应大于喂食昆虫，在中低浓度下差异更大（6-7倍）。这项研究是首次报道在神经水平上调节三尖蝽的感觉反应。考虑到triatomine宿主大多是白天活动的，也是潜在的捕食者，这种调节具有重要的适应价值，确保昆虫只在饥饿和适当的时间寻找宿主。
Blood-sucking insects strongly rely on olfactory cues to find their vertebrate hosts. As in other insects with different lifestyles, it has been shown that endogenous and exogenous factors modulate olfactory responses. The triatomine bugRhodnius prolixusis an important vector of Chagas disease and a classical model for studies of physiology and behavior. In this species, the behavioral response to host-derived odorants is modulated by both the time of the day and the starvation. Here I investigated the peripheral neural mechanisms underlying these modulatory effects. For this, I measured the electroantennogram (EAG) responses of insects towards different concentrations (from 0.5% to 75% vol/vol) of an attractive host-odorant, ammonia. I tested the responses of starved and fed animals during the middle of the day (when insects are inactive and aggregated in refuges) and at the beginning of the night (when insects become active and search for hosts). Regardless of the time of the day and the starvation status, EAG responses systematically increased with odorant concentration, thus accurately reflecting the response of olfactory receptor cells. Interestingly, the EAG responses of starved insects were larger than those of fed insects only during the night, with larger differences (6–7 times) observed at low–middle concentrations. This study is the first reporting modulation of sensory responses at the neural level in triatomines. This modulation, considering that triatomine hosts are mostly diurnal and are also potential predators, has an important adaptive value, ensuring that insects search for hosts only when they are hungry and at appropriate times.
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DOI：
--
发表时间：
1990
期刊：
影响因子：
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DOI：
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DOI：
--
发表时间：
1995
期刊：
Journal of Comparative Physiology
影响因子：
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作者：
J. Taneja;P. Guerin
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影响因子：
2.8
作者：
P. Guerenstein;Patrick M. Guerin
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