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Title: Does The Difference In The Timing Of Eclosion Of The Fruit Fly Drosophila Melanogaster Reflect Differences In The Circadian Organization?
Authors: Sheeba, V
Nihal, Manish
Mathew, S J
Swamy, Nagamani M
Chandrashekaran, M K
Joshi, Amitabh
Sharma, Vijay Kumar
Keywords: circadian
Drosophila melanogaster
Driving Oscillation
Feedback Loops
Issue Date: 2001
Publisher: Marcel Dekker
Citation: Chronobiology International 18(4), 601-612 (2001)
Abstract: The eclosion rhythm of a laboratory population of Drosophila melanogaster was studied under 12h light, 12h dark (LD 12:12) cycles. Although most of the flies were found to eclose just after "lights on" in LD 12:12, termed within gate (WG) flies, a few flies were found to eclose nearly 10h after peak eclosion, termed outside gate (OG) flies. The circadian parameters of the clocks controlling oviposition rhythms in the WG and the OG flies were estimated to understand the cause of such differences in the timing of eclosion. The distribution of the fraction of individual flies exhibiting single, multiple, and no significant period in the WG flies was significantly different from distribution in the OG flies. Compared to the WG flies, more OG flies were found to exhibit oviposition rhythm with multiple periodicity, whereas more WG flies exhibited an oviposition rhythm with a single significant period. The fraction of flies with arrhythmic oviposition was similar in both the WG and the OG flies. Free-running period tau in constant darkness (DD) and the phase angle difference psi in LD 12:12 for the oviposition rhythm of WG and OG flies were significantly different. These results suggest that the differences in the time of eclosion between the flies eclosing within the gate and outside the gate of eclosion are probably due to differences in the circadian system controlling eclosion, which is reflected by the differences in their oviposition rhythm.
Description: Restricted Access
Other Identifiers: 0742-0528
Appears in Collections:Research Articles (V. K. Sharma)

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