首页> 外文期刊>Journal of Medical Entomology >Presence of Putative Male-Produced Sex Pheromone in Lutzomyia cruciata (Diptera: Psychodidae), Vector of Leishmania mexicana
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Presence of Putative Male-Produced Sex Pheromone in Lutzomyia cruciata (Diptera: Psychodidae), Vector of Leishmania mexicana

机译:拟南芥(Lutzomyia cruciata)(Diptera:Psychodidae),墨西哥利什曼原虫媒介中存在男性推定的性信息素

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Lutzomyia cruciata (Coquillet) is a vector of cutaneous leishmaniasis in Mexico and Central America. However, several aspects of its ecology and behavior are unknown, including whether a male pheromone partially mediates the sexual behavior of this sand fly. In this study, we evaluated the behavioral response of females to male abdominal extracts in a Y-tube olfactometer. The volatile compounds from male abdominal extracts were identified by gas chromatography-mass spectrometry and compared with those of female abdominal extracts. Finally, the disseminating structures of the putative sex pheromone were examined by scanning electron microscopy in the male abdomen. Females were more attracted to male abdominal extract than to the hexane control, suggesting the presence of male-produced sex pheromone. The male abdominal extracts were characterized by the presence of 12 sesquiterpene compounds. The major component, an unknown sesquiterpene with an abundance of 60%, had a mass spectrum with molecular ion of m/z 262. In contrast, the abdominal female extracts contained saturated fatty acids. Finally, we detected the presence of small "papules" with a mammiform morphology distributed on the abdominal surface of tergites IV-VII of male Lu. cruciata. These structures are not present in females. We conclude that Lu. cruciata males likely produce a pheromone involved in attracting or courting females.
机译:Lutzomyia cruciata(Coquillet)是墨西哥和中美洲皮肤利什曼病的媒介。然而,其生态学和行为的几个方面是未知的,包括雄性信息素是否部分介导了这种沙蝇的性行为。在这项研究中,我们在Y型管嗅觉仪中评估了女性对男性腹部提取物的行为反应。用气相色谱-质谱法鉴定雄性腹部提取物中的挥发性化合物,并将其与雌性腹部提取物中的挥发性化合物进行比较。最后,通过扫描电子显微镜检查了男性腹部中假定的性信息素的分布结构。女性对男性腹部提取物的吸引比对己烷对照组的吸引更大,表明存在男性产生的性信息素。男性腹部提取物的特征是存在12种倍半萜烯化合物。主要成分是未知的倍半萜,其丰度为60%,其质谱的分子离子为m / z262。相反,腹部雌性提取物含有饱和脂肪酸。最后,我们检测到雄性陆龟IV-VII的腹部表面上分布着乳腺状形态的小“丘疹”。十字花科。这些结构在女性中不存在。我们得出结论。雄性十字花科植物可能会产生一种信息素,从而吸引或吸引女性。

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