title: The release of a pheromonotropic neuropeptide, PBAN, in the turnip moth Agrotis segetum, exhibits a circadian rhythm.
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.
authors.affiliation: University of South Bohemia, Ceské Budĕjovice, Czech Republic. radkaz@pf.jcu.cz
authors.forename: Radka
authors.initials: R
authors.lastname: Závodská
authors.forename: Germund
authors.initials: G
authors.lastname: von Wowern
authors.forename: Christer
authors.initials: C
authors.lastname: Löfstedt
authors.forename: WenQi
authors.initials: W
authors.lastname: Rosén
authors.forename: Ivo
authors.initials: I
authors.lastname: Sauman
mesh_terms: D000818:Animals; D001921:Brain / Q000378:metabolism / Q000528:radiation effects; D002940:Circadian Rhythm; D005260:Female; D006458:Hemolymph / Q000378:metabolism / Q000528:radiation effects; D008027:Light; D008297:Male; D009036:Moths / Q000502:physiology* / Q000528:radiation effects; D009479:Neuropeptides / Q000096:biosynthesis*; D012724:Sex Attractants / Q000096:biosynthesis*
chemical_list: D009479:Neuropeptides; D012724:Sex Attractants; C079709:pheromone biosynthesis activating neuropeptide, Helicoverpa zea