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초록·키워드
Background : Considerable time and effort is required to develop new Panax ginseng varieties. Ginseng breeders have been developing techniques to shorten the breeding cycle to resolve this problem. In this study, we investigated the effects of adding GA₃ and alternating temperature (AT, 2℃→ −2℃ → 2℃) on breaking bud dormancy in the varieties (Chungsun and Sunun) of ginseng root.
Methods and Results : The GA₃ soaking treatment and AT were applied to one year old roots, which greatly accelerated the emergence of new buds. In one year old roots, new buds emerged from the 4th day post transplanting and after breaking dormancy with GA₃ and AT treatments. The emergence of new buds was completed within two weeks. The rate of bud emergence for Chungsun was 60% - 98% over 15 - 60 days after the AT and GA₃ treatments. The emergence rate of Sunun was 46% - 92%. Normal growth of the ginseng seedling was observed in spite of the early breaking of bud dormancy by combined GA₃ and AT treatments.
Conclusions : GA₃ and AT treatments shortened the dormancy period and facilitated the stable emergence of ginseng seedlings.
However, some plants suffered deformities and early sprouting owing to the combined GA₃ and AT treatments. Early sprouting was free from dormancy after leaf fall from the of aerial part of the plant.
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UCI(KEPA) : I410-ECN-0101-2019-480-000586631
