[GSM900携帯電話と基地局からの弱いマイクロ波放射へのばく露後の大豆苗の成長低下] med./bio.

To investigate the possible effects of exposure to radiofrequency electromagnetic fields (GSM or continuous wave (CW)) on soybean seedlings.

Seven experiments with different exposure protocols were performed: 1.) 2 h sham exposure + 2 h GSM exposure (electric field strength 41 V/m) 2.) 2 h sham exposure + 2 h GSM exposure (5.7 V/m), 3.) 2 h sham exposure + 2 h GSM exposure (41 V/m) + 2 h sham exposure, 4.) 2 h sham exposure + 2 h GSM exposure (5.7 V/m) + 2 h sham exposure, 5.) 5 days sham exposure + 5 days GSM exposure (0.56 V/m), 6.) 2 h sham exposure + 2 h CW exposure (41 V/m) and 7.) 2 h sham exposure + 2 h CW exposure (5.7 V/m) + 2 h sham exposure. Additional seedlings were sham exposed. The experiments 1, 3, 5, 6, and 7 were conducted twice. The fifth experiment was performed to simulate base station-like conditions, i.e. long lasting but low electric field strength.

• 植物
• seedlings of soy plants (Glycine max)

Seedlings exposed to GSM signals with an electric field strength of 41 V/m (experiments 1 and 3) showed significantly shorter epicotyls compared to sham exposed ones. No significant differences were observed between exposure to electric field strength of 5.7 V/m (experiments 2 and 4) and the sham exposure.
However, exposure of seedlings to a weak electric field strength for five days (experiment 5) resulted in significantly shorter epicotyls and hypocotyls as well as in significantly elongated roots compared to the sham exposed seedlings.
The roots of seedlings that were exposed to CW with an electric field strength of 41 V/m (experiment 6) were significantly shorter than those of the corresponding sham exposure, while in the group exposed to CW with an electric field strength of 5.7 V/m (experiment 7), the hypocotyls were significantly shortened.
The authors conclude that effects of radiofrequency electromagnetic fields on soybean seedlings depend on electric field strengths and modulation characteristics.