Abstract
In the present study, we investigated whether the length of light/dark cycle could influence the pre-adult developmental time and adult life span in Drosophila melanogaster. Flies were reared to adulthood and maintained as adults under both 24-h (light/dark 12:12 h) and 48-h (light/dark 24:24 h) cycles. The flies reared during pre-adult stages at the 48-h light/dark cycle had significantly prolonged developmental time compared to those in flies reared at normal 24-h cycle. Irrespective of the duration of pre-adult light/dark period, the males maintained as adults at prolonged 48-h cycle had a 13–16% longer mean adult life span than those maintained at normal 24-h cycle (P < 0.001 in all cases). In females reared under normal 24-h cycle such differences were lower but also significant (P = 0.03); no significant difference in life span was found in females reared under prolonged 48-h cycle. The results are interpreted to demonstrate that pre-adult developmental time and adult life span in Drosophila melanogaster are both influenced by the length of light/dark cycle.
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Abbreviations
- LD:
-
Light/dark
References
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Acknowledgments
The authors would like to thank Drs B. Vladimirsky, A. Olovnikov and A. Krementsova for critically reading the manuscript, and I. Polyakova and L. Mechova for excellent technical assistance.
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Vaiserman, A.M., Pisaruck, A.V., Timchenko, A.N. et al. Life extension in Drosophila maintained under lengthened light/dark regime. Biogerontology 9, 345–350 (2008). https://doi.org/10.1007/s10522-008-9146-6
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DOI: https://doi.org/10.1007/s10522-008-9146-6