Study type: Medical/biological study (experimental study)

Effect of microwave and He-Ne laser on enzyme activity and biophoton emission of Isatis indigotica Fort med./bio.

Published in: J Integrat Plant Biol 2005; 47 (7): 849-855

Aim of study (acc. to author)

To assess the effect of a He-Ne laser (helium neon laser) and microwaves on the enzyme activities and biophoton emission of the plant dyer's woad Isatis indigotica seeds and seedlings.

Background/further details

Seeds and seedlings were treated with 1) laser radiation, 2) microwave irradiation or assigned to 3) a control group.



Exposure Parameters
Exposure 1: 2,450 MHz
Exposure duration: continuous for 8 s

Exposure 1

Main characteristics
Frequency 2,450 MHz
Exposure duration continuous for 8 s
Exposure setup
Exposure source
Measurand Value Type Method Mass Remarks
power density 126 mW/cm² - - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

The enzyme activities of amylase, transaminase and proteinase of the cotyledon pretreated by microwave were significantly increased compared to the control group and to the laser group. After laser and microwave pretreatment, the intensity of biophoton emission was enhanced by 74% and 99%. The intensity of biophoton emission was stronger from seedlings than from seeds.
These changes suggest that laser and microwave pretreatment can improve the inner energy of seeds, lead to an enhancement of cotyledon enzymes, and speed up the metabolism of the cell, resulting in significantly increased biophoton emission.

Study character:

Study funded by

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