Sinam Boynao, Sharma Shweta, Thakurdas Pooja, Joshi Dilip S
Center for Biological Rhythm Research, Ahmednagar College, Ahmednagar, 414001, MS, India.
Naturwissenschaften. 2012 Jul;99(7):575-8. doi: 10.1007/s00114-012-0928-y. Epub 2012 Jun 10.
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.
通过让果蝇处于光期昏暗（DP）为30勒克斯、光期明亮（BP）为300勒克斯的24小时明暗（LD）循环中，研究了光期明亮（BP）在果蝇双臂果蝇（Drosophila biarmipes）的明暗循环提前8小时和延迟后加速其节律重新同步化的功效。通过使用活动开始时间、活动结束时间和活动持续时间来分析重新同步化情况。在明暗循环提前或延迟后，BP组果蝇比DP组果蝇重新同步化得更快，这归因于BP增强的授时因子强度。然而，即使在BP组果蝇中，重新同步化也是一个漫长的过程，因为活动结束时间比活动开始时间经历了更多的瞬变。因此，本研究表明BP加速了双臂果蝇的重新同步化。然而，当将活动开始和结束视为节律标记时，它也揭示了重新同步化是一个漫长的过程。
