Octopamine modulates insect mating and Oviposition

文献类型： 外文期刊

第一作者： Liu, Dandan

作者： Liu, Dandan;Chiqin, Fang;Nyamwasa, Innocent;Cao, Yazhong;Yin, Jiao;Zhang, Shuai;Li, Kebin;Zhang, Xinxin;Feng, Honglin

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关键词： Holotrichia parallela; Octopamine; Reproduction; Mating; Oviposition; Egg hatchability; Survival rate

期刊名称：JOURNAL OF CHEMICAL ECOLOGY （ 影响因子：2.793； 五年影响因子：2.97 ）

ISSN： 0098-0331

年卷期：

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收录情况： SCI

摘要： The neuro-mechanisms that regulate insect reproduction are not fully understood. Biogenic amines, including octopamine, are neuromodulators that have been shown to modulate insect reproduction in various ways, e.g., promote or inhibit insect mating or oviposition. In this study, we examined the role of octopamine in regulating the reproduction behaviors of a devastating underground insect pest, the dark black chafer (Holotrichia parallela). We first measured the abundance of octopamine in different neural tissues of the adult chafer pre- and post-mating, demonstrating that octopamine decreased in the abdominal ganglia of females but increased in males post-mating. We then fed the adult H. parallela with a concentration gradient of octopamine to test the effects on insect reproductive behaviors. Compared with its antagonist mianserin, octopamine at the concentration of 2 mu g/mL resulted in the highest increase in males' preference for sex pheromone and females' oviposition, whereas the mianserin-treatment increased the survival rate and prolonged the lifespan of H. parallela. In addition, we did not observe significant differences in egg hatchability between octopamine and mianserin-treated H. parallela. Our results demonstrated that octopamine promotes H. parallela mating and oviposition with a clear low dosage effect, illustrated how neural substrates modulate insect behaviors, and provided insights for applying octopamine in pest management.

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