Title
A subset of dorsal neurons modulates circadian behavior and light responses in Drosophila
Academic Program
Neuroscience
UMMS Affiliation
Department of Neurobiology; Emery Lab; Graduate School of Biomedical Sciences, Neuroscience Program
Publication Date
2007-03-03
Document Type
Article
Disciplines
Neuroscience and Neurobiology
Abstract
A fundamental property of circadian rhythms is their ability to persist under constant conditions. In Drosophila, the ventral Lateral Neurons (LNvs) are the pacemaker neurons driving circadian behavior under constant darkness. Wild-type flies are arrhythmic under constant illumination, but flies defective for the circadian photoreceptor CRY remain rhythmic. We found that flies overexpressing the pacemaker gene per or the morgue gene are also behaviorally rhythmic under constant light. Unexpectedly, the LNvs do not drive these rhythms: they are molecularly arrhythmic, and PDF--the neuropeptide they secrete to synchronize behavioral rhythms under constant darkness--is dispensable for rhythmicity in constant light. Molecular circadian rhythms are only found in a group of Dorsal Neurons: the DN1s. Thus, a subset of Dorsal Neurons shares with the LNvs the ability to function as pacemakers for circadian behavior, and its importance is promoted by light.
DOI of Published Version
10.1016/j.neuron.2007.01.034
Source
Neuron. 2007 Mar 1;53(5):689-701. Link to article on publisher's site
Journal/Book/Conference Title
Neuron
Related Resources
PubMed ID
17329209
Repository Citation
Murad AD, Emery-Le M, Emery P. (2007). A subset of dorsal neurons modulates circadian behavior and light responses in Drosophila. GSBS Student Publications. https://doi.org/10.1016/j.neuron.2007.01.034. Retrieved from https://escholarship.umassmed.edu/gsbs_sp/890