spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

First published online February 27, 2009
Journal of Experimental Biology 212, iii (2009)
Copyright © 2009 The Company of Biologists Limited
doi: 10.1242/jeb.030361
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Related articles in JEB
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Knight, K.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Knight, K.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

Inside JEB

CIRCADIAN AND PHOTOPERIOD CLOCKS SHARE NEURONS

Kathryn Knight

kathryn{at}biologists.com


Figure 1

The daily and seasonal rhythms of life are controlled by biological clocks. The circadian clock tells us when to sleep and wake up, and the photoperiodic clock tells many creatures how to behave in response to seasonal changes associated with changing day length. But no one knew whether components of the daily circadian system functioned in the insect's longer-term photoperiodic clock (p. 867).

Sakiko Shiga and Hideharu Numata from Osaka City University, Japan, decided to test the roles of circadian neurones in the photoperiodic clock by removing neurons that regulate the blow flies' circadian rhythms, and monitoring the blow flies' ability to become dormant in response to shorter days associated with the onset of winter.

The team found that flies lacking the circadian clock's small lateral ventral neurons were unable to distinguish between long and short days, with 48% of the insects going into diapause when the days were long (and they shouldn't have), while only 55% of the flies went into diapause when the days were short and all of them should have hunkered down.

So neurones involved in regulating daily rhythms also seem to be involved in regulating seasonal behaviours and the photoperiodic clock shares some of the circadian clock's neural elements.

References

Shiga, S. and Numata, H. (2009). Roles of PER immunoreactive neurons in circadian rhythms and photoperiodism in the blow fly, Protophormia terraenovae. J. Exp. Biol. 212,867 -877.[Abstract/Free Full Text]


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?

Related articles in JEB:

Roles of PER immunoreactive neurons in circadian rhythms and photoperiodism in the blow fly, Protophormia terraenovae
Sakiko Shiga and Hideharu Numata
JEB 2009 212: 867-877. [Abstract] [Full Text]  




This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Related articles in JEB
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Knight, K.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Knight, K.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?