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최은지,김학곤,용성현,설유원,박동진,최명석 경상국립대학교 농업생명과학연구원 2020 농업생명과학연구 Vol.54 No.2
Plant regeneration from stems and leaves was carried out for the growth of biomass, hybrid poplar(Populus alba x P. glandulosa)clone, which has various uses for plant purification. Callus was well induced when stem and leaf tissues were cultured in 1.0 mg/L 2,4-D containing MS medium. Shoot regeneration was best induced by zeatin among growth regulators, and Plant regeneration was more regenerated in leaf-derived callus than in stem-derived callus. The growth of regenerated shoots at high and low concentrations of zeatin was similar to that of the control at low concentrations. As the concentration of growth regulators increased, the growth of regenerated shoots showed a big difference among individuals. Hybrid poplar showed color variation of plant stem in medium containing high concentration of growth regulator. Regenerated individuals were in vitro rooted in MS medium containing 0.5 mg/L IBA after 2 weeks of culture. and transferred to the greenhouse for acclimatization. The study is believed to be widely used for the induction of in vitro variants through organogenesis.
용성현,박동진,양우형,설유원,최은지,정미진,서강욱,이철호,최명석 한국산림과학회 2019 Forest Science And Technology Vol.15 No.4
Artemisia sieversiana is being used for the medicinal purpose, there are not many conservation objects, and the species is registered as a rare plant in Korea. There is also no research on the preservation of A. sieversiana seeds. In this paper, we investigated the preservation of seeds using cryopreservation. The vitality and germination rate of seeds were investigated with pretreatment, vitrification, and encapsulation. The initial germination rate of the seeds was 95%. PVS3 solution treated for 60 min showed the highest vitality, and germination rate. When encapsulation, both vitality and germination rate decreased. Changes in vitality rate during storage period were measured. As a result, the seed-maintained vitality when the vitrification solution used. Encapsulation is unavailable because of too much change. Therefore, seeds can be safely preserved without deterioration of vitality at cryopreservation by using PVS 3 solution and it will be helpful in future studies.
Propagation by In Vitro Zygotic Embryos Cultures of the Quercus myrsinifolia
Eun ji Choi,용성현,설유원,박동진,박관빈,김도현,진언주,최명석 강원대학교 산림과학연구소 2021 Journal of Forest Science Vol.37 No.4
Zygotic embryo culture was performed to propagate evergreen oak, Quercus myrsinifolia, which has recalcitrant seeds and is difficult to propagate by cuttings. Zygotic embryos appeared in WPM medium after 14 days, and after 56 days, they developed into complete plants with cotyledons and roots. The medium suitable for zygotic embryo culture was 1/4 WPM medium, showing a shoot growth of 2.43 cm and root growth of 8.7 cm after 8 weeks of culture. As a result of investigating the effect of GA3 on the growth of plants germinated from zygotic embryos through GA3 treatment, the best growth was shown in 0.5 mg/l GA3 treatment. The in vitro rooting and growth of IBA-treated zygotic embryo-derived plants were good in the 0.5 mg/l IBA treatment and rooting and shoot growth were not observed at higher concentrations. And the callus induction rate also increased as the concentration of IBA increased. Plants grown in vitro were transferred to a plastic pot containing artificial soil and acclimatized in a greenhouse for about 4 weeks, resulting in more than 90% survival. As a result of this study, the zygotic embryo culture method was confirmed to be effective for mass propagation of Q. myrsinifolia. The results of this study are expected to contribute significantly to the mass propagation of elite Q. myrsinifolia.
김학곤,강승미,용성현,설유원,최은지,박준호,유찬열,Tamirat Solomon,최명석 한국약용작물학회 2020 한국약용작물학회지 Vol.28 No.1
Background: Although Sancho (Zanthoxylum schinifolium Siebold & Zucc) oil has traditionally been used for its antibiotics properties, there is currently a lack of scientific evidence regarding its biological activities. In this study, we investigated the antimicrobial and antioxidant activities of Sancho oil against food-hazardous microorganisms, phytopathogens, and dermatophytes. Methods and Results: We investiated the antimicrobial activity of Sancho oil against 11 food-hazardous microorganisms, nine phytopathogens, and six dermatophytes. The Sancho oil was found to show the strongest antibacterial activity against Shigella flexneri and Listeria spp. Sancho oil also showed high antifungal activity against plant pathogens, particularly Fusarium oxysporum, and showed antimicrobial activity against dermatophytes such as Trichophyton rubrum, Microsporum canis and Candida albicans. The antioxidant activity of Sancho oil was measured using the DPPH method, and was found to be stronger than that of unrefined oil. Moreover, this activity increased with increasing oil concentration. Conclusions: We found that Sancho oil showed differing antimicrobial activities against food-hazardous microorganisms, dermatophytes, and plant pathogens. The antimicrobial activity spectrum of Sancho oil was not broad and varied among microbial strains. On the basis of our findings, we consider that Sancho oil could be used an antibacterial material for food-borne S. flexneri and Listeria spp., a biopesticide for Fusarium spp., and a treatment for dermatophytes such as T. rubrum.
솜양지꽃(Potentilla discolor Bunge)의 초저온동결보존을 위한 최적 조건 탐색
양우형 ( Woo Hyeong Yang ),용성현 ( Seong Hyeon Yong ),박동진 ( Dongjin Park ),설유원 ( Yuwon Seol ),최은지 ( Eunji Choi ),정미진 ( Mi Jin Jeong ),최명석 ( Myung Suk Choi ) 한국산림과학회(구 한국임학회) 2018 한국산림과학회지 Vol.107 No.3
본 연구는 희귀자생식물인 솜양지꽃의 효율적인 초저온 보존 조건을 탐색하고자 행하였다. 종자의 활력은 PVS2와 PVS3 용액 처리구에서는 약 80% 이상으로 대조구보다 훨씬 높은 활력을 보였다. 종자의 활력은 PVS3가 PVS2 처리보다 높게 나타났다. 종자의 활력은 sucrose처리에도 불구하고 대조구보다 낮았다. PVS2의 60분 처리구와 PVS3의 30분 처리구에서 95%의 발아율을 보였으나 그 외 처리구에서는 발아율이 낮았다. PVS2와 PVS3 처리구에서 배양된 유묘의 생장은 PVS2와 PVS3 용액 30분 처리구를 제외하고는 대조구에 비해 생장이 좋지 않았다. 두 가지 초저온동결보존법 간 유묘 생장에서는 encapsulation법과 vitrification법을 비교한 결과 미세한 차이를 보였으나 통계적으로는 유의성이 없었다. 본 연구는 솜양지꽃의 보존에 도움이 될 것으로 판단된다. This study was conducted to investigate the effective cryopreservation condition of Potentilla discolor Bunge, a rare native plant. Seed viability was more than 80% in PVS2 and PVS3 solution treatments. Seed viability was higher in PVS3 than PVS2 treatment. Seed viability was lower than control in spite of sucrose pretreatment. The germination rate was 95% at 60 min of PVS2 treatment and 30 min of PVS3 treatment but the germination rate was low at other treatments. The growth of the seedling wasn't doing that of the control except for treat PVS2 and PVS3 solution for 30 min. There was no statistically significant difference between the encapsulation method and the vitrification method in the seedling growth between the two cryogenic storage methods. This study is expected to be applied to future conservation methods of Potentilla discolor.