• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.04a
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• pp.87-87
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• 2019

현대인의 생활수준의 향상에 따른 관상식물의 관심이 증가하여, 자생초화류를 활용하기 위한 연구가 진행되고 있다. 산꼬리풀[Veronica rotunda var. subintegra (Nakai) T.Yamaz.]은 국내 특산식물로서 산지의 초원에서 자생하고, 쪽빛을 내는 화기는 청아한 느낌을 주어 관화식물로서 이용가능성이 높다. 본 연구는 산꼬리풀의 분화 재배기술을 확립하고자 2018년 7월 2일부터 10월 15일까지 수행하였다. 대조구는 플라스틱 화분 10호에 원예상토를 충진한 다음 200구에 셀당 4립 파종하여 생산된 유묘를 정식하였다. 실험은 식재용기(플라스틱 8, 10, 12호 화분, 비닐포트 3, 4치), 토양종류[원예상토 단용, 중화 피트모스:펄라이트(3:1, 4:1), 마사토:중화 피트모스(2:1, 3:1)], 묘의 소질[파종립수(1, 2, 4, 6립), 파종용기(162, 200, 288구 트레이)] 등이 생육에 미치는 영향을 분석하였다. 연구의 결과, 식재용기에 따른 생육은 플라스틱 화분 12호에서 왕성하였고, 포트의 용적량이 클수록 경직경, 측지수, 마디수, 엽수, 개화율이 유의적으로 증가하였다. 토양종류에 따른 생육은 원예상토에서 가장 왕성하였고, 측지수, 경직경, 마디수, 엽수 및 개화율이 모두 우수하여 관상용 재배에 적합하였다. 피트모스 혼용토는 생육이 억제되는 동시에 잎이 황화되는 현상이 나타났다. 마사토 혼용토의 경우, 생육이 억제되는 결과를 보였다. 셀당 파종량을 달리한 유묘를 정식하여 재배한 결과, 초장, 절간장은 파종량이 증가할수록 감소하였고, 포트당 마디수와 엽수는 증가하였으나, 1립 파종묘를 제외하고 유의적인 차이는 없었다. 개화율은 4립 파종묘(44.4%)가 1, 2, 6립 파종묘(20.8~25.0%)보다 높았다. 육묘용기별 생육은 초기생육이 우수하였던 162구 생산묘가 정식 후 재배에도 왕성한 생육을 나타내었다. 결론적으로, 산꼬리풀의 최적의 분화재배를 위해 플라스틱 화분 12호에 원예상토를 충진한 다음 162구 트레이에 포트당 엽수와 개화율이 높은 4립 파종하여 생산된 유묘를 정식하여 재배하는 것이 우수할 것으로 판단된다. 경제적 측면을 고려하여 토양은 비교적 생육이 양호하였던 마사토의 활용방안을 검토하는 것이 좋을 것으로 생각된다.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.08a
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• pp.22-22
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• 2020

너도개미자리는 석죽과의 다년생 초본류로 낭림산 이북으로부터 백두산까지 분포하며 고지대에 자생한다. 7~10월에 흰색의 꽃이 개화하고 종자는 달걀모양으로 표면은 밋밋하다. 본 연구는 지피용으로 사용할 너도개미자리의 분화재배 시 적정 추비, 차광 및 적심 등의 처리 정도를 알아보고자 수행하였다. 재배방법의 확립을 위하여 유용식물증식센터에서 종자를 분양받아 2019년 4월 19일에 트레이에 파종하여 충북대학교 유리온실에서 육묘한 유묘를 7월 4일에 정식하여 실험재료로 사용하였으며, 9월 24일까지 약 11주 동안 재배하였다. 공통 조건은 비닐 포트 3치(7×7cm)에 원예상토를 충진하고 200구 트레이에 셀당 1립씩 파종하여 생산된 1셀을 정식하였다. 추비, 차광, 적심 등은 무처리로 수행하였다. 추비실험은 hyponex 하이그레이드(N-P-K, 7-10-6)를 0, 500, 1000, 2000mg·L^-1의 농도로 엽면시비 하였고, 차광 실험은 0, 35, 55, 75% 차광막을 이용하였으며, 적심은 무적심과 재배 4주차의 1회적심 처리로 구분하였다. 연구의 결과, 너도개미자리는 추비처리 농도가 증가할수록 생육도 증가하는 경향이었으나, 유의성은 확인할 수 없었다. 유의적인 차이는 없었지만 2000mg·L^-1 처리구에서 지상부 및 지하부의 생체중이 가장 무거운 결과를 보였다. 차광처리 별로는 무차광 조건에서 생육이 왕성한 결과를 보였고, 차광률의 증가는 생육을 점차 억제하는 경향이었다. 개화율도 무차광에서 가장 높았으며, 다음으로 35% 차광 순이었고, 55와 75% 차광에서는 개화가 진행되지 않았다. 너도개미자리에 적심처리는 초장과 측지수의 발생을 억제하였고, 개화도 지연되는 경향을 보였다. 결론적으로 너도개미자리의 지피용 재배시 광이 충분한 에 배치하여 재배하는 것이 효과적이다. 추비는 Hyponex 하이그레이드를 2000mg·L^-1의 농도를 처리하는 것이 생육에 유리하며, 적심은 하지 않는 것이 효과적인 재배방법인 것으로 판단된다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.38 no.2
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• pp.151-158
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• 1993

