期刊
JOURNAL OF PLANT PHYSIOLOGY
卷 167, 期 2, 页码 149-156出版社
ELSEVIER GMBH
DOI: 10.1016/j.jplph.2009.08.011
关键词
Electrical conductivity; Germination; Helianthus annuus; Magnetic field; Sunflower
资金
- PG school, IARI
Seeds of sunflower (Helianthus annuus) were exposed in batches to static magnetic fields of strength from 0 to 250 mT in steps of 50 mT for 1-4 h in steps of 1 h. Treatment of sunflower seeds in these magnetic fields increased the speed of germination, seedling length and seedling dry weight under laboratory germination tests. Of the various treatments, 50 and 200 mT for 2 h yielded the peak performance. Exposure of seeds to magnetic fields improved seed coat membrane integrity and reduced the cellular leakage and electrical conductivity. Treated seeds planted in soil resulted in statistically higher seedling dry weight, root length, root surface area and root volume in 1-month-old seedlings. In germinating seeds, enzyme activities of alpha-amylase, dehydrogenase and protease were significantly higher in treated seeds in contrast to controls. The higher enzyme activity in magnetic-field-treated sunflower seeds could be triggering the fast germination and early vigor of seedlings. (C) 2009 Elsevier GmbH. All rights reserved.
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