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Younmi Jeon,Myoungsook Lee,Yong-Pil Cheon 한국발생생물학회 2015 발생과 생식 Vol.19 No.4
Black soybean teata is helpful to preventing obesity through enhancing energy expenditure and suppressing accumulation in mesenteric adipose tissue. The ethanol testa-extract of Cheongja #3 black soybean (ETCBS) is also have similar effects on obesity. So far, it is not clear whether the ethanol testa extract of black soybean can have effect on the characters of subcutaneous adipose stem cells such as proliferation, activity, and adipogenicity. The doubling time was different between subcutaneous adipose-derived stem (ADS) and visceral ADS cells. By the in vitro culture and passage, the doubling time was increased both of them. The shape was not different between groups and their passages were not cause the change of shapes. In the case of visceral ADS cells, the doubling time was 62.3 h or 40.3 h in control or high fat diet administrated mice, respectively, but not modified in subcutaneous ADS cells. ETCBS administration caused of increased the doubling time from 62.3 h to 84.2 h. ETCBS had suppressive effects on the cellular activity of subcutaneous ADS cells. The intensity of Oil Red O staining was very faint in 100 and 200 mg/mL ETCBS treated groups. The amounts of accumulated triglyceride were also significantly low in 100 and 200 mg/mL treated groups. From these results we know that the doubling times and the effects of ETCBS are different by the anatomical origin of ADS cells. It also suggested that ETCBS may suppress the differentiation of subcutaneous ADS cells into the precursors and maturing of adipocytes.
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Enhancement of seed germination and microbial disinfection on ginseng by cold plasma treatment
Younmi Lee,Young Yoon Lee,Young Soo Kim,Kotnala Balaraju,Young Sun Mok,Suk Jae Yoo,Yongho Jeon 고려인삼학회 2021 Journal of Ginseng Research Vol.45 No.4
Background: This study aimed to investigate the effect of cold plasma treatment on the improvement of seed germination and surface sterilization of ginseng seeds. Methods: Dehisced ginseng (Panax ginseng) seeds were exposed to dielectric barrier discharge (DBD) plasma operated in argon (Ar) or an argon/oxygen mixture (Ar/O₂), and the resulting germination and surface sterilization were compared with those of an untreated control group. Bacterial and fungal detection assays were performed for plasma-treated ginseng seeds after serial dilution of surface-washed suspensions. The microbial colonies (fungi and bacteria) were classified according to their phenotypical morphologies and identified by molecular analysis. Furthermore, the effect of cold plasma treatment on the in vitro antifungal activity and suppression of Cylindrocarpon destructans in 4-year-old ginseng root discs was investigated. Results: Seeds treated with plasma in Ar or Ar/O₂ exhibited a higher germination rate (%) compared with the untreated controls. Furthermore, the plasma treatment exhibited bactericidal and fungicidal effects on the seed surface, and the latter effect was stronger than the former. In addition, plasma treatment exhibited in vitro antifungal activity against C. destructans and reduced the disease severity (%) of root rot in 4-year-old ginseng root discs. The results demonstrate the stimulatory effect of plasma treatment on seed germination, surface sterilization, and root rot disease suppression in ginseng. Conclusion: The results of this study indicate that the cold plasma treatment can suppress the microbial community on the seed surface root rot in ginseng.
