RT Journal Article
SR Electronic
T1 The regulation of circadian period by phototransduction pathways in Arabidopsis
JF Science
JO Science
FD American Association for the Advancement of Science
SP 1163
OP 1166
DO 10.1126/science.7855596
VO 267
IS 5201
A1 Millar, AJ
A1 Straume, M
A1 Chory, J
A1 Chua, NH
A1 Kay, SA
YR 1995
UL http://science.sciencemag.org/content/267/5201/1163.abstract
AB 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.