• 한국약용작물학회지
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• 제23권1호
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• pp.57-76
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• 2015

A total of 708 methanol extracts from 599 species in 126 families(e.g. Aceraceae) of plant resources were screened for inhibition of cosmetics contaminating microbe, Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans using 96-well microplate bioassay. Four plant extracts including Celastrus orbiculatus inhibited the growth of Staphylococcus aureus over 90%, 38 extracts including Acer palmatum var. nakaii inhibited the growth of Pseudomonas aeruginosa over 60% and 10 extracts including Ilex crenata var. microphylla inhibited growth of Candida albicans over 60%. Plant extracts showing growth inhibition activity against S. aureus, P. aeruginosa and C. albicans could be used as a reference guide for the future development of natural preservatives for cosmetics.

• 한국잡초학회지
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• 제18권1호
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• pp.48-53
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• 1998

노동력 부족으로 대부분의 농가가 논에서 태우거나 볏짚이 있는 상태에서 보리를 파종하고 있으며, 이로 인하여 작물과 잡초의 발생이나 생육이 억제되는 현상이 관찰되고 있다. 이런 현상을 구명하고자, 추출온도, 시간, 추출농도, 생육시기, 품종에 따른 볏짚 추출물이 보리 또는 독새풀의 초장, 근장, 발아율에 미치는 영향을 조사하였다. 1. 볏짚 10%(w/v), $24^{\circ}C$, 5시간 추출액이 보리의 초장, 근장 및 발아를 가장 많이 억제하였다. 2. 5%(w/v)의 볏짚 추출액은 보리의 초장의 신장과 발아를 촉진하나, 독새풀은 억제하였고, 10-20%(w/v)에서 독새풀의 초장, 근장 및 발아율이 61.0-100% 억제되었다. 3. 볏짚의 유묘기, 분얼기, 출수기, 성숙기, 수확기의 추출물중 유묘기의 추출물이 보리의 초장, 근장 및 발아를 가장 많이 억제하였다. 4. 17종의 벼 품종 중 대림벼 추출물이 보리의 생육을 가장 많이 억제하였고, 안중벼가 가장 낮았다. 5 볏짚 추출물에 대하여 10종의 보리품종중 새올보리의 생육이 가장 많이 억제되었고, 부농이 가장 낮았다.

• 한국작물학회지
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• 제29권1호
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• pp.98-101
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• 1984

인삼종자의 내과지는 배생장을 현저히 억제시켰다. 이 억제작용은 내과지에 의한 수분흡수 때문이 아니라 기계적인 것으로 추측되어졌다. 수산화나트리움 2.5％ 용액에 인참종자를 10분 내지 30분 침적시키므로써 배생장을 촉진시킬 수 있었으나 황산처리는 인삼종자의 배생장에 영향을 주지 못했다.

• 한국약용작물학회지
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• 제10권3호
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• pp.206-211
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• 2002

박하와 배초향 정유의 보존료로서의 이용가능성을 타진하기 위해 그 성분조성을 GC-MSD 분석에 의해 실험한 결과 박하 정유의 주된 성분은 isomenthol로서 전체 정유성분 중 25.84%, menthol이 25.48%이었으며 배초향 정유에는 estragole이 79.83%, limonene이 0.12%함유되어 있었다. 2, 5, 10 mg 농도에서도. E. coli O157 : H7 ATCC 43895에 대한 박하 정유의 생육저해환은 $(9{\sim}14\;mm)$, 배초향 정유는 $(10{\sim}18\;mm)$, S. typhimurium ATCC 7988에 대해서는 박하 정유가 $(9{\sim}13\;mm)$, 배초향 정유가 $(13{\sim}20\;mm으로 나타나 두 정유성분 모두 농도 의존적으로 항균작용을 나타내었다. 생균수 측정 실험에서 박하 정유는 2 mg이하의 저농도에서 9시간까지 세균의 증식을 억제시켰으며 5 mg 이상의 농도에서는 9시간이후 E. coli O157 : H7 ATCC 43895와 S. typhimurium ATCC 7988을 모두 사멸시켰다. 배초향 정유는 2 mg이하의 농도에서 12시간까지 세균의 증식이 억제되었고 5 mg이상의 농도에서는 6시간이후 세균이 사멸되었다. E. coli O157 : H7 ATCC 43895에 대한 박하와 배초향 정유 성분의 항균작용을 전자현미경 촬영에 의해 확인한 결과 형태학적인 변화와 세포막과 세포벽의 분리 및 세포내용물 유실이 관찰되어 두 정유성분의 항균효과를 관찰할 수 있었다.

