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Octopamine modulates insect mating and Oviposition.

Dandan Liu1, Xinxin Zhang2, Fang Chiqin1

  • 1State Key Laboratory for Biology, Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 100193, Beijing, China.

Journal of Chemical Ecology
|June 10, 2022
PubMed
Summary
This summary is machine-generated.

Octopamine, a neuromodulator, promotes mating and oviposition in the dark black chafer (Holotrichia parallela). This study reveals its role in insect reproduction and potential for pest management.

Keywords:
Egg hatchabilityHolotrichia parallelaMatingOctopamineOvipositionReproductionSurvival rate

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Area of Science:

  • Neuroscience
  • Entomology
  • Pest Management

Background:

  • Insect reproduction regulation by neuro-mechanisms is not fully understood.
  • Biogenic amines like octopamine modulate insect reproductive behaviors.
  • The dark black chafer (Holotrichia parallela) is a significant underground insect pest.

Purpose of the Study:

  • To investigate the role of octopamine in regulating the reproductive behaviors of Holotrichia parallela.
  • To understand how octopamine levels change pre- and post-mating.
  • To assess the impact of dietary octopamine on mating, oviposition, survival, and lifespan.

Main Methods:

  • Measuring octopamine abundance in neural tissues of adult H. parallela pre- and post-mating.
  • Feeding adult H. parallela with varying concentrations of octopamine and its antagonist, mianserin.
  • Assessing effects on male pheromone preference, female oviposition, egg hatchability, survival rate, and lifespan.

Main Results:

  • Octopamine levels decreased in female H. parallela abdominal ganglia but increased in males post-mating.
  • Octopamine (2 µg/mL) significantly increased male mating preference and female oviposition.
  • Mianserin treatment enhanced H. parallela survival and lifespan, without affecting egg hatchability.

Conclusions:

  • Octopamine promotes H. parallela mating and oviposition, demonstrating a low-dose effect.
  • Neural substrates' modulation of insect behavior is elucidated.
  • Findings offer insights for utilizing octopamine in managing H. parallela populations.