The Regulation of Circadian Period by Phototransduction Pathways in <i>Arabidopsis</i>
SciencePublished 24 February 1995
Andrew J. Millar, Martin Straume, Joanne Chory, Nam‐Hai Chua, Steve A. Kay
Citations280
SJR quartileQ1
SJR score10.42
SNIP6.62
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TL;DR
Transgenic Arabidopsis plants expressing a luciferase gene fused to a circadian-regulated promoter exhibited robust rhythms in bioluminescence, suggesting both phytochrome- and blue light-responsive photoreceptor pathways control the period of the circadian clock.
Abstract
Transgenic Arabidopsis plants expressing a luciferase gene fused to a circadian-regulated promoter exhibited robust rhythms in bioluminescence. The cyclic luminescence has a 24.7-hour period in white light but 30- to 36-hour periods under constant darkness. Either red or blue light shortened the period of the wild type to 25 hours. A phytochrome-deficient mutation lengthened the period in continuous red light but had little effect in continuous blue light, whereas seedlings carrying mutations that activate light-dependent pathways in darkness maintained shorter periods in constant darkness. These results suggest that both phytochrome- and blue light-responsive photoreceptor pathways control the period of the circadian clock.
Keywords
Agricultural and Biological Sciences
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