Study type: Medical/biological study (experimental study)

Microwave treatment of eight seconds protects cells of Isatis indigotica from enhanced UV-B radiation lesions med./bio.

Published in: Photochem Photobiol 2006; 82 (2): 503-507

Aim of study (acc. to author)

To determine the protective role of microwaves on the stress resistance of plants to enhanced ultraviolet B radiation.

Background/further details

Plant seeds were divided into four groups: 1) control group; 2) microwave irradiation; 3) ultraviolet B radiation; and 4) microwave exposure followed by ultraviolet B radiation (seeds were germinated and grown and when they were approximately ten days old the ultraviolet-B radiation was performed for eight days).
The experiments were replicated independently six times.



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

Exposure 1

Main characteristics
Frequency 2,450 MHz
Exposure duration continuous 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)

Microwave pretreatment of seeds enhanced ultraviolet-B stress resistance by decreasing the concentration of malondialdehyde and increasing the concentration of ascorbic acid and ultraviolet-B-absorbing compounds, increasing the enzyme activities of catalase, peroxidase and superoxide dismutase and increasing the energy accumulation of photosynthesis.
The results suggest that microwave irradiation enhances plant metabolism and results in increased ultraviolet-B stress resistance.

Study character:

Study funded by

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