Journal
JOURNAL OF PLANT PHYSIOLOGY
Volume 171, Issue 5, Pages 99-103Publisher
ELSEVIER GMBH
DOI: 10.1016/j.jplph.2013.10.019
Keywords
Static magnetic field; High natural radioactivity; Vicia faba; Catalase; MAPK
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The effects of a static magnetic field (SMF) and high natural radioactivity (HR) on catalase and MAPK genes in Vicia faba were investigated. Soil samples with high natural radioactivity were collected from Ramsar in north Iran where the annual radiation absorbed dose from background radiation is higher than 20 mSv/year. The specific activity of the radionuclides of Th-232, Ra-236, and K-40 was measured using gamma spectrometry. The seeds were planted either in the soil with high natural radioactivity or in the control soils and were then exposed to a SMF of 30 mT for 8 days; 8 h/day. Levels of expression of catalase and MAPK genes, catalase activity and H2O2 content were evaluated. The results demonstrated significant differences in the expression of catalase and MAPK genes in SMF- and HR-treated plants compared to the controls. An increase in catalase activity was accompanied by increased expression of its gene and accumulation of H2O2. Relative expression of the MAPK gene in treated plants, however, was lower than those of the controls. The results suggest that the response of V. faba plants to SMF and HR may be mediated by modification of catalase and MAPK. (C) 2013 Elsevier GmbH. All rights reserved.
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