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To study whether electromagnetic fields from cell phones inhibit growth of mung bean (Vigna radiata) through induction of stress responses.
50 seeds were exposed and 50 seeds were sham-exposed. After exposure, seeds were allowed to germinate in Petri dishes for 48 h.
|ばく露時間||continuous for 0.5 h, 1 h, 2 hr, 4 hr|
|Repetition frequency||217 Hz|
|Distance between exposed object and exposure source||8 cm|
|チャンバの詳細||26 cm x 47.5 cm x 17.5 cm closed shielded chamber acting as Faraday cage; all walls layered with 2 mm thick aluminum|
|ばく露装置の詳細||two GSM mobile phones positioned each at one end of the chamber; seeds placed between them; phones used in talk mode|
|Sham exposure||A sham exposure was conducted.|
The data showed that cell phone electromagnetic field exposure significantly inhibited the germination (at ≥2 h), and radicle and plumule growths (≥1 h) in mung bean in a time-dependent manner. Furthermore, exposure enhanced malondialdehyde content (indicating lipid peroxidation), and increased hydrogen peroxide cumulation and root oxidizability in mung bean roots (inducing oxidative stress and cellular damage). Under exposure, there was also a significant upregulation in the enzyme activities of scavenging enzymes in the roots.
The authors conclude that cell phone electromagnetic field exposure inhibit root growth of mung bean by inducing reactive oxygen species-generated oxidative stress despite increased enzyme activities of antioxidant enzymes.