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저온처리 온도와 상대습도가 2년생 인삼의 동해에 미치는 영향
서수정(Su Jeoung Suh),문지원(Ji Won Moon),권나영(Na yeong Kwon),장인복(In Bok Jang),김영창(Young Chang Kim),장인배(In bae Jang) 한국약용작물학회 2021 한국약용작물학회지 Vol.29 No.3
Background: Abrupt cold, especially frost after seedling emergence, in spring causes servere losses in ginseng yield as it is a perennial crop and has a determinate growth. Although abnormal temperature occurs more frequently, the physiological aspects of ginseng to cold stress are poorly understood. Here we report the freezing response of ginseng under artificial conditions. Methods and Results: Cold treatment at -4℃ for 16 h resulted in a 21.4% damage rate in a cold chamber, however, no damage was observed at -2℃ and -4℃ for 2, 4, 6, or 8 h. High humidity increased the damage rate to 59.9% even at the higher temperature (RH 95%, -3℃) than the ambient temperature (RH 66%, -4℃) of the cold chamber. Seedlings early in the leaf expansion were damaged more than older ones. The quantum yield (Fv/Fm) of cold-damaged seedlings was lower than the control or seedlings without visual symptoms. The root weight of a damaged seedling one month after cold treatment was 58% of control. Conclusions: Our results suggested that visual symptoms are correlated with photosynthetic ability and yield after freezing stress in ginseng. We expect our results to contribute to the further understanding of ginseng freezing stress.
서수정(Su Jeoung Suh),장인배(In Bae Jang),장인복(In Bok Jang),문지원(Ji Won Moon),유진(Jin Yu) 한국약용작물학회 2019 한국약용작물학회지 Vol.27 No.6
Background: Usually ginseng seeds are sown during autumn and spring. Sowing in spring often results in poorer seedling establishment than in autumn. One of the reasons for poor germination could be cold-treatment condition for breakage of physiological dormancy during winter. Here we tested the effects of storage temperature used during cold treatment on germination. Methods and Results: Germination properties were observed after dehiscent seeds were stored as wet and dry at 2℃, -2℃, -3.5℃ and alternating temperature (AT). Seed dryness and storage temperature affected germination properties (p < 0.01). Wet and AT condition germinated highest, and wet and -3.5℃ condition germinated lowest, which was 91.2% and 1.4% respectively. Mean germination time (MGT) of the wet and AT condition was faster than other treatments at 2.4 days, and the dry and -2℃ condition was the longest. Germination performance index (GPI) was highest for wet and AT condition (37.7%) and the lowest for wet and -3.5℃ condition (0.5%). The growth of above-ground and below-ground were the best for wet and 2℃ condition, and wet seeds showed better growth than dry seeds (p < 0.01). Conclusions: For cold treatment, ginseng seeds may not be stored below -2℃ for successful germination during spring sowing.
서수정(Su Jeoung Suh),유진(Jin Yu),장인배(In-Bae Jang),김영창(Young-Chang Kim) 한국자원식물학회 2022 한국자원식물학회지 Vol.35 No.2
Ginseng (Panax ginseng C.A. Meyer) is a perennial plant and propagates by seeds, and those need after-ripening for germination. To be ready for climate change and to ensure a stable seed supply, the technique for storing seeds in short-term and long-term in large quantities is required. In this study, dehisced ginseng seeds from two locations, batch #1 and batch #2, were stored at -3.5℃ with different moisture content, and after 3, 15, and 27 months of storage, the percentage of radicle emergence and shoot emergence were measured. After 3 months, radicle emergence and shoot emergence were normal only when the seed moisture content was more than 35%, and overall, germination was higher in batch #2 than in batch #1. After 15 months, the partially dehydrated seeds, with a moisture content between 45 to 54%, showed the highest germination rates, and most of the undried seeds were spoiled and failed to germinate. Seeds with moisture content lower than 25% had poor germination, too. The partially dehydrated seeds also succeeded in germination and growth in the soil after 15 months of storage, but deteriorated after one more 1 year, too. In summary, ginseng seeds look like have temperate recalcitrant seed characteristics, and partial dehydration allows extension of seed longevity.
침수 시간과 침수 수위가 인삼 생육 및 광합성 특성에 미치는 영향
서수정(Su Jeoung Suh),문지원(Ji Won Moon),장인복(In Bok Jang),김영창(Young Chang Kim),김동휘(Dong Hwi Kim),유진(Jin Yu) 한국약용작물학회 2021 한국약용작물학회지 Vol.29 No.6
Background: Abnormal climate change induces many environmental disasters, including flooding. Panax ginseng C. A. Meyer is highly sensitive to waterlogging, but the experimental approaches to understanding the mechanism are relatively scarce. Methods and Results: Waterlogging was applied to 2-year-old ginseng plant in July under artificial conditions for 1, 2, 3, and 5 days at two different water levels: above the soil surface [WA(+)] and below the rhizome level [WA(-)]. Growth properties and photosynthetic characteristics were measured during waterlogging, and in the recovery period after waterlogging had stopped. Shoot death was evident in ginseng plants that were treated with WA(+) for 5 days. Growth inhibition in root diameter and root weight were severe when waterlogging lasted more than 3 days, and when the water level was above the soil surface. Chlorophyll fluorescences, F<SUB>v</SUB>/F<SUB>m</SUB>, was significantly decreased during the recovery period in WA(+) for 5 days. Photosynthetic rate and stomatal conductance were influenced after waterlogging, depending on waterlogging duration and water levels. Conclusions: The degree of damage to ginseng upon waterlogging was dependent on the duration and water level. These results will be helpful to understand the waterlogging response of ginseng, and suggest that photosynthetic characteristics can be used as an indicator of damage from waterlogging.