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Abstract ▼ AI-Helper

The present experiments were conducted to investigate the variability of hypocotyl elongation among the major soybean varieties by checking several conditions. The results obtained are summarized as follows. The rate of hypocotyl elongation is the highest during the day from 3.0 to 3.5 after seeding...

The present experiments were conducted to investigate the variability of hypocotyl elongation among the major soybean varieties by checking several conditions. The results obtained are summarized as follows. The rate of hypocotyl elongation is the highest during the day from 3.0 to 3.5 after seeding. It follows that it may be reasonable to evaluate the hypocotyl elongation of soybean seeds by comparison of hypocotyl length. And the tested 15 major cultivars could be classified as follow ; long ; Eunhakong, Janggyungkong and Bokwangkong, medium ; Namhekong, Dangyung-kong, Danyubkong, Milyangkong, Dugyukong, Paldalkong, Mangunjoseng, Namchunkong and Seal kong, short ; Gwanggyo, Begunkong and Jangbegkong. The hypocotyl elongation in small seed is longer than large seed. Correlation coefficients(r) for the relationships between 100 seed weight and hypocotyl elongation is -0.2506$^{**}$. As the rising temperature, the hypocotyl length is elongated, and longest at the range of 30 to 35$^{\circ}C$. The effects G $A_3$ hastened the hypocotyl elongation of soybean seed, and ABA, Kinetin and BA inhibit it, and that of those in short hypocotyl cultivars are higher than long hypocotyl cultivars. Hypocotyl length of long hypocotyl cultivars are longer than that of short hypocotyl cultivars under high temperature pre -treatment.