• 한국육종학회지
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• 제41권4호
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• pp.385-390
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• 2009

A resveratrol synthase (RS) gene was isolated from peanut (Arachis hypogaea, L. cv. Jinpoong) plants. This gene was placed under the control of the cauliflower mosaic virus 35S promoter (CaMV35S) and introduced into two Korean varieties of potato (Solanum tuberosum L. cvs. Jasim and Jowon) plants by Agrobacterium-mediated gene transfer. Putative transformants were screened by PCR with primers designed from CaMV 35S promoter, NOS terminator and RS gene. Most of selected transgenic potato plants showed the amplification of expected fragments by PCR of genomic DNA with gene-specific primers, while they were absent in untransformed control plants. Expression of the resveratrol synthase gene was also examined by northern blot analysis. The transformants showed a band which was lacking in the control plant, confirming that the introduced gene is transcribed into mRNA in the transformants. The strength of the band, which reflected the level of mRNA expression, differed among the individual transformants. Among the transformants obtained, the highest trans-resveratrol content in the transgenic young leaves of purple-fleshed "Jashim" was $2.11{\mu}gg^{-1}$ fresh weight and that in the microtubers in vitro of purple fleshed "Jashim" was $8.31{\mu}gg^{-1}$ fresh weight. This amount of resveratrol may have a positive biological effect on human health.

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2003년도 식물바이오벤처 페스티발
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• pp.144-144
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• 2003

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2003년도 식물바이오벤처 페스티발
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• pp.145-145
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• 2003

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2005년도 춘계학술대회 및 국제심포지움 초록집
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• pp.122-122
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• 2005

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2004년도 생명공학 실용화를 위한 비젼
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• pp.127-127
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• 2004

• 한국작물학회:학술대회논문집
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• 한국작물학회 2019년도 추계학술대회
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• pp.56-56
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• 2019

• Journal of Plant Biotechnology
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• 제42권2호
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• pp.77-82
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• 2015

We found that a long period of in vitro culture is a critical factor on the low transformation rate for a specific potato genotype, Solanum tuberosum L. var. Atlantic when phosphinothricin (PPT) was added to select putative transformants in a solid media. The fresh explants of the newly produced plants from a micro-tuber was able to increase the transformation rate significantly while the old explants prepared from a plant maintained for longer than 6 months in vitro by sub-culturing every 3 ~ 4 weeks resulted in a very low transformation frequency. However, Jowon cultivar was not so much influenced by the period of in vitro culture with high transformation rate (higher than 10.0%). Further research need to be explored for the reason why a particular potato genotype, Atlantic is more vulnerable than the Jowon cultivar during the regeneration stage resulting in the low transformation frequency.

• Journal of Plant Biology
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• 제39권2호
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• pp.93-98
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• 1996

In order to enhance the system of potato transformation and further regeneration, potato was transformed using the Agrobacterium tumefaciens harboring $\beta$-glucuronidase (GUS) gene. We found that a series fo modified medium ttained 100% shoot regeneration within 5 weeks after the preincubated explants on stage I medium were infected with Agrobacterium. Callus appeared at the cut edges of stem segments on stage II medium, mainly at the basal parts. Some explants started to form shoots after two to three weeks on stage III medium containing kanamycin (50 mg/L). When transferred to MS medium containing 200 mg/L kanamycin, 81% of the transformed shoots formed roots at the cut edge of the plantlets. In contrast, untrasformed shoots never rooted and became yellowish after few weeks under the same conditions. Southern and northern analysis indicated in vitro shoot regeneration on the callus derived from the potato explants, which were incubated with Agrobacteria. The regeneration cycle was shortened after the transformatin and finally the transformation efficiency was highly enhanced.

• Natural Product Sciences
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• 제15권3호
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• pp.134-138
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• 2009

In an attempt to establish anti-ulcerogenic activity of potato tubers, inhibitory activity against ethanol- and indomethacin-induced gastric ulcer models in rats was evaluated for the first time. From several varieties of potato tubers including Solanum tuberosum L. cv. Superior (white skin and fresh potato) and two new varieties of (Bora valley and Gogu valley), raw potato juice was prepared and the starch was obtained from each juice by filtration and drying. Upon oral administration to rats, raw potato juice showed more or less inhibitory activity. The starch showed higher and dose-dependent inhibitory activity, suggesting that the active ingredient in raw potato juice may be the starch. Particularly, the starch obtained from the tubers of new potato variety, "Bora valley," with purple color, showed the highest inhibitory activity (62.4% and 37.1% inhibition of ulcer index at 500 mg/kg), while omeprazole (proton pump inhibitor) used as a reference drug showed 74.4% and 75.7% inhibition at 20 mg/kg against ethanol- and indomethacin-induced ulcer formation, respectively. The present study provides a first evidence of anti-ulcerogenicity of raw potato juice and the starch. Especially, the starch from "Bora valley" strongly inhibited ulcer formation in rats. Considering that these are food components, they may be safely used for anti-ulcerogenic nutraceuticals.

• 한국식품영양과학회지
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• 제32권6호
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• pp.825-828
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• 2003

일상적인 식생활에서 흔히 애용되고 있는 감자와 양파의 껍질은 농산 부산물로서 거의 폐기되고 있는 점을 감안하여 폐기 농산물의 재활용의 측면에서 또 환경 친화적인 면에서 본 연구를 시도하였으며, 감자껍질(Solanum tuberosum Peel, SP)과 양파껍질(Allium cepa L. Peel, AP)을 수거하여 추출, 분획한 후 각 균주에 대한 생육억제제 효과를 paper disc법에 의하여 살펴보았다. 각 균주에 따른 실험 결과를 보면 여러가지 균들 중에서는 Psedomonas aeruginosa균에서 가장 큰 항균활성을 볼 수 있었으며, 감자껍질에 비해 양파껍질이 대체적으로 높은 항균활성을 나타내었고 특히 양파의 ethylether 층인 APMEE와 butanol층인 APMB는 2000 $\mu$g/mL 농도에서는 17.72 및 16.35 mm의 높은 균 생육억제대가 나타나 본 연구실에서 이미 행한 여러 다른 시료를 이용한 연구 결과 중에서도 아주 높은 항균활성을 보였다. Streptococcus mutans균에서는 초기 농도에서는 SPM에서 균 생육억제 대가 서서히 형성되었으나 APM의 경우는 거의 활성이 보이지 않았지만 최종농도 2000 $\mu$g/mL에서는 ethylether층인 APMEE층에서 매우 높은 균생육 억제대인 11.00 mm로 나타나 같은 농도의 SPMEE보다 높은 항균활성을 보여주었다. Staphylococcus aureus균의 경우 양파의 butanol층인 APMB를 1500과 2000 $\mu$g/mL 농도로 처리하였을 때 각각 10.65, 12.28 mm의 높은 생육억제대가 나타났다. 이외의 균들에서는 각 용매 분획별로는 미약한 항균활성을 보였다. 4가지의 균주에 대한 감자껍질과 양파껍질 분획물의 농도별 각 항균활성을 측정한 결과, 두 시료 모두 ethylether 층에서 가장 큰 항균력을 보였으며, ethylacetate 층과 butanol 층에서도 비교적 높은 항균력을 보였다. 특히 감자껍질의 경우 Pseudomonas aeruginosa 균주에 대해 수층에서의 항균활성이 크게 나타났다. 본 연구결과, 농산 부산물인 양파와 감자껍질을 이 용한 천연 항균제 및 식품 보존제로서의 개발 가능성이 높이 평가되는 것으로 사료된다.