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KMID : 1098420160240040284
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Korean Journal of Medicinal Crop Science
2016 Volume.24 No. 4 p.284 ~ p.293
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Effects of Gibberellic Acid and Alternating Temperature on Breaking Seed Dormancy of Panax ginseng C. A. Meyer
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Lee Jung-Woo
Kim Young-Chang
Kim Jang-Uk
Jo Ick-Hyun
Kim Ki-Hong
Kim Dong-Hwi
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Abstract
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Background: Developing new ginseng cultivars is a significant time-consuming process owing to the three years of growth
required for ginseng to flower. To shorten the ginseng breeding process, it is necessary to establish rapid progression through each generation. In this study, we examined it was possible to rapidly break ginseng seed dormancy using gibberellic acid (GA3) treatment and alternating temperature.
Methods and Results: Seeds were obtained from local variety. Seeds were treated with either GA3 at a concentration of
100 ㎎/ℓ, constant temperature (?2℃ and 2℃), alternating temperature (2℃ followed by ?2℃, followed by 2℃) or a combination GA3 and temperature treatment. Following experimental treatment, seeds were sown into trays and placed in a greenhouse. Low germination rates were observed in seeds that did not receive GA3 treatment, which were similar following 2℃ and ?2℃ constant temperature treatment. Germination rates increased in proportion to GA3 and more so when combined with alternating temperature treatment. In additon, stem and leaf lengths of the resulting ginseng plants were increased following GA3 treatment, although no synergistic effect was observed with alternating temperature treatment.
Conclusions: These results suggest that a combination GA3 and alternating temperature treatment enhances ginseng seed germination, which can contribute to shortening the time required to progress through a single ginseng generation for breeding.
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KEYWORD
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Panax ginseng C. A. Meyer, Alternating Temperature, Dormancy Breaking, GA3, Seed
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