Effects of starvation on the olfactory responses of the blood-sucking bug Rhodnius prolixus.
Effects of starvation on the olfactory responses of the blood-sucking bug Rhodnius prolixus.
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DOI：
10.1016/j.jinsphys.2013.04.003
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发表时间：
2013-07
影响因子：
2.2
通讯作者：
Guerenstein PG
中科院分区：
文献类型：
--
作者：
Reisenman CE;Lee Y;Gregory T;Guerenstein PG
吸血昆虫在各种行为环境中使用嗅觉线索，包括寻找宿主和聚集。在注定要吸血的锥蝽中，研究表明，对二氧化碳（一种几乎普遍被吸血昆虫使用的宿主相关嗅觉线索）的反应受到饥饿的调节。对于这些昆虫来说，寻找宿主是一项特别危险的任务，因为它们的宿主也是它们潜在的捕食者。在这里，我们调查了嗅觉反应，以主机衍生的挥发物以外的CO2（壬醛，α-蒎烯和（−）-柠檬烯），有吸引力的气味混合物（酵母挥发物），聚集信息素（存在于粪便中）也调制饥饿的吸血虫Rhodnius prolixus。为此，在暗期开始时使用双选择“T形”嗅觉计分别测试非饥饿和饥饿昆虫的反应，其中其一个臂呈现充满气味的空气，另一个臂呈现无味空气。我们发现，非饥饿的昆虫对寄主气味剂和气味剂混合物的反应是依赖于气味的：当用α-蒎烯测试时，昆虫更喜欢迷宫中充满气味的臂，当用（-）-柠檬烯测试时，迷宫中没有气味的臂，当用酵母挥发物或壬醛测试时，昆虫随机分布。与此相反，饥饿的昆虫显着更喜欢的气味充满手臂的迷宫时，测试主机气味或酵母挥发物。当用聚集信息素测试时，非饥饿的昆虫随机分布在迷宫的臂之间，而饥饿的昆虫更喜欢迷宫的无味臂;甚至更饥饿的昆虫（蜕皮后8-9周）显著地更喜欢迷宫的充满气味的臂。我们假设，这种气味和饥饿依赖的感官反应调制具有很高的适应价值，因为它最大限度地减少了与相关行为相关的成本和风险。这些调制效应的可能的生理机制进行了讨论。
Blood-sucking insects use olfactory cues in a variety of behavioral contexts, including host-seeking and aggregation. In triatomines, which are obligated blood-feeders, it has been shown that the response to CO2, a host-associated olfactory cue used almost universally by blood-sucking insects, is modulated by hunger. Host-finding is a particularly dangerous task for these insects, as their hosts are also their potential predators. Here we investigated whether olfactory responses to host-derived volatiles other than CO2 (nonanal, α-pinene and (−)-limonene), attractive odorant mixtures (yeast volatiles), and aggregation pheromones (present in feces) are also modulated by starvation in the blood-sucking bug Rhodnius prolixus. For this, the responses of both non-starved and starved insects were individually tested at the beginning of the scotophase using a dual-choice “T-shaped” olfactometer, in which one of its arms presented odor-laden air and the other arm presented odorless air. We found that the response of non-starved insects towards host-odorants and odorant mixtures was odor-dependent: insects preferred the odor-laden arm of the maze when tested with α-pinene, the odorless arm of the maze when tested with (−)-limonene, and distributed at random when tested with yeast volatiles or nonanal. In contrast, starved insects significantly preferred the odor-laden arm of the maze when tested with host-odorants or yeast volatiles. When tested with aggregation pheromones, non-starved insects distributed randomly between the arms of the maze, while starved insects preferred the odorless arm of the maze; insects that were even more starved (8–9 weeks post-ecdysis) significantly preferred the odor-laden arm of the maze. We postulate that this odor- and starvation-dependent modulation of sensory responses has a high adaptive value, as it minimizes the costs and risks associated with the associated behaviors. The possible physiological mechanisms underlying these modulatory effects are discussed.
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影响因子：
2.2
作者：
Barrozo, RB;Minoli, SA;Lazzari, CR
通讯作者：
Lazzari, CR
影响因子：
2.2
作者：
Bodin, Aurelie;Vinauger, Clement;Lazzari, Claudio R.
通讯作者：
Lazzari, Claudio R.
影响因子：
2.2
作者：
Bodin, Aurelie;Barrozo, Romina B.;Lazzari, Claudio R.
通讯作者：
Lazzari, Claudio R.
影响因子：
1.9
作者：
NUNEZ, JA
通讯作者：
NUNEZ, JA
影响因子：
2.2
作者：
Olson, J. F.;Moon, R. D.;Kells, S. A.
通讯作者：
Kells, S. A.