Document Detail


Interaction of light regimes and circadian clocks modulate timing of pre-adult developmental events in Drosophila.
MedLine Citation:
PMID:  24885932     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Circadian clocks have been postulated to regulate development time in several species of insects including fruit flies Drosophila melanogaster. Previously we have reported that selection for faster pre-adult development reduces development time (by ~19 h or ~11%) and clock period (by ~0.5 h), suggesting a role of circadian clocks in the regulation of development time in D. melanogaster. We reasoned that these faster developing populations could serve as a model to examine stage-specific interaction of circadian clocks and developmental events with the environmental light/dark (LD) conditions. We assayed the duration of three pre-adult stages in the faster developing (FD) and control (BD) populations under a variety of light regimes that are known to modulate circadian clocks and pre-adult development time of Drosophila to examine the role of circadian clocks in the timing of pre-adult developmental stages.
RESULTS: We find that the duration of pre-adult stages was smaller under constant light (LL) and short period light (L)/dark (D) cycles (L:D = 10:10 h; T20) compared to the standard 24 h day (L:D = 12:12 h; T24), long LD cycles (L:D = 14:14 h; T28) and constant darkness (DD). The difference in the duration of pre-adult stages between the FD and BD populations was significantly smaller under the three LD cycles and LL compared to DD, possibly due to the fact that clocks of both FD and BD flies are driven at the same pace in the three LD regimes owing to circadian entrainment, or are rendered dysfunctional under LL.
CONCLUSIONS: These results suggest that interaction between light regimes and circadian clocks regulate the duration of pre-adult developmental stages in fruit flies D. melanogaster.
Authors:
Pankaj Yadav; Madhumohan Thandapani; Vijay Kumar Sharma
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-5-16
Journal Detail:
Title:  BMC developmental biology     Volume:  14     ISSN:  1471-213X     ISO Abbreviation:  BMC Dev. Biol.     Publication Date:  2014 May 
Date Detail:
Created Date:  2014-6-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100966973     Medline TA:  BMC Dev Biol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  19     Citation Subset:  -    
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