کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2038360 1072363 2007 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The Drosophila Circadian Network Is a Seasonal Timer
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیوشیمی، ژنتیک و زیست شناسی مولکولی (عمومی)
پیش نمایش صفحه اول مقاله
The Drosophila Circadian Network Is a Seasonal Timer
چکیده انگلیسی

SummaryPrevious work in Drosophila has defined two populations of circadian brain neurons, morning cells (M-cells) and evening cells (E-cells), both of which keep circadian time and regulate morning and evening activity, respectively. It has long been speculated that a multiple oscillator circadian network in animals underlies the behavioral and physiological pattern variability caused by seasonal fluctuations of photoperiod. We have manipulated separately the circadian photoentrainment pathway within E- and M-cells and show that E-cells process light information and function as master clocks in the presence of light. M-cells in contrast need darkness to cycle autonomously and dominate the network. The results indicate that the network switches control between these two centers as a function of photoperiod. Together with the different entraining properties of the two clock centers, the results suggest that the functional organization of the network underlies the behavioral adjustment to variations in daylength and season.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 129, Issue 1, 6 April 2007, Pages 207–219
نویسندگان
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