Circadian clock in photoperiodic time measurement: a test of the Bünning hypothesis.
Science
; 157(3793): 1182-5, 1967 Sep 08.
Article
em En
| MEDLINE
| ID: mdl-6038688
ABSTRACT
A technique has been developed for effectively separating the direct inductive effect of a light signal from its effect on the phase of the rhythm of sensitivity to photoperiodic induction. With this technique it has been shown that a 75-minute pulse of light per day, when appropriately positioned with respect to the circadian activity cycle of the sparrow Passer domesticus, is sufficient to produce a response normally produced only by long days. The results cannot be interpreted in terms of a requirement of an absolute amount of either darkness or light and offer strong confirmation of Bünning's hypothesis concerning the mechanism of photoperiodic time measurement.
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Base de dados:
MEDLINE
Assunto principal:
Aves
/
Ritmo Circadiano
/
Luz
Limite:
Animals
Idioma:
En
Ano de publicação:
1967
Tipo de documento:
Article