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European Biophysics Journal

, Volume 29, Issue 7, pp 515–522 | Cite as

Magnetic detection of injury-induced ionic currents in bean plants

  • V. Jazbinsek
  • G. Thiel
  • W. Müller
  • G. Wübbeler
  • Z. Trontelj
Article

Abstract

A superconducting quantum interference device (SQUID) multichannel magnetometer was used to measure the temporal and spatial evolution of the magnetic field accompanying stimulation by burning and/or cutting of Vicia faba plants. These magnetic fields are caused by ionic currents that appear after injury in different parts of the plant. All measured V. faba plants responded to the burning stimulation with detectable quasi-d.c. magnetic signals. In order to measure these signals, a suitable modulation had to be used. The covariance method was applied to analyse the measured data. The results demonstrate a dipolar-like magnetic signal, exponentially decreasing in time, above the cutting type of injury. After the burning stimulation, the magnetically detected activity was concentrated predominantly above the leaves/petioles and less above the stem. Possible mechanisms for this behaviour are suggested. A comparison with previously known electrical measurements of plant injury is given.

Plant injury/stimulation Induced current/magnetic field SQUID magnetometer Injury-induced signal propagation Post-injury distribution of electrical activity 

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Copyright information

© Springer-Verlag 2000

Authors and Affiliations

  • V. Jazbinsek
    • 1
  • G. Thiel
    • 2
  • W. Müller
    • 3
  • G. Wübbeler
    • 3
  • Z. Trontelj
    • 1
  1. 1.Physics Department IMFM, University of Ljubljana, 1000 LjubljanaSlovenia
  2. 2.Pflanzenphysiologisches Institut, Universität Göttingen, GöttingenGermany
  3. 3.Physikalisch-Technische Bundesanstalt Berlin, BerlinGermany

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