Abstract
The efficacy of bright photophase (BP) in accelerating the re-entrainment of Drosophila biarmipes rhythm following 8 h phase advance and delay of light–dark (LD) cycle was examined by subjecting the flies to 24 h LD cycles with dim photophase (DP) at 30 lx and BP at 300 lx. Re-entrainment was analysed by using the activity onset, activity offset and the duration of activity. Following LD advance or delay, the BP flies re-entrained faster than the DP flies which was attributed to the enhanced zeitgeber strength of BP. Nevertheless, the re-entrainment was a protracted process even in the BP flies since the activity offsets underwent more transients than the activity onsets. Thus, this study demonstrates that the BP accelerates the re-entrainment in D. biarmipes. It, however, also reveals that the re-entrainment is a prolonged process when the activity onset and offset are regarded as the rhythm markers.
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References
Burgess HJ, Crowley SJ, Gazda CJ, Fogg LF, Eastman CI (2003) Preflight adjustment to eastward travel: 3 days of advancing sleep with and without morning bright light. J Biol Rhythms 18:318–328
Frank DW, Evans JA, Gorman MR (2010) Time-dependent effects of dim light at night on re-entrainment and masking of hamster activity rhythms. J Biol Rhythms 25:103–112
Gorman MR, Evans JA, Elliot JA (2006) Potent circadian effects of dim illumination at night in hamsters. Chronobiol Int 23:245–250
Hirai K, Kita M, Ohta H, Nishikawa H, Fujiwara Y, Ohkawa S, Miyamoto M (2005) Ramelton (TAK-375) accelerates reentrainment of circadian rhythm after a phase advance of the light-dark cycle in rats. J Biol Rhythms 20:27–37
Kaur G, Thind R, Glass JD (2009) Brief constant light accelerates serotonergic re-entrainment to large shifts of the daily light/dark cycle. Neuroscience 159:1430–1440
Liu T, Borjigin J (2005) Reentrainment of the circadian pacemaker through three distinct stages. J Biol Rhythms 20:441–450
Parry BL (2002) Jet lag: minimizing it’s effects with critically timed bright light and melatonin administration. J Mol Microbiol Biotechnol 4:463–466
Reddy AB, Field MD, Maywood ES, Hasting MH (2002) Differential resynchronization of circadian clock gene expression within the suprachiasmatic nuclei of mice subjected to experimental jet lag. J Neuroscience 22:7326–7330
Sharma S, Thakurdas P, Sinam B, Joshi D (2012) Paradoxical masking effects of bright photophase and high temperature in Drosophila malerkotliana. Chronobiol Int 29:157–165
Yamazaki S, Numano R, Abe M, Hida A, Takahashi R, Ueda M, Block GD, Sakaki Y, Menaker M, Tei H (2000) Resetting central and peripheral circadian oscillators in transgenic rats. Science 288:682–685
Yoshi T, Hermann C, Helfrich-Forster C (2010) Cryptochrome-positive and -negative clock neurons in Drosophila entrain differentially to light and temperature. J Biol Rhythms 25:387–398
Acknowledgments
The study was supported by the Research Grant No. FIST SR/SO/AS-MS01/2009 funded by DST, New Delhi. The authors thank three anonymous reviewers for their constructive comments on the previous version of manuscript.
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Communicated by: Volker Loeschcke
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Sinam, B., Sharma, S., Thakurdas, P. et al. Bright photophase accelerates re-entrainment after experimental jetlag in Drosophila . Naturwissenschaften 99, 575–578 (2012). https://doi.org/10.1007/s00114-012-0928-y
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DOI: https://doi.org/10.1007/s00114-012-0928-y