Mimosa pudica: Electrical and mechanical stimulation of plant movements

Alexander G. Volkov, Justin C. Foster, Talitha A. Ashby, Ronald K. Walker, Jon A. Johnson, Vladislav S. Markin

Research output: Contribution to journalArticle

76 Scopus citations

Abstract

Thigmonastic movements in the sensitive plant Mimosa pudica L., associated with fast responses to environmental stimuli, appear to be regulated through electrical and chemical signal transductions. The thigmonastic responses of M. pudica can be considered in three stages: stimulus perception, electrical signal transmission and induction of mechanical, hydrodynamical and biochemical responses. We investigated the mechanical movements of the pinnae and petioles in M. pudica induced by the electrical stimulation of a pulvinus, petiole, secondary pulvinus or pinna by a low electrical voltage and charge. The threshold value was 1.3-1.5 V of applied voltage and 2 to 10 μC of charge for the closing of the pinnules. Both voltage and electrical charge are responsible for the electro-stimulated closing of a leaf. The mechanism behind closing the leaf in M. pudica is discussed. The hydroelastic curvature mechanism closely describes the kinetics of M. pudica leaf movements.

Original languageEnglish (US)
Pages (from-to)163-173
Number of pages11
JournalPlant, Cell and Environment
Volume33
Issue number2
DOIs
StatePublished - Feb 1 2010

Keywords

  • Charged capacitor method
  • Electrical signaling
  • Motor cells
  • Plant electrophysiology

ASJC Scopus subject areas

  • Physiology
  • Plant Science

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    Volkov, A. G., Foster, J. C., Ashby, T. A., Walker, R. K., Johnson, J. A., & Markin, V. S. (2010). Mimosa pudica: Electrical and mechanical stimulation of plant movements. Plant, Cell and Environment, 33(2), 163-173. https://doi.org/10.1111/j.1365-3040.2009.02066.x