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Lee, Hyeyoung,Oh, Il-Nam,Kim, Jungeun,Jung, Dahan,Cuong, Nguyen Phu,Kim, Younmi,Lee, Jongcheol,Kwon, Oha,Park, Sang Un,Lim, Yongpyo,Kim, Byungjoo,Park, Jong-Tae Elsevier 2018 FOOD SCIENCE AND TECHNOLOGY -ZURICH- Vol.90 No.-
<P><B>Abstract</B></P> <P>In previous study, red Chinese cabbages which satisfy the morphological characteristics of traditional Chinese cabbages were developed by crossing Chinese cabbage and red cabbage, with subsequent backcrossing. In this study, we evaluated the phenolic compound profiles of two newly developed red-phenotype Chinese cabbages in comparison with three typical cultivars. Anthocyanidins (cyanidin), phenolic acids (caffeic acid, <I>p</I>-coumaric acid, ferulic acid, and sinapic acid), and flavonols (quercetin and kaempferol) were identified and quantified by HPLC, LC/MS and LC/MS/MS analyses. The new cultivars contained significantly increased levels of phenolic compounds, except for kaempferol. Their contents drastically varied by sowing season. The spring-sown red Chinese cabbages contained significantly higher levels of phenolic acids (11,530 and 12,437 μg/g dry wt.) and cyanidin (1830 μg/g dry wt.) but lower levels of flavonols than their fall-sown counterparts. Correlation analysis exhibited a significant positive correlation between cyanidin and phenolic acids but a negative correlation between phenolic acids and flavonols in red Chinese cabbages. Principal component analysis could differentiate red Chinese cabbages and typical cultivars with different sowing seasons based on their phenolic compound profiles. This study provides information regarding the selection of appropriate Chinese cabbage cultivars rich in phenolic compounds that may benefit human health.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Newly developed red Chinese cultivars contained significantly increased levels of phenolic compounds. </LI> <LI> Spring-sown red Chinese cabbages contained higher levels of phenolic acids and cyanidin than their fall-sown counterparts. </LI> <LI> Developed red cultivars can be used as raw materials for further industrial application. </LI> </UL> </P>
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Seunghee Lee,Wonsu Cheon,Hyeok Tae Kwon,Younmi Lee,Jungyeon Kim,Kotnala Balaraju,전용호 한국식물병리학회 2023 Plant Pathology Journal Vol.39 No.1
In the present investigation, bacterial isolates from infected apple trees causing apple canker during winter were studied in the northern Gyeongbuk Province, Korea. The pathogen was identified as Pseudomonas syringae pv. syringae (Pss) through various physiological and biochemical characterization assays such as BIOLOG, gas chromatography of fatty acid methyl esters, and 16S rRNA. Bioassays for the production of phytotoxins were positive for syringopeptin and syringomycin against Bacillus megaterium and Geotrichum candidum, respectively. The polymerase chain reaction (PCR) method enabled the detection of toxin-producing genes, syrB1, and sypB in Pss. The differentiation of strains was performed using LOPAT and GATTa tests. Pss further exhibited ice nucleation activity (INA) at a temperature of –0.7°C, indicating an INA+ bacterium. The ice-nucleating temperature was –4.7°C for a non-treated control (sterilized distilled water), whereas it was –9.6°C for an INA– bacterium Escherichia coli TOP10. These methods detected pathogenic strains from apple orchards. Pss might exist in an apple tree during ice injury, and it secretes a toxin that makes leaves yellow and cause canker symptoms. Until now, Korea has not developed antibiotics targeting Pss. Therefore, it is necessary to develop effective disease control to combat Pss in apple orchards. Pathogenicity test on apple leaves and stems showed canker symptoms. The pathogenic bacterium was re-isolated from symptomatic plant tissue and confirmed as original isolates by 16S rRNA. Repetitive element sequence-based PCR and enterobacterial repetitive intergenic consensus PCR primers revealed different genetic profiles within P. syringae pathovars. High antibiotic susceptibility results showed the misreading of mRNA caused by streptomycin and oxytetracycline.
