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

Radka Zavodska, Germund von Wowern, Christer Löfstedt, Wenqi Rosén, Ivo Sauman

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

Abstract

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.
Original languageEnglish
Title of host publicationJournal of Insect Physiology
PublisherElsevier
Pages435-440
Volume55
DOIs
Publication statusPublished - 2009
EventSymposium on Biological Clocks - From Genes to Physiology and Behavior held at the 23rd International Congress of Entomology - Durban, South Africa
Duration: 2008 Jul 62008 Jul 12

Publication series

Name
Number5
Volume55
ISSN (Print)0022-1910

Conference

ConferenceSymposium on Biological Clocks - From Genes to Physiology and Behavior held at the 23rd International Congress of Entomology
Country/TerritorySouth Africa
CityDurban
Period2008/07/062008/07/12

Subject classification (UKÄ)

  • Zoology
  • Biological Sciences

Free keywords

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

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