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KMID : 1098420040120040328
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Korean Journal of Medicinal Crop Science
2004 Volume.12 No. 4 p.328 ~ p.341
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Analysis on Practicality of Seed Treatments for Medicinal Plants Published in Korean Scientific Journals
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Kang Jin-Ho
Yoon Soo-Young
Jeon Seung-Ho
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Abstract
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Presowing seed treatments used to enhance the rates of germination and afterward seedling emergence have not occasionally shown the same rate in indoor and field. The treatments considering germination mechanism and factors affecting germination must be totally included in indoor experiments so that the results drawn can be reproduced in the field. Seed germination is controlled by Phytochrome-mediated action changed with composition rates of red and far-red lights. Sunlight can penetrate soil into 6{sim}9;mm depth, which in turn means that seeds having 2{sim}3;mm in their width may receive the light if soil was covered 3 times over them. The penetrating light, moreover, turns to more far-red light than red light reverse to the sunlight. For germination tests after the artificial presowing seed treatments, therefore, seeds of smaller than 2 mm (< 2 mm), 2{sim}3;mm, and larger than 3 mm (> 3 mm) must be done with incandescent lamp (IL) having more far-red light, with IL or in darkness, and in darkness, respectively. The 96 papers published in 13 Korean scientific journals up to the end of 2003 were analysed on the basis of the above explanation. 91 species were used 147 times as experimental materials; 101 times for < 2 mm seeds, 24 times for 2{sim}3;mm seeds and 22 times for > 3 mm seeds. If they were analysed as the light sources used for germination tests, correct applications reached more and less than 60% in both 2{sim}3;mm and > 3 mm seeds but 23% in < 2 mm seeds, conclusionally meaning that when the experimental results in the scientific papers were applied into farming practices, care was taken of their application because most of medicinal plant seeds were very small.
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KEYWORD
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germination, seedling emergence, presowing treatment, drying, light quality
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