Since the inhibition of floral induction was considered to be an important subject to get high yield of Angelica gigas, the effects of low temperature, daylengh and shading were investigated in this study. The yield of A. gigas root grown by inhibition of floral induction was compared with the yield obtained by traditional cultivation method. When the seedings were exposed to the natural low air temperature condition until late of November, the plants which had 6 to 8 leaves showed vernalizing effect, and when the low temperature treatment was prolonged until mid of January, 4 to 5 leaf plants showed vernalizing effect. But 2 to 3 leaf plants did not show vernalizing effect regardless of the length of chilling treatment. The effectiveness of exposure to low temperature was markedly dependent upon the age of plants. In the artificial low temperature treatment the range of temperature varied with plant age. Vernalizing effect at 1,5 and 9$^{\circ}C$ of temperature did not show 3,5,6 leaf plants, respectively. The bolting percent in 8 leaf plant at 1,5 and 9$^{\circ}C$ for 8 weeks decreased by 80,45 and 5%, respectively. As daylength became longer, the bolting percent of A. gigas was increased. plants which were grown in the full sunlight showed the highest value in bolting percent, and the bolting percent was not decreased significantly with changing from full sunlight to 50% shading. When A. gigas were grown by the inhibition of floral induction, dry root weight per l0a showed the greatest value in 3 year old plant which 3.6 and 2.4 times higher than that of 1 and 2 year old plant, respectively. The yield of root was increased by 73.7% in 2 year old plant and 159.6% in 3 year old plant compared with the yield obtained by traditional cultivation method.

• Journal of the Korean Society of Food Science and Nutrition
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• v.43 no.1
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• pp.67-73
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• 2014

This study was performed to determine the anticancer effects of cultivated Orostachys japonicus (COJ) and wild Orostachys japonicus (WOJ) on primary human prostate cancer cells (RC-58T/h/SA#4 cells). The morphology of cells treated with COJ and WOJ was distorted to shrunken cell masses. In addition, cell death induced by COJ and WOJ was associated with increased population of cells in sub-G1 phase as well as the formation of apoptotic bodies and nuclear condensation. COD and WOJ markedly reduced the number of viable prostate cancer cells in a dose-dependent manner, and cell numbers were lower than control cells. COJ and WOJ also inhibited increases in cell proliferation induced by environmental hormones such as dioxin and bisphenol A in charcoal-treated FBS (cFBS) medium. COJ and WOJ methanol extracts at the tested concentrations (150, 300, and 600 ${\mu}g/mL$) also dose-dependently inhibited cell proliferation induced by environmental hormones. These results indicate that COJ and WOJ exert anticancer effects on primary human prostate cancer cells.

• Research in Plant Disease
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• v.25 no.3
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• pp.114-123
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• 2019

QD LED has an ideal light source for growing crops and can also be used to control plant pathogenic microorganisms. The mycelial growth inhibition effect of QD LED light on Rhizoctonia solani, Phytophthora drechsleri, Sclerotinia sclerotiorum, Sclerotinia minor, Botrytis cinerea, Fusarium oxysporum, Pectobacterium carotovorum, and Xanthomonas campestris were investigated. According to the results, BLUE (450 nm) light, suppressed S. sclerotiorum by 16.7% at 50 cm height from the light source, and 94.1% mycelial growth at 30 cm height. Mycelial growth of Sclerotinia minor was inhibited by 80.4% at 50 cm height and 36.3% at 50 cm height in B. cinerea. S. minor, and B. cinerea was inhibited by 100% mycelial growth at a height of 30 cm from the light source. At 15 cm height, all three pathogens (B. cinerea, S. minor, and S. sclerotiorum) was inhibited by 100%. QD RED (M1) and QD RED (M2) light suppressed mycelial growth of S. minor and B. cinerea by 100% at 30 cm and 15 cm height from the light source. For S. sclerotiorum, QD RED (M1) and QD RED (M2) showed 75.2% and 100% inhibition, respectively. Further experiment was conducted to know the suppression effect of lights after inoculating the fungal pathogens on lettuce crop. According to the results, QD RED (M2) suppressed the S. sclerotiorum by 59.9%. In addition, Blue (450 nm), QD RED (M1), and QD RED (M2) light reduce the infestation by 59.9%. In case of B. cinerea, disease reduction was found 84% by BLUE (450 nm) light. Results suggest that the growth inhibition of mycelium increases by Quantum dot LED light.

