Comparison of the effect of constant light on the circadian rhythm of white-eye mutant and wild-type blow fly Protophormia terraenovae
Comparison of the effect of constant light on the circadian rhythm of white-eye mutant and wild-type blow fly Protophormia terraenovae
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DOI：
10.1080/09291016.2010.511132
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发表时间：
2011-01-01
影响因子：
1.1
通讯作者：
Shiga, Sakiko
中科院分区：
文献类型：
--
作者：
Hamasaka, Yasutaka;Watari, Yasuhiko;Shiga, Sakiko
白眼突变果蝇的复眼被认为比野生果蝇的复眼更敏感，因为前者缺乏筛选色素。研究了恒光条件对野生型和白眼突变体的昼夜节律的影响，以确定可能的光受体，这些光受体将恒定的光传递给时钟，影响自由奔跑的周期和节律性。野生型和白眼突变体在0.5lx和500lx的恒定光照条件下均表现出明显的节律性。虽然心律失常的发生率随着光强度的增加而增加，但超过一半的果蝇在500lx的光强下是有节奏的。Terraenovae似乎对光引起心律失常有很高的阈值。野生型和白眼型突变体的节律性蝇的发生率和恒光条件下自由奔跑的时间没有显著差异。这表明，在恒定光照条件下工作的光感受器是视网膜外的。
Compound eyes of white-eye mutant flies are considered to be more sensitive than those of the wild type because the former lack the screening pigment. The effects of constant light conditions on the circadian rhythm were examined in wild-type and white-eye mutant Protophormia terraenovae to identify plausible photo-receptors mediating constant light to clocks, which affect the free-running period and rhythmicity. Both the wild type and white-eye mutant showed clear rhythmicity under constant light conditions at 0.5 lx and 500 lx. Although the incidence of arrhythmia increased as light intensity increased, more than half of the flies were rhythmic at 500 lx. P. terraenovae seems to have a high threshold for light causing arrhythmia. Incidence of rhythmic flies and the free-running period under constant light conditions were not significantly different between the wild type and white-eye mutant. This suggests that photoreceptors operating under constant light conditions are extraretinal.