Differential control of morning and evening components in the activity rhythm of Drosophila melanogaster -: Sex-specific differences suggest a different quality of activity
Differential control of morning and evening components in the activity rhythm of Drosophila melanogaster -: Sex-specific differences suggest a different quality of activity
复制标题
DOI：
10.1177/074873040001500208
复制
发表时间：
2000-04-01
影响因子：
3.5
通讯作者：
Helfrich-Förster, C
中科院分区：
文献类型：
--
作者：
Helfrich-Förster, C
在黑腹果蝇野生型品系CantonS、柏林和俄勒冈州（R）中比较了雄性和处女或交配雌性果蝇的运动活动节律。在光暗条件下，大多数果蝇表现出双峰活动模式，在开灯前后出现早晨高峰，在关灯前出现晚上高峰。对于所有菌株，在早晨高峰期观察到明显的性二型性。男性有一个显着早于女性的早晨高峰，因此一个较大的相位角之间的早晨和晚上的高峰（psi（米，e））。在恒定的黑暗条件下，上午的组件与晚上的组件合并到一个单峰的活动带在大约一半的苍蝇。在那些保持双峰的果蝇中，psi（m，e）的性别特异性差异消失了。其他性别特异性差异现在很明显：男性表现出比女性更短的自由运行期，在三个菌株中，女性比男性更活跃。早晨和晚上的成分似乎有助于自由运行的时间。自发或外部引起的变化psi（m，e）与周期的变化。在一些果蝇中，早晨和晚上的分量显示出分裂，表明它们是两个不同振荡器的输出。LD-1条件下，早高峰期的性二态性表明，早高峰期和晚高峰期的活动功能可能不同，例如，在早高峰期，雄性主动寻找雌性。总的来说，这些结果强调了果蝇昼夜节律系统的多振荡性质。
The rhythms of locomotor activity of male and virgin or mated female flies were compared in the Drosophila melanogaster wild-type strains CantonS, Berlin, and Oregon(R). Under light-dark conditions, most flies showed a bimodal activity pattern with a morning peak around lights-on and an evening peak before lights-off. For all strains, a distinct sexual dimorphism was observed in the phase of the morning peak. Males had a significantly earlier morning peak than females and consequently a larger phase angle between morning and evening peak (psi(m,e)). Under constant dark conditions, the morning component merged with the evening component to a unimodal activity band in about half of the flies. In those flies who maintained bimodality, the sex-specific difference in psi(m,e) disappeared. Other sex-specific differences were now apparent: Males showed a shorter free running period than females, and in two of the three strains, females were more active than males. Morning and evening components seem to contribute to the free-running period. Spontaneous or externally provoked change in psi(m,e) were correlated with period changes. In some flies, the morning and the evening components showed splitting, indicating that they are the output of two different oscillators. The sexual dimorphism in the phase of the morning peak under LD-conditions suggests that the function of activity during morning and evening peak might be different, for example, during the morning peak, males are active to find females. Overall, the results underline the multioscillatory nature of Drosophila's circadian system.