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Science. 1995 Feb 24;267(5201):1161-3.

Circadian clock mutants in Arabidopsis identified by luciferase imaging.

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  • 1National Science Foundation (NSF) Center for Biological Timing, Department of Biology, University of Virginia, Charlottesville 22903.


The cycling bioluminescence of Arabidopsis plants carrying a firefly luciferase fusion construct was used to identify mutant individuals with aberrant cycling patterns. Both long- and short-period mutants were recovered. A semidominant short-period mutation, timing of CAB expression (toc1), was mapped to chromosome 5. The toc1 mutation shortens the period of two distinct circadian rhythms, the expression of chlorophyll a/b-binding protein (CAB) genes and the movements of primary leaves, although toc1 mutants do not show extensive pleiotropy for other phenotypes.

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