Journal
PLANT SCIENCE
Volume 161, Issue 1, Pages 45-53Publisher
ELSEVIER SCI IRELAND LTD
DOI: 10.1016/S0168-9452(01)00380-6
Keywords
antioxidant enzymes Cucumis; electromagnetic bioeffects; etiolated seedlings Cucumis; magnetic fields; senescence
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We exposed cucumber Cucumis sativus L. etiolated seedlings to a 50 Hz, 1-Gauss magnetic field (MF) 24 h per day for 2 weeks in the dark, starting from complete divarication of cotyledons and observed quickened growth and prolonged life of EMF-exposed seedlings compared to the controls. Since this phenomenon may be due to MF-induced delay in the senescence process which, in turn, is believed to be dependent on the potency of the seedling oxidative defense system, we assayed some related enzymes and found that the combined action of higher levels of superoxide dismutase (SOD), catalase (CAT) and glutathione reductase (GR) in MF-exposed seedlings may promote their survival and delay the appearance of signs of decay. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.
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