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

[低強度105 GHz電磁放射に対する植物の感受性] med./bio.

Plant sensitivity to low intensity 105 GHz electromagnetic radiation

著者: Tafforeau M, Verdus MC, Norris V, White GJ, Cole M, Demarty M, Thellier M, Ripoll C
掲載誌: Bioelectromagnetics 2004; 25 (6): 403-407
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この研究は、GSM携帯電話からの放射がアマ（亜麻：学名Linum usitatissimum L.）の実生に及ぼす影響を調べた。この実生にさまざまな弱い環境ストレスを与え、その後2日間のカルシウム欠乏を与えると、胚軸（根と子葉の間の茎の部分）に表皮分裂組織の形成を引き起こす。このような分裂組織の形成は、機械的刺激および寒冷ショックの場合、1か月後に10〜20個の形成でプラトーに達する。今回の研究では、携帯電話電磁界放射の場合、分裂組織の形成を引き起こし、それは約6個でプラトーに達した。今回の実験では、Gunn発振器を用いて、非熱レベルの105 GHzを放射させた。この2時間ばく露1回で、弱い環境刺激によって誘導されるものと同様の動態論で分裂組織の形成が誘導されることが示された、と報告している。

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研究目的（著者による）

To study the effects of electromagnetic irradiation in the 100 GHz range on plants.

詳細情報

A sensitive experimental system was used: week-old seedlings of flax are subjected to a temporary calcium deprivation. This results in the production of epidermal meristems (meristems are small groups of actively dividing cells) in the hypocotyls (part of the stem between the root and the first leaves), typically 10-20 meristems after a month, provided the seedlings have previously undergone an exposure to different stresses or stimuli (such as drought or cold shock). In control experiments designed to minimize these stresses, the mean number of meristems produced per plant is 0 or 1 after subjecting seedling to calcium deprivation. Recently, the authors have shown that irradiation from a global system for mobile communication (GSM) telephone also triggers production of meristems with a plateau of around six meristems.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 105 GHz
ばく露時間: continuous for 2 h

ばく露1

主たる特性
周波数 105 GHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 2 h
ばく露装置
ばく露の発生源／構造
Distance between exposed object and exposure source 25 cm
ばく露装置の詳細 Seedling irradiation was carried out using a 50 mW Gunn oscillator mounted 25 cm above them. The output angle of the beam was 12°, leading to an estimated mean power density of the order of 10 W/m² at the base of the hypocotyls.
Additional information Seedlings were exposed to radiation on day 6, followed by calcium deprivation during days 7 and 8. The following controls were performed: (1) irradiation without the calcium deprivation step, (2) no irradiation but inclusion of the calcium deprivation step, and (3) no irradiation and no calcium deprivation. All culture boxes (control and experimental) were placed in the same culture room. For irradiation the corresponding boxes were carefully carried to another culture room and taken back again.
パラメータ
測定量 値 種別 Method Mass 備考
電力密度 10 W/m² mean 推定値 - -
測定および計算の詳細

The output power was monitored using a Golay cell millimeter wave detector with a detection area of 1.22 cm². The power distribution across the area occupied by the sample was measured using the Golay detector and found to vary by less that ±25% from the center to the periphery of the irradiated area with no other hot spots discernable. The absolute power level incident at the sample was calibrated against an absolute power meter (having an accuracy of ±10%) placed at 25 cm from the end of the Gunn oscillator feed horn.

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）

A single 2 h exposure at 105 GHz at non-thermal levels induces meristem production with kinetics similar to that induced by weak environmental stimuli and irradiation from GSM telephone: seedlings produced an average of 7 meristems 3 weeks after the end of the calcium deprivation.

研究の種別:

研究助成

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