• 농약과학회지
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• 제18권4호
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• pp.439-442
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• 2014

신나밀계 화합물은 다양한 생물에 넓게 분포하는 생물 2차대사산물로 잘 알려져 있으며, 여러 생리활성이 규명되었다. 하지만, 작물의 생장조절기능성 연구결과는 잘 알려져 있지 않아, 본 연구에서는 신나밀기를 갖는 acid, amide, alcohol, aldehyde, ester등 46종의 유도체를 대상으로 발아와 유근생장억제능을 비교평가 하였다. 시험 결과, cinnamyl group을 기본 골격으로 하는 화합물의 경우 carboxylic acid group보다는 ester, amide, aldehyde와 같은 functional group에서 유근생장 억제능이 쉽게 관찰되는 것으로 확인되었다. 또한, EWG는 meta-position에 위치할 때 가장 효과가 높은 것으로 확인되었으며, cinnamamide, 3-chlorocinnamic acid와 4-methoxycinnamaldehyde는 100 mg/L 미만의 처리농도에서 배추에 대한 발아억제를 일으키지 않으며, 유근생장 생장억제기능성이 높아 작물 생장억제제로 사용가능한 cinnamyl 유도체임을 확인하였다.

• 한국약용작물학회지
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• 제23권3호
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• pp.223-230
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• 2015

To study the effect of crop rotation on the control of ginseng root rot, growth characteristics and root rot ratio of 2-year-old ginseng was investigated after the crops of 18 species were cultured for one year in soil contaminated by the pathogen of root rot. Fusarium solani and Cylindrocarpon destructans were detected by 53.2% and 37.7%, respectively, from infected root of 4-year-old ginseng cultivated in soil occurring the injury by continuous cropping. Content of $NO_3$, Na, and $P_2O_5$ were distinctly changed, while content of pH, Ca, and Mg were slightly changed when whole plant of crops cultured for one year were buried in the ground. All of EC, $NO_3$, $P_2O_5$, and K were distinctly increased in soil cultured sudangrass, peanut, soybean, sunnhemp, and pepper. All of EC, $NO_3$, $P_2O_5$, and K among inorganic component showed negative effect on the growth of ginseng when they were excessively applied on soil. The growth of ginseng was promoted in soil cultivated perilla, sweet potato, sudangrass, and welsh onion, while suppressed in Hwanggi (Astragalus mongholicus), Deodeok (Codonopsis lanceolata) Doraji (Platycodon grandiflorum), Gamcho (Glycyrrhiza uralensis), Soybean. All of chicory, lettuce, radish, sunnhemp, and welsh onion had effective on the inhibition of ginseng root rot, while legume such as soybean, Hwanggi, Gamcho, peanut promoted the incidence of root rot. Though there were no significant correlation, $NO_3$ showed positive correlation, and Na showed negative correlation with the incidence of root rot.

• Mycobiology
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• 제51권4호
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• pp.264-272
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• 2023

Onion (Allium cepa L.) is an economically important vegetable crop worldwide. However, various fungal diseases, including Fusarium basal rot (FBR), neck rot, and white rot, reduce onion production or bulb storage life. FBR caused by Fusarium species is among the most destructive onion diseases. In this study, we identified Fusarium species associated with FBR in Jeolla and Gyeongsang Provinces in South Korea and evaluated fungicides against the pathogens. Our morphological and molecular analyses showed that FBR in onions is associated with Fusarium commune, Fusarium oxysporum, and Fusarium proliferatum. We selected seven fungicides (fludioxonil, hexaconazole, mandestrobin, penthiopyrad, prochloraz-manganese, pydiflumetofen, and tebuconazole) and evaluated their inhibitory effects on mycelial growth of the pathogens at three different concentrations (0.01, 0.1, and 1 mg/mL). We found that prochloraz-manganese was highly effective, inhibiting 100% of the mycelial growth of the pathogens at all concentrations, followed by tebuconazole. Fludioxonil showed < 50% inhibition at 1 mg/mL for the tested isolates.

