研究のタイプ: 医学/生物学の研究 (experimental study)

[小麦の種子の初期発芽段階に対する低周波磁界の作用メカニズム] med./bio.

Mechanism of the action of low-frequency magnetic field on the initial stages of germination of wheat seeds.

掲載誌: Biophysics 1996; 41 (4): 931-937

麦の種が膨れている間にエストラサーゼを放出する段階での低周波磁界への短期ばく露は、活発な時期と休止時期の両方で酵素の放出が早まった。その後は磁界の影響が落ちた。磁界発芽時にpHシフトをもたらした。古い種ではエストラサーゼの最高作用は後で観察された。磁界ばく露は変化や低下をもたらさなかった。おそらく膜のバリヤー機能の回復が誘発されたからであろう。この種の発芽力と発芽率は大きく増加した。

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研究目的(著者による)

To study the effects of low frequency magnetic field exposure on the initial stages of germination of wheat seeds. As sensitive parameters to the action of a low frequency electromagnetic field, besides the biological indices (germinating power, rate of germination, etc.), the authors chose change in pH in the direct vicinity of the seed germ and change in the hydrolytic activity of the esterase enzymes released at the early stages of germination of wheat seeds.

詳細情報

In an interval between one and 30 h after the start of wetting the plant samples were exposed to the magnetic field. Different wheat varieties of different ages were used.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 30–33 Hz
ばく露時間: continuous for 7 min to 10 min

ばく露1

主たる特性
周波数 30–33 Hz
タイプ
  • magnetic field
波形
  • sinusoidal
ばく露時間 continuous for 7 min to 10 min
ばく露装置
ばく露の発生源/構造
  • MM-5 magnetic mixer
ばく露装置の詳細 petri dishes with seeds placed on the surface of the mixer
パラメータ
測定量 種別 Method Mass 備考
磁束密度 30 mT - - - -

ばく露を受けた生物:

方法 影響評価項目/測定パラメータ/方法

研究対象とした生物試料:
調査の時期:
  • ばく露後

研究の主なアウトカム(著者による)

Brief magnetic field exposure of the wheat seeds in the first hours of swelling had relatively little influence on the esterase enzyme activity. However, at the stage of growth in seeds with high germinating power, the magnetic field effect (increased enzyme activity) sharply increased by a factor of two and more in individual experiments. After 11 h, strong effects were noted in all tests and, starting from hours 17-18, the magnetic field only weakly influenced enzyme activity. At the same time, in old seeds, the magnetic field exposure either did not change or lowered esterase enzyme activity.
In some experiments the magnetic field exposure produced an earlier pH value shift close to the germ surface (acceleration of cell acidification process).
The germinating power and the rate of germination also sharply increased following magnetic field exposure.
The authors conclude that the data point out the high sensitivity of wheat seed in the course of their germination to exposure to a low frequency magnetic field.

研究の種別:

研究助成

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