Study type: Medical/biological study (experimental study)

The influence of an electric field on the growth of soy seedlings. med./bio.

Published in: J Electrost 2008; 66 (7-8): 417-420

Aim of study (acc. to author)

To examine the effect of electric fields on the growth of soy seedlings.

Background/further details

Four groups were examined (23 seedlings per group): 1.) control group, 2.) exposure to a static electric field (3600 V/m), 3.) exposure to a 50 Hz electric field (1800 V/m) and 4.) exposure to a 50 Hz electric field (3600 V/m).
The experiments were repeated 4 to 6 times in different times of the year to take into account seasonal trends.

Endpoint

Exposure

Exposure Parameters
Exposure 1:
Exposure duration: continuous for 6 days
Exposure 2: 50 Hz
Exposure duration: continuous for 6 days

Exposure 1

Main characteristics
Frequency
Type
Exposure duration continuous for 6 days
Exposure setup
Exposure source
  • two 10 cm x 27 cm copper plates
Setup each seed placed in a 1 cm x 1cm x 20 cm cell of a 1 cm x 25 cm x 20 cm multi-cell polycarbonate panel, closed on the bottom with filter paper; panel placed inside an aluminum Faraday cage with a 10 cm x 27 cm copper plate at the top and the bottom of the panel with a distance of 28 cm between them; copper plates connected to a power suppy; two Faraday cages put inside a constant-climate chamber with 25 +/- 0.5° C and a relative humidity of 60 +/- 5 %
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
electric field strength 3,600 V/m - - - -

Exposure 2

Main characteristics
Frequency 50 Hz
Type
Waveform
Exposure duration continuous for 6 days
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
electric field strength 1,800 V/m peak-to-peak value - - -
electric field strength 3,600 V/m peak-to-peak value - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure
  • after exposure

Main outcome of study (acc. to author)

The static field did not have a statistical significant influence on the length of the seedlings compared to the control group. However, the seedlings exposed to the 50 Hz electric field (1800 V/m and 3600 V/m) showed a significantly increased length, starting from the 4th day in comparison to the control group.
The results suggest the possibility to influence plant growth by using extremely low frequency electric fields.

Study character:

Study funded by

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