A volatile sex attractant of tsetse flies.

A volatile sex attractant of tsetse flies.
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DOI:
10.1126/science.ade1877
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发表时间:
2023-02-17
期刊:
Science (New York, N.Y.)
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其他
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采采蝇传播锥虫,这种寄生虫会在撒哈拉以南非洲的大部分地区给人类和牲畜带来毁灭性的疾病。通过挥发性信息素进行化学通讯在昆虫中很常见。然而,这种化学通讯是否以及如何在采采蝇中发生仍有待阐明。我们鉴定出棕榈油酸甲酯 (MPO)、油酸甲酯和棕榈酸甲酯是采采蝇 Glossina morsitans 产生的化合物,可引起强烈的行为反应。 MPO 会引起雄性 G. morsitans 的行为反应,但不会引起未交配的雌性 G. morsitans 的行为反应。当 G. morsitans 雄性接受 MPO 处理时,雄性 G. fuscipes 骑在雌性身上。我们进一步鉴定了 G. morsitans 中的嗅觉神经元亚群,这些亚群会增加对 MPO 的反应,并表明用非洲锥虫感染果蝇会改变化学特征和交配行为。采采蝇中挥发性引诱剂的鉴定可能有助于减少疾病传播。棕榈油酸甲酯是采采蝇的挥发性性引诱剂。
Tsetse flies transmit trypanosomes, parasites that cause devastating diseases in humans and livestock across much of sub-Saharan Africa. Chemical communication through volatile pheromones is common among insects; however, whether and how such chemical communication occurs in tsetse flies remain to be elucidated. We identified methyl palmitoleate (MPO), methyl oleate, and methyl palmitate as compounds that are produced by the tsetse fly Glossina morsitans and elicit strong behavioral responses. MPO evoked a behavioral response in male but not virgin female G. morsitans. G. morsitans males mounted females of another species, G. fuscipes, when they were treated with MPO. We further identified a subpopulation of olfactory neurons in G. morsitans that increase their firing rate in response to MPO and showed that infecting flies with African trypanosomes alters the chemical profile and mating behavior. The identification of volatile attractants in tsetse flies may be useful for reducing disease spreading. Methyl palmitoleate is a volatile sex attractant in tsetse flies.
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