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식물생장촉진근권세균 Bacillus subtilis YGB36을 이용한 고추 탄저병의 생물학적 방제
이용윤(Yong Yoon Lee),이연미(Younmi Lee),김영수(Young Soo Kim),김현섭(Hyun Sup Kim),전용호(Yongho Jeon) 한국식물병리학회 2020 식물병연구 Vol.26 No.1
Red pepper, one of the major economic crops in Korea, is being affected by anthracnose disease caused by Colletotrichum acutatum. To control this disease, an antagonistic bacterial strain, Bacillus subtilis YGB36 identi- fied by 16S rDNA sequencing, physiological and biochemical analyses is used as a biological control agent. In vitro screening revealed that the strain YGB36 possess strong antifungal activity against the pathogen Cylindrocarpon destructans. The strain exhibited cellulase, protease, amylase, siderophore production and phosphate solubility. In vitro conidial germination of C. acutatum was most drastically inhibited by YGB36 cell suspensions (106 cfu/ml) or culture filtrate. Development of anthracnose symptoms was reduced on de- tached immature green pepper fruits by treatment with cell suspensions, and its control value was recorded as 65.7%. The YGB36 bacterial suspension treatment enhanced the germination rate of red pepper seeds and promoted root development and growth under greenhouse conditions. The in vitro screening of fungicide and insecticide sensitivity test against YGB36 revealed that the bacterial growth was not affected by any of the insecticides, and 11 fungicides out of 21 used. Collectively, our results clearly suggest that the strain YGB36 is considered as one of the potential biocontrol agents against anthracnose disease in red pepper.
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Sungmun Kwon(Sungmun Kwon),Jungyeon Kim(Jungyeon Kim),Younmi Lee(Younmi Lee),Kotnala Balaraju(Kotnala Balaraju ),Yongho Jeon(Yongho Jeon) 한국식물병리학회 2023 Plant Pathology Journal Vol.39 No.3
Fungal isolates from infected Chinese quince trees were found to cause black rot in Yeongcheon, Gyeong-sangbuk Province, Korea. The quince leaves withered and turned reddish-brown and fruits underwent black mummification. To elucidate the cause of these symp-toms, the pathogen was isolated from infected leaf and fruit tissues on potato dextrose agar and Levan media. Several fungal colonies forming a fluffy white or dark gray mycelium and two types of fungi forming an aerial white mycelium, growing widely at the edges, were iso-lated. Microscopic observations, investigation of fungal growth characteristics on various media, and molecu-lar identification using an internal transcribed spacer, β-tubulin, and translation elongation factor 1-α genes were performed. The fungal pathogens were identified as Diplodia parva and Diplodia crataegicola. Pathogenic-ity tests revealed that the pathogen-inoculated fruits ex-hibited a layered pattern, turning brown rotting; leaves showed circular brown necrotic lesions. The developed symptoms were similar to those observed in the field. Fungal pathogens were reisolated to fulfill Koch’s pos-tulates. Apples were inoculated with fungal pathogens to investigate the host range. Strong pathogenicity was evident in the fruits, with browning and rotting symp-toms 3 days after inoculation. To determine pathogen control, a fungicidal sensitivity test was conducted us-ing four registered fungicides. Thiophanate-methyl, propineb, and tebuconazole inhibited the mycelial growth of pathogens. To the best of our knowledge, this is the first report on the isolation and identification of the fungal pathogens D. parva and D. crataegicola from infected fruits and leaves of Chinese quince, causing black rot disease in Korea.
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Evaluation of the hypertension disease management program in Korea.
Kim, Younmi,Lee, Kunsei,Shin, Eunyoung,Kim, Hyeongsu,Kyung Ja June Science Press 2010 Asia-Pacific journal of public health Vol.22 No.3
<P>This study evaluated how the Hypertension Disease Management Program (HDMP) affects patient's blood pressure, knowledge, health behaviors, and use of medical services. Evaluation was performed by 2 measures, which were before and after comparison within the management group (n = 210) and comparison between the management group and control group (n = 1050) in 2005. Systolic and diastolic blood pressure of management group significantly decreased from 137.5 and 86.0 mm Hg to 131.2 and 83.8 mm Hg (P < .001, P < .01), respectively. Dieting, snack control, consumption of low-sodium meals, low-cholesterol meals, and fruits or vegetables, regular checking of blood pressure, and stress management techniques significantly increased after HDMP. However, there was no significant difference in the use of medical service between the disease management group and the control group. This study showed that the HDMP improved lifestyle and reduced blood pressure on the disease management group, but changed neither medical costs nor use of medical services. Long-term evaluation should be performed to determine if the HDMP reduce medical costs and use of medical services.</P>
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