Action spectra for phase shifts of a circadian rhythm in Drosophila - PubMed

Action spectra for phase shifts of a circadian rhythm in Drosophila

K D Frank et al. Science. 1969.

Abstract

Action spectra were determined for lightinduced phase shifts of the circadian rhythm of adult emergence in Drosophila pseudoobscura. The action spectra for advance and delay phase shifts are similar; the most effective wavelengths are in the blue region, with a sharp cutoff above 500 nanometers. This similarity suggests that the same photoreceptive pigment mediates both advance and delay phase shifts.

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