Original papers: The oscillatory bioelectrical signal from plants explained by a simulated electrical model and tested using Lempel-Ziv complexity

  • Authors:

  • Euvaldo F. Cabral;Paula Cristina Pecora;Aldo Ivan Céspedes Arce;Adriano R. Bruno Tech;Ernane Jose Xavier Costa

  • Affiliations:

  • Neuraltronics Research Division, São Paulo, SP, Brazil;Computational and Applied Physics Lab, FZEA, University of São Paulo, Pirassununga 13630-090, SP, Brazil;Computational and Applied Physics Lab, FZEA, University of São Paulo, Pirassununga 13630-090, SP, Brazil;Computational and Applied Physics Lab, FZEA, University of São Paulo, Pirassununga 13630-090, SP, Brazil;Computational and Applied Physics Lab, FZEA, University of São Paulo, Pirassununga 13630-090, SP, Brazil

  • Venue:
  • Computers and Electronics in Agriculture
  • Year:
  • 2011

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Abstract

This paper demonstrates the oscillatory characteristics of electrical signals acquired from two ornamental plant types (Epipremnum pinnatum and Philodendron scandens - Family Araceae), using a noninvasive acquisition system. The electrical signal was recorded using Ag/AgCl superficial electrodes inside a Faraday cage. The presence of the oscillatory electric generator was shown using a classical power spectral density. The Lempel and Ziv complexity measurement showed that the plant signal was not noise despite its nonlinear behavior. The oscillatory characteristics of the signal were explained using a simulated electrical model that establishes that for a frequency range from 5 to 15Hz, the oscillatory characteristic is higher than for other frequency ranges. All results show that non-invasive electrical plant signals can be acquired with improvement of signal-to-noise ratio using a Faraday cage, and a simple electrical model is able to explain the electrical signal being generated.