UNSPECIFIED. (2003) The TIME FOR COFFEE gene maintains the amplitude and timing of Arabidopsis circadian clocks. PLANT CELL, 15 (11). pp. 2719-2729. ISSN 1040-4651

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Abstract

Plants synchronize developmental and metabolic processes with the earth's 24-h rotation through the integration of circa-dian rhythms and responses to light. We characterize the time for coffee (tic) mutant that disrupts circadian gating, photoperiodism, and multiple circadian rhythms, with differential effects among rhythms. TIC is distinct in physiological functions and genetic map position from other rhythm mutants and their homologous loci. Detailed rhythm analysis shows that the chlorophyll a/b-binding protein gene expression rhythm requires TIC function in the mid to late subjective night, when human activity may require coffee, in contrast to the function of EARLY-FLOWERING3 (ELF3) in the late day to early night. tic mutants misexpress genes that are thought to be critical for circadian timing, consistent with our functional analysis. Thus, we identify TIC as a regulator of the clock gene circuit. In contrast to tic and elf3 single mutants, tic elf3 double mutants are completely arrhythmic. Even the robust circadian clock of plants cannot function with defects at two different phases.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry S Agriculture > SB Plant culture Q Science > QH Natural history > QH301 Biology
Journal or Publication Title:	PLANT CELL
Publisher:	AMER SOC PLANT BIOLOGISTS
ISSN:	1040-4651
Date:	November 2003
Volume:	15
Number:	11
Number of Pages:	11
Page Range:	pp. 2719-2729
Identification Number:	10.1105/tpc.013730
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/9107

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