Figure 2.

(a) The time-series of the collective NADH fluorescence signal for a yeast population of cell density $\rho =0.3\%$. Partial synchronisation of intracellular oscillations occurs at 580 s $\le t\le 1080$ s. (b) Development of the relative amplitudes of oscillations of each cell, and (c) of their phases. In (b) and (c) the cells are sorted according to their phases at time $t=300$ s. (d) Evolution of the distribution of instantaneous frequencies $f_i$ of the cells, and (e) of the distribution of the phase difference $\mathrm{\Delta }{\varphi }_i$ between the phase ${\varphi }_i$ of each individual cell to that of the average phase $\mathrm{\Phi }$ of all cells of the population. (f) Time dependence of the order parameter R. The field of view had a size of $85\times 85$ $\mu$m${}^2$ and hosted 251 cells. Glucose was added to the cell suspension at $t=-210$ s.