• 한국약용작물학회지
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• 제21권2호
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• pp.142-147
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• 2013

Gastrodia elata has been cultivated as an important medicinal resources to treat various human diseases. One of the major problems associated with its field production is the degeneration of seed tubers, which is mainly caused by soil-borne pathogens. This study was conducted to produce disease-free seed tubers by the development of in vitro micropropagation method. First, tubers of G. elata were treated with $HgCl_2$ prior to culturing in vitro. Among various culture medium tested, water agar (WA) and WPM medium were the most effective on the induction and growth of vegetative stems. NAA ($0.1mg/{\ell}$) or TDZ ($1.0mg/{\ell}$) in WA medium showed better growth of vegetative stems compared to other plant hormones. Finally the induction and growth of vegetative stems were better in the dark compared to the light condition. In this study, we established an in vitro micropropagation system of G. elata, which might be an efficient way to increase the yield and quality of G. elata tubers in the field production.

• 한국전자통신학회논문지
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• 제16권3호
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• pp.493-502
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• 2021

외부 환경변화에 적응하여 MPP를 추적할 수 있는 포복경 영양 번식(VPR; Vegetative Propagation by Runner) 최적화 알고리즘 기반 MPPT 알고리즘을 제시하였다. VPR 알고리즘은 영양기관을 기반으로 군집 이동 번식하는 식물 생태를 모방한 알고리즘으로 식물의 노화 및 부근(Rhizome)에 대한 주변탐색 절차를 수행하여 최적점 인근의 주변을 지속적으로 탐색할 수 있다. 따라서 VPR 기반 MPPT 알고리즘의 경우, MPPT 알고리즘이 수행되는 시점에 발생하는 외부 환경변화에 적응하여 최적점을 탐색할 수 있다. 본 논문에서는 다수의 모의실험을 통해 VPR 기반 MPPT 알고리즘의 성능을 분석하였다. 더불어 PSO(Particle Swarm Optimization) 기반 MPPT 알고리즘과 동일한 환경에서 성능 비교를 통해 성능의 우수성을 비교하였다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2022년도 추계학술대회
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• pp.51-51
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• 2022

Water dropwort (Oenanthe stolonifera DC.) is a perennial herbaceous plant that grows wild throughout Korea. As of 2020, 24,819 tons (51.7% of open field, 48.3% of facility) are produced in 1,278 ha (59.9% of open field, 40.1% of facility) nationwide. Water dropwort, which is rich in nutrients such as vitamins and iron, is mainly cultivated by vegetative propagation method using local traditional species, however, seed propagation and breeding of cultivars are insufficient so far. Since securing, propagating and continuous characterization of various genetic resources are required to breed new cultivars, this study was conducted to compare the main characteristics of domestic genetic resources and to improve their utilization. Growth characteristics such as plant height, fresh weight, plant type, and flowering date were investigated for the 89 varieties of genetic resources owned by Jeollabuk-do Agricultural Research and Extension Services after vegetative propagation in the individual pots. Also, the morphological image information of leaves and flowers was constructed. Genetic resources were collected nationwide and originated in 30 regions including Hwaseong, Siheung and Jeju. Their plant types could be classified into straight, intermediate and creeping types according to their morphological characteristics, and at this time, the number of intermediate types accounted for the largest proportion. Flowering was carried out under high-temperature and long-day conditions in summer. According to the flowering date, they could be classified into early, middle and late flowering varieties, and at this time, the middle flowering varieties occupied the largest proportion. As a result of the investigation of vegetative growth characteristics, varieties with long plant height, heavy fresh weight and thick stem thickness were identified. Along with this result, it is thought that classification and selection of genetic resources for various purposes will be possible through additional investigations such as analysis of components and antioxidant activity. Moreover, it is judged that such results can be used as basic data for breeding new water dropwort cultivars in the future.

• 아시안잔디학회지
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• 제16권2호
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• pp.75-83
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• 2002

The back-filled soil of the New Incheon International Airport construction site was reclaimed with sea sand in near the Young-Jong island. The primary study was carried out from August 1993 to June 1997 to study soil amendment and to select salt resistance turfgrass species. This study dealt with low maintenance area that included most part of open space of airport site. The second experiment, from October 1996 to August 1998, focused on soil amendment and selection of turfgrass species for alongside runway where turf area was maintained. Through two previous studies, propagation methods with zoysiagrass were tested for alongside runway and surrounding areas at 1998. The study of construction methods with zoysiagrass, vegetative propagation showed better results on visual quality and cover rating compare with seeding propagation. However, significant different between vegetative and seeding propagation was not showed on visual quality and drought tolerance after one year of plot establishment. The cover rating by seeding construction methods reached in excess of 70% of limitation suggested by the Incheon International Airport Cooperation. Zoysia net and sprigging net methods were the most suitable where there requires rapid and high rate of ground cover. Seeding propagation should be acceptable to obtain a resonable cover rating where there allows relatively longer period of completion. Therefore, it should be possible to attain a proper rating of ground cover on the site of open space, alongside runway or areas similar to the New Incheon International Airport which is being built on dredged seashore sand. However, the methods of soil amendment, selecting salt tolerance species, and proper construction procedure should be considered at the a time.

