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Endogenous control of circadian rhythms of pheromone production in the turnip moth, Agrotis segetum.

Rosén, Wenqi LU (2002) In Archives of Insect Biochemistry and Physiology 50(1). p.21-30
Abstract
The circadian variation of pheromone production in the turnip moth, Agrotis segetum, was characterized by quantifying (Z)-7-dodecenyl acetate (Z7-12:OAc), the most abundant pheromone component produced by female turnip moth, at different times of day. Under 17:7 h light-dark cycle (LD), the peak of Z7-12:OAc production occurred around 4 h into the scotophase, while there was very little pheromone production during the photophase. When females were maintained under constant darkness (DD), the periodicity of pheromone production was sustained for 3 consecutive days. Furthermore, the rhythm in pheromone production could be entrained to a shifted LD. These results demonstrate that the pheromone production in the turnip moth is regulated... (More)
The circadian variation of pheromone production in the turnip moth, Agrotis segetum, was characterized by quantifying (Z)-7-dodecenyl acetate (Z7-12:OAc), the most abundant pheromone component produced by female turnip moth, at different times of day. Under 17:7 h light-dark cycle (LD), the peak of Z7-12:OAc production occurred around 4 h into the scotophase, while there was very little pheromone production during the photophase. When females were maintained under constant darkness (DD), the periodicity of pheromone production was sustained for 3 consecutive days. Furthermore, the rhythm in pheromone production could be entrained to a shifted LD. These results demonstrate that the pheromone production in the turnip moth is regulated endogenously by a circadian clock. To understand how the circadian rhythm of pheromone production is generated, circadian variation of pheromone- biosynthesis-activating neuropeptide (PBAN)-like activity in the brain-suboesophageal ganglion complexes (Br-SOG), hemolymph, and ventral nerve cord (VNC) was also examined. Under both LD and DD, only the VNC displayed a circadian variation in the PBAN-like activity, which was significantly higher during the late-photophase than that in the scotophase. In addition, the present study showed that removal of VNC in isolated abdomen did not affect PBAN stimulation of pheromone production, while severing the VNC impaired normal pheromone production. The role of Br-SOG, VNC, and hemolymph in the regulation of the periodicity of pheromone production is discussed. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Acetates, Animal, Circadian Rhythm : physiology, Female, Light, Male, Neuropeptides : analysis, Moths : metabolism, Neuropeptides : biosynthesis, Sex Attractants : biosynthesis, Pheromones : biosynthesis
in
Archives of Insect Biochemistry and Physiology
volume
50
issue
1
pages
21 - 30
publisher
John Wiley & Sons
external identifiers
  • wos:000175172200003
  • scopus:0036582272
ISSN
1520-6327
DOI
10.1002/arch.10026
language
English
LU publication?
yes
id
767867a8-acf4-4486-99a3-c42946ca9417 (old id 108396)
date added to LUP
2007-06-27 12:07:48
date last changed
2017-08-27 04:15:42
@article{767867a8-acf4-4486-99a3-c42946ca9417,
  abstract     = {The circadian variation of pheromone production in the turnip moth, Agrotis segetum, was characterized by quantifying (Z)-7-dodecenyl acetate (Z7-12:OAc), the most abundant pheromone component produced by female turnip moth, at different times of day. Under 17:7 h light-dark cycle (LD), the peak of Z7-12:OAc production occurred around 4 h into the scotophase, while there was very little pheromone production during the photophase. When females were maintained under constant darkness (DD), the periodicity of pheromone production was sustained for 3 consecutive days. Furthermore, the rhythm in pheromone production could be entrained to a shifted LD. These results demonstrate that the pheromone production in the turnip moth is regulated endogenously by a circadian clock. To understand how the circadian rhythm of pheromone production is generated, circadian variation of pheromone- biosynthesis-activating neuropeptide (PBAN)-like activity in the brain-suboesophageal ganglion complexes (Br-SOG), hemolymph, and ventral nerve cord (VNC) was also examined. Under both LD and DD, only the VNC displayed a circadian variation in the PBAN-like activity, which was significantly higher during the late-photophase than that in the scotophase. In addition, the present study showed that removal of VNC in isolated abdomen did not affect PBAN stimulation of pheromone production, while severing the VNC impaired normal pheromone production. The role of Br-SOG, VNC, and hemolymph in the regulation of the periodicity of pheromone production is discussed.},
  author       = {Rosén, Wenqi},
  issn         = {1520-6327},
  keyword      = {Acetates,Animal,Circadian Rhythm : physiology,Female,Light,Male,Neuropeptides : analysis,Moths : metabolism,Neuropeptides : biosynthesis,Sex Attractants : biosynthesis,Pheromones : biosynthesis},
  language     = {eng},
  number       = {1},
  pages        = {21--30},
  publisher    = {John Wiley & Sons},
  series       = {Archives of Insect Biochemistry and Physiology},
  title        = {Endogenous control of circadian rhythms of pheromone production in the turnip moth, Agrotis segetum.},
  url          = {http://dx.doi.org/10.1002/arch.10026},
  volume       = {50},
  year         = {2002},
}