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Microwave irradiation affects gene expression in plants.

A Vian¹, D Roux, S Girard

¹EA 3296 ERTAC; Université Blaise Pascal; Aubiere, France.

Plant Signaling & Behavior

|June 13, 2009

Summary

Low-amplitude, 900 MHz electromagnetic fields (EMF) can trigger a significant increase in stress-related mRNA. This molecular response, observed rapidly after exposure, challenges the notion that nonionizing radiation has negligible physiological impact.

Keywords:

EMF MSRC bZIP microwave non-ionizing radiation tomato

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Area of Science:

Molecular biology
Environmental science
Biophysics

Background:

The physiological effects of nonionizing radiation are often considered minimal.
Previous research has not fully explored the molecular responses to environmental electromagnetic fields.

Purpose of the Study:

To investigate the molecular impact of controlled electromagnetic fields (EMF) on cellular stress markers.
To quantify the changes in mRNA expression in response to specific EMF parameters.

Main Methods:

Utilized a calibrated stimulation system to generate isotropic and homogeneous 900 MHz EMF.
Measured the expression levels of mRNA encoding a stress-related bZIP transcription factor.
Compared EMF-induced responses to those from mechanical stimulations.

Main Results:

Exposure to low-amplitude, short-duration 900 MHz EMF rapidly increased mRNA levels (peaking at 5-15 min).
Observed a significant 3.5-fold accumulation of the target mRNA.
The molecular response to EMF was comparable to that induced by mechanical stimuli.

Conclusions:

Nonionizing radiation, specifically 900 MHz EMF, can elicit a measurable molecular stress response.
The rapid and significant mRNA accumulation suggests a more pronounced physiological impact of EMF than previously assumed.
Cellular responses to EMF may share pathways with responses to physical stressors.