Dynamics of a <i>S. carlsbergensis</i> population of very low density (

<p><b> = 0.001%).</b> At  = 0 an aliquot of 52 mM glucose was added to the starved and immobilised cells. While the collective signal (black line) is quiescent and noisy, long-lasting oscillations are observed in the fluorescence signal emitted by an individual cell (gray line). The original time series were smoothed by adjacent averaging over three consecutive data points.</p>