• 한국자원식물학회지
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• 제14권1호
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• pp.53-59
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• 2001

본 연구는 음나무의 대량증식을 위한 실용적인 실생번식과 녹지 삽목 기술을 개발하고자 실시 하였다. 실생 번식을 위한 노천매장과 1$0^{\circ}C$ 후숙처리는 1주이내에 배의 크기를 3mm이상 유도하였고 발아율은 대조구에 비해 노천매장과 1$0^{\circ}C$에서 후숙된 종자에서 70%이상 높게 나타났다. 녹지 삽목 실험에서 는 삽수의 모수령이 발근에 미치는 효과를 조사한 결과를 보면, 1년생 삽목묘 신초를 삽수로 사용한 것이 68.9%의 발근율로 가장 높고, 모수의 수령이 유령일수록 발근율이 높고, 반면 수령이 증가할수록 발근 능력이 감소하였다. 삽목 시기별 발근 실험에 있어서 1차 생장한 6월 13일 삽목한 삽수가 68.9%로 발근율이 가장 높아 6월중순이 삽목 적기였다. 식물생장조정제 종류 및 농도별 처리에서는 IBA 1000mg.L$^{-1}$ 농도에서 30분간 침적했을 때 발근율이 70%, NAA 1000mg.L$^{-1}$에서 66.7%의 순으로 2000mg.L$^{-1}$ 30초, 500mg.L$^{-1}$ 10시간 처리구 보다 발근율이 높게 나타났다.

• Journal of Forest and Environmental Science
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• 제39권3호
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• pp.150-154
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• 2023

Heloniopsis orientalis (Liliaceae) is an important horticultural crop native to Korea. Under natural conditions, germination is poor and plant growth is delayed. Therefore, we have developed a vegetative propagation method to produce plants with vigorous growth characteristics via tissue culture. The regenerated shoots were then initiated directly from leaf explants on an MS medium containing either 0.5 to 2.0 mg/L 2,4-D or 1.0 to 3.0 mg/L BA. Healthy plantlets with adventitious roots were formed on the medium supplemented with 1.0 mg/L BA (81%). BA triggered callus initiation without caulogenesis or rhizogenesis, and callus formation was better on the half-strength MS medium than on the full-strength medium. This in vitro propagation protocol will be useful for conservation, as well as for mass propagation.

• 한국약용작물학회지
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• 제18권2호
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• pp.93-97
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• 2010

Cultural practices of Asparagus cochinchinensis in highland area were performed for a potential medicinal crop. These studies were examined to propagation methods, planting densities, nitrogen treatments, and cropping years. The results are summarized as follows. The adequate number of buds per tuberous root was 4 for vegetative propagation because the number of tuberous root harvested was 16.8 and the yield was also the highest, exhibiting 1,060 kg/10a. The suitable planting time for vegetative propagation was later than early April. If the earlier tuberous roots were planted, the less they emerged. The highest emergence rate was obtained from the planting density of $30{\times}20cm$ as 97.2% while the yield was highest in the $30{\times}15cm$ density, exhibiting 1,883 kg/10a with emergence rate at 94.9. It seemed that the higher planting density promoted plant height growth and yield in Asparagus cochinchinensis. The highest fresh weight was recorded at 6 kg/10a of nitrogen fertilizer into the sandy loam soil compared to the level of 0, 3, 9 kg/10a. The yield was increased with cropping years. However, the proper harvesting time was the second year of cultivation because the rate of weight increase was maximized in the 2-year-old tuberous root. The yield in the third year was decreased as compared to that of the second year.

• 원예과학기술지
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• 제32권6호
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• pp.788-793
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• 2014

Vegetative propagation of walnut is difficult compared with that of other fruit and nut species. The present study assessed three methods of grafting (patch, shield, and chip) at various periods of walnut growth and with different timings of grafting in walnut. Early May was the best time for grafting, at which time the highest success rate was obtained by the patch method (96%), followed by chip-budding (75%), while shield-grafting showed the lowest efficiency (10%). Patch-grafting was also successful (75-80%) in early August and moderately successful in mid-June (51-55%), while the shield and chip methods had no success during these two times (0.00%). Patch-grafting was more efficient and also induced better callus formation and scion growth than the other two methods. The genotypes used did not affect grafting efficiency. The best results were obtained by patch-budding in both tested genotypes. The present findings show the potential value of patch-grafting in early May as a propagation method for walnut for establishment of guidelines for propagation.

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2011년도 추계학술발표회
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• pp.130-131
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• 2011

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2010년도 심포지엄 및 추계학술발표회
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• pp.173-174
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• 2010