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| Effect of Magnetic Field on Brassica oleracea L. var. capitata L. Seed Germination and Studies on Its Mechanism |
| CUI Lu-lu，YU Hai-xia，LI Jing-fu，JIANG Jing-bin，XU Xiang-yang* |
| （College of Horticulture，Northeast Agricultural University，Harbin 150030，Heilongjiang，China） |
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Abstract Taking Brassica oleracea L. var. capitata L. seed as experimental material，the effect of magnetic field intensity，and magnetic acting time and seed soaking time before treatment on seed germination index and primary and secondary relations between all factors were studied by orthogonal test and uniform test method．Then the large scale screening of magnetic field intensity and magnetic acting time were carried out to further investigate the mechanism of using magnetic field treatment to improve seed vigor from the view points of soluble protein content，malondialdehyde content，and antioxidant enzyme activity．The results indicated that suitable magnetic field treatment could promote seed germination and improve seed vigor．Magnetic field intensity was the main factor affecting seed germination．The primary and secondary order of action time and soaking time were varied with different germination indexes. Seed germination was inhibited by too high magnetic field intensity for a long time. Soaking seed in 20 ℃ distilled water for 8 hours，1-6 minutes was appropriate treatment by 1 000-3 500 GS magnetic field．After magnetic field treatment，the soluble sugar and protein contents were increased，MDA content decreased，and enzyme activities of antioxidant system were increased，thus the seed germination effect
was improved．
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Received: 04 November 2013
Published: 09 January 2014
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