• Korean journal of applied entomology
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• v.55 no.4
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• pp.489-494
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• 2016

Biological control of the fungus gnat Bradysia difformis by the predatory mite Hypoaspis aculeifer was examined in hydroponic systems of strawberries in Namwon and Hapcheon varieties of Jeollabuk-do and Gyeongsangbuk-do provinces, respectively, from 2012 to 2013. The damage to strawberries caused by B. difformis was examined in seedling stages and during cultivation periods. To achieve environment-friendly management of B. difformis, 60.6 individuals of H. aculeifer were released per square-meter three and four times during cultivations periods of the Namwon and Hapcheon strawberry varieties, respectively. H. aculeifer had better control efficiency against of B. difformis than that observed with conventional cultural practices. Wilt symptoms and damage of strawberries due to B. difformis were decreased by approximately 7.4-10.4%.

• Korean journal of applied entomology
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• v.45 no.2 s.143
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• pp.173-177
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• 2006

Biological control of Tetranychus urticae by Phytoseiulus persimilis was observed in eggp1ant greenhouse fur spring and autumn season culture. Tetranychus urticae was controlled to low density of less than 1 mite from June 24 after p. persimilis were released 3 times at rate of 10 per plant on June 1, 11, and 18, 2004 in spring season experiment. The population of Tetranychus urticae was also less than 1 mite per eggp1ant leaf from September 1 to October 22 after three times releases of 10 P. persimilis in autumn season experiment. In Phytoseiulus persimilis released plot, the percentage of leaves with T. urticae adults and nymphs were 8.6$\sim$13.3% and 5% or less in spring and autumn season experiment. The density of T urticae was from 1 to 2 on leaves with T urticae adults and nymphs.

• Korean Journal of Food Science and Technology
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• v.32 no.2
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• pp.477-480
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• 2000

This study was undertaken to investigate immunochemotherapeutic activity against tumor growth and cytotoxic activity against tumor cell lines. Phellinus linteus (PL), which was artificially cultured in Morus alba, prolonged significantly the survival rate of mice intraperitoneally implanted with sarcoma 180 and inhibited solid tumor growth on mice subcutaneously implanted with sarcoma 180. The acetone precipitate of water extract of PL was better than its water extract. However, PL showed little cytotoxic activity against tumor cell lines.

• Korean Journal of Plant Resources
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• v.13 no.1
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• pp.11-17
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• 2000

In an effort to produce high quality Angelica gigas in the southern area of Korea, a variety of mulching materials were used to prevent withering during the summer. The experimental results are summarized as follows. Soil water content and temperature under various mulching materials were higher than those without mulching, in all the cases studied. Among various mulching materials P. E.(polyethylene) mulching material showed the highest effect. The appearance of weeds was the lowest when using the black P. E. mulching, while growth of weeds was the greatest when using transparent mulching. Growth and development of the plant were better with P. E. mulching than straw mulching or no mulching, allowed for more and bigger leaves. The bolting rate was about 2∼5%, with a slightly larger value under P. E. mulching. Under P. E. mulching, probably due to good physical properties of the soil the number of roots was large, and the length and diameter were good. Active growth of roots under P. E. mulching resulted in a yield increase of the plant. The black P. E. mulching material showed a prominent effect on suppression of weed growth, and the black P. E. material was considered to be the most recommendable among various P. E. mulching materials when there is a lack of labor.

• Korean Journal of Plant Resources
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• v.26 no.5
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• pp.519-525
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• 2013

The Opuntia extract has been traditionally used to treat diabetes, inflammation, and rheumatoid arthritis in oriental medicine. The purpose of this study is to investigate characteristics of biological activity between Opuntia humifusa and Opuntia ficus-indica which is cultivating in korea using cell-free system or cell-based assay. O. humifusa extract effectively inhibited ${\alpha}$-glucosidase activity or improved the immune function, and its biological activity was more effective than O. ficus-indica extract. The scavenging activity of DPPH radical and the inhibitory effect of tyrosinase similarly showed by O. humifusa and O. ficus-indica extract, however neuroprotective effect only showed a tendency to increase compared with control in PC12 cells. Therefore the results suggest that O. humifusa can be a useful agent for treatment of diabetes and immunodeficiency.