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Electrical Resistive Spiking of Fungi

    We study long-term electrical resistance dynamics in mycelium and fruit bodies of oyster fungi P. ostreatus. A nearly homogeneous sheet of mycelium on the surface of a growth substrate exhibits trains of resistance spikes. The average width of spikes is c. 23min and the average amplitude is c. 1kΩ. The distance between neighboring spikes in a train of spikes is c. 30min. Typically, there are 4–6 spikes in a train of spikes. Two types of electrical resistance spikes trains are found in fruit bodies: low frequency and high amplitude (28min spike width, 1.6kΩ amplitude, 57min distance between spikes) and high frequency and low amplitude (10min width, 0.6kΩ amplitude, 44min distance between spikes). The findings could be applied in monitoring of physiological states of fungi and future development of living electronic devices and sensors.


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