Social synchronization of circadian locomotor activity rhythm in the fruit fly Drosophila melanogaster
Social synchronization of circadian locomotor activity rhythm in the fruit fly Drosophila melanogaster
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DOI：
10.1242/jeb.057554
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发表时间：
2011-11-01
影响因子：
2.8
通讯作者：
Sharma, Vijay Kumar
中科院分区：
文献类型：
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作者：
Lone, Shahnaz Rahman;Sharma, Vijay Kumar
生物钟调节生物体的生理和行为，跨越广泛的类群。为了跟踪当地时间，这些时钟使用各种时间线索，如明暗，温度，食物供应和社会互动周期。本研究评估了社会线索在调节果蝇生物钟中的作用。使用成对的相互作用，我们首先估计每个相互作用的合作伙伴对累积的节奏行为的贡献百分比。随后，我们研究了多个人（组明智的）相互作用的影响，通过估计相位同步的不同菌株（具有不同的昼夜节律周期）保持在同质和异质群体之间的群体的节奏行为。虽然它是已知的，社会相互作用提高相互作用的个人之间的同步，我们问这样的相互作用是否能够同步的昼夜节律的高度相位去极化苍蝇。我们发现，虽然具有不同的昼夜节律周期的苍蝇菌株之间的相互作用未能产生同步，社会之间的相互作用相despersonized苍蝇增强了相互作用的个人的相位同步。与独居者相比，生活在社会群体中的个体表现出更大的相位同步性。社会同步是嗅觉介导的，因为具有受损嗅觉能力（Or83b（0））的阶段去嗅觉化的苍蝇之间的群体相互作用没有改善阶段同步。这些结果表明，社会线索同步果蝇的生物钟，相互作用的个人有类似的时钟周期。
Circadian clocks regulate the physiology and behaviour of organisms across a wide range of taxa. To keep track of local time, these clocks use a variety of time cues such as light-dark, temperature, food availability and social interaction cycles. This study assessed the role of social cues in modulating circadian clocks of the fruit fly Drosophila melanogaster. Using pair-wise interactions, we first estimated the percentage contribution of each interacting partner on the cumulative rhythmic behaviour of the pairs. Subsequently, we studied the effects of multi-individual (group-wise) interactions on the rhythmic behaviour of the group by estimating phase synchrony between individuals of different strains (having different circadian periods) maintained in both homogeneous and heterogeneous groups. Although it is known that social interactions improve synchrony between interacting individuals, we asked whether such interactions are able to synchronize the circadian rhythms of highly phase-desynchronized flies. We found that, although interactions between fly strains possessing different circadian periods failed to produce synchrony, social interactions among phase-desynchronized flies did enhance the phase synchrony of the interacting individuals. Differently phased individuals living in social groups displayed significantly greater phase synchrony than those living solitarily. Social synchronization is olfaction mediated as group-wise interactions among phase-desynchronized flies possessing compromised olfactory ability (Or83b(0)) did not improve phase synchrony. These results suggest that social cues synchronize the circadian clocks of Drosophila provided that the interacting individuals have similar clock periods.