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From a Repressilator-Based Circadian Clock Mechanism to an External Coincidence Model Responsible for Photoperiod and Temperature Control of Plant Architecture inArabodopsis thaliana
How a plant's internal clock controls growth by sensing day length and temperature in Arabidopsis thaliana
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Abstract
Circadian clocks regulate physiological and morphological growth in plants through specific timing mechanisms.
- Endogenous circadian rhythms help organisms anticipate daily cycles of light and darkness.
- External cues like light and temperature synchronize these rhythms, enhancing plant fitness and growth.
- Central oscillators in Arabidopsis thaliana consist of three classes of transcriptional repressors that interact in a repressilator structure.
- The output from the circadian clock directly regulates the transcription of downstream genes.
- Plant growth is activated at specific times of day based on photoperiod and temperature conditions.
- Interactions between the circadian clock, light, and phytohormone signaling coordinate plant growth with environmental changes.
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