Figure 5
From: Collective excitations of germinating pollen grains at critical points
Different complexity measures of a collection of hyacinth pollen tubes at temperatures different from the optimum growth temperature (\(T \ne T_{c}\)) close to 20.2 °C. (a) Electromotive force (EMF) as a function of the point counter (\(N\)). [EMF can be measured as an open circuit potential difference or voltage that can drive an electric current if an external circuit is connected to the terminals]. (b) Detrended data from (a). (c) Hilbert transform. (d) Hilbert–Huang envelope. (e) Histogram of EMF. (f) Autocorrelation function and (g) Average mutual information as a function of the time delay. (h) Computing the embedding dimensions. (i) Reconstructed phase space trajectory according to Takens' theorem. Representative chart from 62 measurement series.
