Berlin 2018 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 15: Nonlinear Dynamics, Synchronization, Chaos I
DY 15.2: Vortrag
Montag, 12. März 2018, 15:45–16:00, BH-N 128
Partial synchronisation in yeast cell populations — André Weber1, Werner Zuschratter1, and •Marcus J. B. Hauser2 — 1Leibniz-Institut für Neurobiologie Magdeburg, Germany — 2Institut für Biometrie und Medizinische Informatik, Otto-von-Guericke-Universität Magdeburg, Germany
The mechanism of the transition between synchronised and desynchronised behaviour of intact yeast cells of the strain Saccharomyces carlsbergenis was investigated. In cell colonies of intermediate cell density, all cells remain oscillatory, in addition, a partially synchronised and a desynchronised state are accessible for experimental studies. In the partially synchronised state, the mean oscillatory period is shorter than that of the cells in a desynchronised state. Thus, synhronisation occurs due to entrainment to cells that oscillate more rapidly. This is typical for synchronisations due to phase advancement. However, the cells do not synchronise completely, as the distribution of the oscillatory frequencies only narrows but does not collapse to a single frequency. The desynchronisation is characterised by a broadening of the distribution of oscillation frequencies of the cells. Chimera states, i.e., the coexistence of a synchronised and a desynchronised parts of the population, could not be observed.