• 한국작물학회지
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• 제43권1호
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• pp.23-27
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• 1998

Inhibition of nodule formation and nitrogen fixation by soil nitrogen, primarily nitrate, is well known in legume plants. The present study was undertaken to evaluate the effect of ${NO_3}^-$ on the nodulation, nitrogenase activity, and growth of supernodulating soybean mutant and its wild type. A greenhouse study was conducted to compare two of supernodulating mutants, 'SS2-2' and 'nts 382', with the normal nodulating cultivar 'Sinpaldalkong 2' when grown in a 1-l styroform cup filled with sand, and fertilized with five levels of ${NO_3}^-$ (0, 2, 4, 8, and 12 mM). During the growth period, each plant was supplied two or three times a week with 50 mL of nutrient solution. Supernodulating soybean mutants, SS2-2 and nts 382, showed more nodules and nodule mass, and greater $C_2\;H_2$ activity than the wild type, Sinpaldalkong 2, regardless of the level of exogeneous nitrogen supply. On the other hand, total dry weight of SS2-2 mutant, which was smaller than Sinpaldalkong 2, did not respond to the various ${NO_3}^-$-N levels. This suggested that supernodulating SS2-2 mutant could maintain fairly high total dry weight at the low ${NO_3}^-$-N level, even in the absence of exogeneous ${NO_3}^-$-N in the nutrient solution. From the reduced top growth and high nitrogen fixing ability of supernodulating mutants, it was surmised that supernodulating mutant could potentially protect agricultural environments from pollution through the reduction in nitrogen fertilization as well as maintain fairly high yield with increasing planting density.

• 한국약용작물학회지
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• 제18권2호
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• pp.113-117
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• 2010

The antioxidant and anticancer activities of Phellinus linteus, Inonotus obliquus, and Pleurotus ostreatus according to extraction methods were measured. The contents of polyphenolic compounds were higher in fermented extracts than those in water extracts. The contents were 192.4mg/100 $m{\ell}$ for Inonotus obliquus vinegar, 186.9 mg/100 $m{\ell}$ for Phellinus linteus vinegar, and 156.5 mg/100 $m{\ell}$ for Pleurotus ostreatus vinegar, respectively. EDA(electron donating ability) in Phellinus linteus that was highest among mushrooms was 83.9% in the water extract and 96.8% in the fermented extract. The growth of stomach cancer cells, SNU-719 was inhibited 62.4%, 65.5%, and 53.0% by Phellinus linteus vinegar, Inonotus obliquus vinegar, and Pleurotus ostreatus vinegar, respectively and also the growth of liver cancer cells, Hep3B was inhibited 67.1%, 68.3%, and 57.6% by Phellinus linteus vinegar, Inonotus obliquus vinegar, and Pleurotus ostreatus vinegar, while the growth of normal cell, DC2.4 was not affected. Even though Phellinus linteus and Inonotus obliquus showed higher inhibition in cancer cell growth, Pleurotus ostreatus can be efficiently used for antioxidant and anticancer activities due to their cheap price in the market.

• 한국유기농업학회지
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• 제19권spc호
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• pp.139-140
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• 2011

In organic farming agriculture, integration of cover crop into cropping system is recommended to improve the soil quality, prevent soil erosion, and control weeds. The aim of this study was to control weeds in soybean fields by integration of cover crops such as hairy vetch and rye. Due to cover crop mulching, weeds occurrence and growth were radically decreased. One month later after transplanting, weed growth inhibition rate of hairy vetch and rye treatment were 98% and 89% respectively, while crimson clover treatment were 50%. These effects last long over two month. The soybean yield of hairy vetch treatment was best. Therefore using hairy vetch as cover crop was highly recommended in organic soybean field.