[Activity of the octanol dehydrogenase, of the alcool dehydrogenase and aldehyde dehydrogenase on the farnesol metabolism. Photoperiodic and neurhormonale regulation, controlling the metabolism of the juvenile hormone, in Pieris brassicae (author's transl)].
The antagonistic photoperiodic behaviour of the farnesol dehydrogenases indicates that the photonic control mechanism of the brain acts on the farnesol derivates. This cerebral control is double. The first system, linked at the allatotrope function is proportionnal at the photoperiod and acts on the octanol dehydrogenase 0,32. The second system controle the deshydrogenases ADH bands 0,50--0,58, is linked at the darkness. It is linked also at the neurocerebral activity then it stops its activity at the 4th day of the 5th stage. This last seems to be the determinating control for the establishment of the diapause since in short photoperiod, when the inhibition by this system ends, the alcool dehydrogenases 0,50-0,58 series is suractivated in rate with the lasting of the scotophase. In darkness, the 1st system functionnes cyclically and has a maximum synchron with the single maximum of the 2nd system. Inversally, in continuous light, the 2nd system is synchronisated with the 1st which has a prolongated action, maybe linked with a prolongated activity of the neurosecretory cells of the pars intercerebralis and corpora allata.
D000818:Animals; D001921:Brain / Q000378:metabolism*; D003335:Corpora Allata / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D005204:Farnesol / Q000378:metabolism*; D007313:Insecta / Q000378:metabolism*; D007605:Juvenile Hormones / Q000378:metabolism*; D008027:Light; D009758:Nymph / Q000378:metabolism; D010088:Oxidoreductases / Q000378:metabolism / Q000502:physiology*; D010775:Photic Stimulation; D013997:Time Factors
D007605:Juvenile Hormones; D005204:Farnesol; D010088:Oxidoreductases
Activité de l'octanol déshydroénase, de l'alcool et de l'aldéhyde déshydrogénase sur le métabolisme du farnésol.