Effects of light-dark cycles on the circadian conidiation rhythm inNeurospora crassa |
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Authors: | Bing Chang Hideaki Nakashima |
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Affiliation: | (1) Department of Biology, Faculty of Science, Okayama University, 700 Okayama, Japan |
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Abstract: | The effects of 24 hr light-dark cycles on the circadian conidiation rhythm inNeurospora crassa were compared among will-typefrq + and clock mutantsfrq +,frq 3,frq 7,frq 9 andfrq 11. The minimum length of the light period necessary for complete entrainment to the light-dark cycles was almost 2 hr infrq +,frq 3 andfrq 7 strains. The minimum duration of the dark period necessary for the appearance of circadian conidiation was almost 4 hr in all of the strains except thefrq 11 strain. The phase of the conidiation rhythm was dependent on the light to dark transition in thefrq 1 strain in all light-dark cycles examined and in thefrq + andfrq 3 strains when the light period was shorter than 16 hr. In contrast, the phase of thefrq 7 strain was dependent on the light to dark transition when the light period was shorter than 10 hr. |
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Keywords: | Circadian rhythm Conidiation Light-dark cycle Neurospora |
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