The ELF4 gene controls circadian rhythms and flowering time in Arabidopsis thaliana

Mark R. Doyle, Seth J. Davis, Ruth M. Bastow, Harriet G. McWatters, László Kozma-Bognár, Ferenc Nagy, Andrew J. Millar () and Richard M. Amasino ()
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Mark R. Doyle: University of Wisconsin-Madison
Seth J. Davis: University of Warwick
Ruth M. Bastow: University of Warwick
Harriet G. McWatters: University of Warwick
László Kozma-Bognár: Biological Research Center
Ferenc Nagy: Biological Research Center
Andrew J. Millar: University of Warwick
Richard M. Amasino: University of Wisconsin-Madison

Nature, 2002, vol. 419, issue 6902, 74-77

Abstract: Abstract Many plants use day length as an environmental cue to ensure proper timing of the switch from vegetative to reproductive growth. Day-length sensing involves an interaction between the relative length of day and night, and endogenous rhythms that are controlled by the plant circadian clock1. Thus, plants with defects in circadian regulation cannot properly regulate the timing of the floral transition2. Here we describe the gene EARLY FLOWERING 4 (ELF4), which is involved in photoperiod perception and circadian regulation. ELF4 promotes clock accuracy and is required for sustained rhythms in the absence of daily light/dark cycles. elf4 mutants show attenuated expression of CIRCADIAN CLOCK ASSOCIATED 1 (CCA1), a gene that is thought to function as a central oscillator component3,4. In addition, elf4 plants transiently show output rhythms with highly variable period lengths before becoming arrhythmic. Mutations in elf4 result in early flowering in non-inductive photoperiods, which is probably caused by elevated amounts of CONSTANS (CO), a gene that promotes floral induction5.

Date: 2002
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DOI: 10.1038/nature00954

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