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KMID : 1098420050130010011
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Korean Journal of Medicinal Crop Science
2005 Volume.13 No. 1 p.11 ~ p.16
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Growth and Morphological Charactersistics of Soybean Sprouts Treated with Leaf Extracts of Thea sinensis L. and Eucommia ulmoides Oliver
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Kang Jin-Ho
Park Cheol-Jong
Yoon Soo-Young
Jeon Seung-Ho
Her Chang-Young
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Abstract
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Soybean sprouts presoaked to leaf extracts were on sale as taking a growing concern about wellbeing foods. The study was carried out to compare the effects of culture period after presoaking tea (Thea sinensis L.) and hard rubber tree (Eucommia ulmoides Oliver) leaf extracts on lateral root formation, growth and morphological characters of the sprouts. Seeds of three cultivars, Pungsannamulkong, Sowonkong and Junjery, were imbibed for 5 hours into 10% solutions immediately before 5, 6 and 7 day cultures. The cultured sprouts were classified into 4 categories to calculate their composition rates on the base of hypocotyllengths; >7 cm (A),4 to 7 cm (B),< 4 cm (C) and not germinated (D), and their morphological characters, fresh and dry weights were measured. Rate of A was the lowest in Junjery of the three cultivars, while that of C showed reverse result compared to A. Similar results to that of A were observed between the three cultivars in sprout length including hypocotyl and root, diameters in middle and hook parts of hypocotyl, total fresh and dry weights. Regardless of tea and hard rubber tree leaf extract treatments, longer culture periods increased rate of A due to decrements of B, C and D, and also did the growth and the morphological characters mentioned above. Although longer culture periods reduced the increment of lateral roots, the latter treatment was more delayed in their formation and less in the roots per sprout than the former one. The growth and the morphological characters above were less in the latter treatment than in the former one in general, meaning that hard rubber tree leaf extract could more repress growth of soybean sprouts than tea leaf extract.
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KEYWORD
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mungbean (Vigna radiata L.) sprout, Thea sinensis L., Eucommia ulmoides Oliver, leaf extracts, growth, morphological characters
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