A robust two-gene oscillator at the core of Ostreococcus tauri circadian clock

Details A robust two-gene oscillator at the core of Ostreococcus tauri circadian clock A robust two-gene oscillator at the core of Ostreococcus tauri circadian clock

2010-12-09

arxiv.org/abs/1012.2090v1

Chaos 20, 4 (2010) 045108

Biology

Quantitative Biology

Quantitative Methods

13 pages

Scientific paper

10.1063/1.3530118

The microscopic green alga Ostreococcus tauri is rapidly emerging as a promising model organism in the green lineage. In particular, recent results by Corellou et al. [Plant Cell, 21, 3436 (2009)] and Thommen et al. [PLoS Comput. Biol. 6, e1000990 (2010)] strongly suggest that its circadian clock is a simplified version of Arabidopsis thaliana clock, and that it is architectured so as to be robust to natural daylight fluctuations. In this work, we analyze time series data from luminescent reporters for the two central clock genes TOC1 and CCA1 and correlate them with microarray data previously analyzed. Our mathematical analysis strongly supports both the existence of a simple two-gene oscillator at the core of Ostreococcus tauri clock and the fact that its dynamics is not affected by light in normal entrainment conditions, a signature of its robustness.

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