この研究は、種子の発芽および植物体の生長の速度に対する低強度の交流磁界（自然の地磁気ノイズのレベル）の影響を調べた。乾燥種子およびと予め湿らせた種子の両方を用い、第3葉期の生育段階 まで観察した。ばく露パラメータは、周波数0.001〜10 Hz、ばく露時間5〜60分の連続、磁束密度0.3〜0.7 mTであった。その結果、湿潤トウモロコシ種子が電磁界ばく露に最も敏感で、影響は第3葉期まで通して観察された（発芽段階での15分間のばく露により、対照と比較して植物の生長速度が30 %増加し、対照より1.5倍早く第2葉期に達したが、ばく露時間が長くなるにつれて影響の大きさは低下した）；乾燥小麦種子では、ばく露の影響は顕著でなかった；アマランスの種子に対する電磁界ばく露の影響も、ばく露時間が長くなるにつれて低下する傾向があった（ばく露時間が20〜30分間に増加すると影響は弱まり、40〜50分間ばく露では発芽が阻害された）；湿潤小麦種子では、15分ばく露によって発芽率が低下した（対照の発芽率30 %に対し、ばく露群の乾燥種子および湿潤種子の発芽率はそれぞれ56および25 %であった）；トウモロコシおよびアマランスでは、種子の状態（乾燥または湿潤）に応じた種子発芽率への影響に有意差が見られた、と報告している。
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In this study, the authors used alternating electromagnetic fields of low intensity (at the level of natural geomagnetic noise) to investigate the effect on the rate of seed germination and plant development.
Tests were performed at a certain time of day for successive developmental stages (until third-leaf stage). Exposed were both dry and preliminary moistened seeds.
| ばく露 | パラメータ |
|---|---|
|
ばく露1:
1 mHz–10 Hz
ばく露時間:
5 - 60 min continuous
|
|
| 周波数 | 1 mHz–10 Hz |
|---|---|
| タイプ |
|
| ばく露時間 | 5 - 60 min continuous |
| ばく露の発生源／構造 |
|
|---|
| 測定量 | 値 | 種別 | Method | Mass | 備考 |
|---|---|---|---|---|---|
| 磁束密度 | 0.3 mT | minimum | - | - | 0.3 - 0.7 mT |
The dried corn seeds were the most sensitive to the electromagnetic field exposure. The stimulatory effect of the electromagnetic field was observed throughout the experiments, until the third-leaf stage. Exposure to the electromagnetic field for 15 minutes at the stage of germination led to a 30% increase in the rate of plant development compared to the control. The exposed plants entered the stage of the second leaf 1.5 times more rapidly than the control plants. As the duration of exposure increased, the stimulatory effect decreased.
The effect of exposure on dried wheat seeds was less pronounced. The stimulatory effect of the electromagnetic field was manifested most distinctly on the plants with a decreased germinating capacity. 15 minutes exposure of seeds increased their germinating capacity from 30 to 55%. However, exposure for 60 minutes suppressed germination.
The stimulatory effect of the electromagnetic field exposure on amaranth seeds also tended to decrease as the duration of exposure increased. A low germinating capacity of the control seeds (25%) increased as a result of electromagnetic field exposure to 47%. The stimulatory effect of exposure became weaker when the duration of exposure increased to 20-30 minutes. The exposure of amaranth seeds for 40-50 minutes inhibited their germination.
The rate of preliminary moistened germinated wheat seeds decreased under 15 minutes exposure. The germinating capacity of exposed dry and preliminarily moistened seeds was 56 and 25%, respectively (control seeds: 30%). Statistically significant effects of exposure on seed germination rate depending on seed state (dry or moistened) were obtained for amaranth. Similar data were found for moistened corn seeds.
The authors hypothesize that the fluctuations in the geomagnetic field parameters may change the content of hydrogen peroxide in natural water, which will affect the rate of plant growth.
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