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The release of a pheromonotropic neuropeptide, PBAN, in the turnip moth Agrotis segetum, exhibits a circadian rhythm

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Author

Summary, in English

In the female turnip moth, Agrotis segetum, a pheromone biosynthesis activating neuropeptide (PBAN) stimulates sex pheromone biosynthesis which exhibits a daily rhythm. Here we show data supporting a circadian rhythm in PBAN release from the corpora cardiaca, which we propose regulates the endogenous rhythm in sex pheromone biosynthesis. This conclusion is drawn as the observed daily rhythm in PBAN-like immunoreactivity, in the hemolymph is persistent in constant darkness and is phase-shifted by an advanced light:dark cycle. PBAN-like immunoreactivity was found in the brain, the optic lobe, the suboesophageal ganglion and in the retrocerebral complex. In each hemisphere ca. 10 immunopositive neurons were observed in the pars intercerebralis and a pair of stained somata in the dorso-lateral protocerebrum. A cluster of cells containing PBAN-like immunoreactive material was found in the tritocerebrum and three clusters of such cells were found in the SOG. Their processes reach the corpora cardiaca via nervi corporis cardiaci and the dorsal surface of the corpora allata via the nervi corporis allati. (C) 2008 Elsevier Ltd. All rights reserved.

Publishing year

2009

Language

English

Pages

435-440

Publication/Series

Journal of Insect Physiology

Volume

55

Issue

5

Document type

Conference paper

Publisher

Elsevier

Topic

  • Zoology
  • Biological Sciences

Keywords

  • neuropeptide (PBAN)
  • Circadian
  • Pheromone biosynthesis activating
  • rhythm
  • Agrotis segetum

Conference name

Symposium on Biological Clocks - From Genes to Physiology and Behavior held at the 23rd International Congress of Entomology

Conference date

2008-07-06 - 2008-07-12

Conference place

Durban, South Africa

Status

Published

Project

  • Evolutionary mechanisms of pheromone divergence in Lepidoptera

Research group

  • Pheromone Group

ISBN/ISSN/Other

  • ISSN: 0022-1910