2019
DOI: 10.1371/journal.pbio.3000407
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Abstract: Individual plant cells have a genetic circuit, the circadian clock, that times key processes to the day-night cycle. These clocks are aligned to the day-night cycle by multiple environmental signals that vary across the plant. How does the plant integrate clock rhythms, both within and between organs, to ensure coordinated timing? To address this question, we examined the clock at the sub-tissue level across Arabidopsis thaliana seedlings under multiple environmental conditions and genetic backgrounds. Our res… Show more

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Cited by 38 publications
(36 citation statements)
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“…This model has been widely applied in science and engineering to describe coupled oscillator systems including circadian oscillators 12 , 13 . We assume that the cellular interactions are weak and can be ignored 4 , 8 , 14 , then we take only the first-order Fourier component: z ( ϕ j ) = sin( ϕ j − α ), parameterized by and α . By numerical calculation, the SR (Θ′, R ′) associated with and α can be computed in advance.…”
Section: Resultsmentioning
confidence: 99%
“…This model has been widely applied in science and engineering to describe coupled oscillator systems including circadian oscillators 12 , 13 . We assume that the cellular interactions are weak and can be ignored 4 , 8 , 14 , then we take only the first-order Fourier component: z ( ϕ j ) = sin( ϕ j − α ), parameterized by and α . By numerical calculation, the SR (Θ′, R ′) associated with and α can be computed in advance.…”
Section: Resultsmentioning
confidence: 99%
“…Sectioning seedlings at the hypocotyl junction and root tip does not substantially affect either the phase of the rhythms, period differences between tissues or the spatial gene expression waves, suggesting that rhythms are autonomous and the spatial waves that travel between them are not dependent on long-distance signals [160]. Further mathematical modeling together with the experimental results showed that the spatial waves are driven by the period differences between organs and local coupling [160]. By manipulation of environmental inputs, either via light or photosynthetic sugar, Greenwood et al were able to modulate the waves in a predictable manner by locally altering clock periods.…”
Section: Tissue-specific Clocks and Intercellular/interorgan Couplingmentioning
confidence: 99%
“…Using time-lapse imaging, two spatial waves of clock gene expression were observed in roots, one up from root tip and the other one down from hypocotyl junction, suggesting that the Arabidopsis clock has multiple coordination points [154], and a less hierarchical clock structure than that suggested from grafting experiments. Furthermore, rhythm analyses across entire seedlings demonstrated period and phase differences between organs, as the cotyledons and hypocotyl exhibited shorter periods and an earlier peak than the root, but oscillations in the root tip ran faster than the middle region of the root [160] (Figure 2). These observations are also qualitatively similar to the periods and phases previously observed in isolated organs [153,155,157], suggesting intra-organ heterogeneity in clock function.…”
Section: Tissue-specific Clocks and Intercellular/interorgan Couplingmentioning
confidence: 99%
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