是什么原因导致黑腹果蝇在第一和第二个羽化日的出现时间不同?

IF 0.7 4区 农林科学 Q4 ENTOMOLOGY
Yasuhiko Watari, Shin G. Goto, Yosuke Miyazaki, Izuru Kuroki, Kazuhiro Tanaka
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引用次数: 0

摘要

黑腹果蝇成虫羽化节律的一个特点是,成虫在羽化第一天和第二天的出羽时间差别很大。第一个羽化日的成虫出现时间在光照期的中间,而第二个羽化日的成虫出现时间则在光照开始后不久。我们推测,内源起搏器与光-暗(LD)周期的不完全协调是造成这种日变化的原因。由于该物种的蛹期很短,成虫的出现可能发生在第一个羽化日起搏器与外部周期完全同步之前。因此,第一个羽化日的峰值时间可能与第二个羽化日的峰值时间有很大不同。为了验证这一假设,我们使用在 24 小时内化蛹的蛹,在 30 至 15°C 的五个不同温度条件下,比较了 LD 12:12 或恒定黑暗条件下第一个和第二个峰值之间的时间差。在两种光照条件下,时间差都随着温度的降低和蛹期的延长而减小。蜕皮高峰之间的时间间隔接近 24 小时,支持了这一假设。这些结果可以用双振荡器模型来解释。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

What accounts for the difference in the emergence times of Drosophila melanogaster between the first and second eclosion days?

What accounts for the difference in the emergence times of Drosophila melanogaster between the first and second eclosion days?

One of the characteristics of the adult eclosion rhythm in Drosophila melanogaster is that adult emergence time differs greatly between the first and second eclosion days. The emergence time is in the middle of the light period on the first eclosion day, but immediately after light-on on the second day. We hypothesized that incomplete entrainment of the endogenous pacemaker to the light–dark (LD) cycle is responsible for the daily variation. Due to the very short pupal period of this species, adult emergence may occur before complete synchronization of the pacemaker with the external cycle on the first eclosion day. Therefore, the peak time on the first eclosion day may differ significantly from that on the second day. To verify this hypothesis, using pupae that had pupariated within 24 h, the time difference between the first and second peaks was compared in LD 12:12 or constant darkness at five different temperatures from 30 to 15°C. In both light regimes, the time difference decreased with decreasing temperature and extended pupal duration. The interval between the eclosion peaks approached 24 h, supporting this hypothesis. These results can be interpreted by using a two-oscillator model.

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来源期刊
Entomological Science
Entomological Science 生物-昆虫学
CiteScore
2.00
自引率
11.10%
发文量
30
审稿时长
6-12 weeks
期刊介绍: Entomological Science is the official English language journal of the Entomological Society of Japan. The Journal publishes original research papers and reviews from any entomological discipline or from directly allied field in ecology, behavioral biology, physiology, biochemistry, development, genetics, systematics, morphology, evolution and general entomology. Papers of applied entomology will be considered for publication if they significantly advance in the field of entomological science in the opinion of the Editors and Editorial Board.
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