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전유민 샘터사 2023 월간 샘터 Vol.644 No.-

Growth of dropwort plants and their accumulation of bioactive compounds after exposure to UV lamp or LED irradiation

전유민,손기호,김상민,오명민 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.5

High-energy ultraviolet (UV) light is an environmental stress that can be used to stimulate the biosynthesis of bioactive compounds in plants. This study aimed to comparatively determine the effects of UV-A, UV-B, and UV-C lamps or light-emitting diodes (LEDs) on the growth of dropwort (Oenanthe stolonifera) plants, and their contents of bioactive compounds. Dropwort seedlings with 2–3 offshoots were transplanted in a plant factory equipped with white LED and deep flow technique systems, and cultivated under standard growth conditions for 36 days. Thereafter, the dropwort plants were supplementally exposed to one of five UV treatments with energy equivalent to 10 W m−2: UV-C lamps for 2 days, UV-B lamps for 3 days, and UV-A lamps and LEDs with 370 nm or 385 nm peak wavelengths for 14 days. The variable fluorescence (Fv) to maximum fluorescence (Fm) ratio (Fv/Fm) of dropwort leaves began to significantly decrease 3 h after exposure to UV-C, and 6 h after UV-B exposure. Fluorescence in UV-C and UV-B-treated plants was lower than in control and UV-A-treated plants during the entire period of UV irradiation. The fresh weight of the shoots of plants treated with UV was not significantly different to those of the control plants during the entire UV irradiation period. The total phenolic content of dropwort shoots exposed to UV-A and UV-B treatments significantly increased compared to that of the control 1 day after treatment. The total phenolic content was highest in plants treated with the 370 nm UV-A LED, and this was significantly higher (33%) than the control. Plants treated with the 385 nm UV-A LED on day 3 of treatment had the highest total phenolic content compared to the other treatments. A similar trend was observed in contents of flavonoids and persicarin. UV light induced higher anthocyanin content than the control. The activity of phenylalanine ammonia-lyase after UV treatments was significantly higher than the control, supporting the findings of our bioactive compound assays. In conclusion, the results of this study suggest that irradiating vegetables with UV-A LEDs would be useful in plant factories with artificial light for improving vegetable quality without inhibiting growth.

Growth and Bioactive Compounds as Affected by Irradiation with Various Spectrum of Light-emitting Diode Lights in Dropwort

전유민,오명민,손기호,김상민 한국원예학회 2017 Horticulture, Environment, and Biotechnology Vol.58 No.5

The aim of this study was to determine the effect of irradiation of various spectrums generated bylight-emitting diodes (LEDs) on the growth and accumulation of bioactive compounds in dropwort (Oenanthestolonifera). Dropwort plants with 2-3 offshoots were grown under three monochromatic LEDs: red (R; 654 nm),blue (B; 456 nm), and green (G; 518 nm), thirteen combinations of R and B (R:B = 9:1, 8:2, 7:3, and 6:4), RBwith G (R:G:B = 9:1:0, 8:1:1, 7:1:2, and 6:1:3), and RB with white (W) (R:W:B = 8:2:0, 8:1:1, 7:2:1, 7:1:2, and6:2:2) and fluorescent lamps (control) for 6 weeks. R LEDs improved growth characteristics, including plant heightand fresh and dry weights of shoots. Combined LEDs with 70-80% red wavelength resulted in the highest values infresh weight. The B LED treatment resulted in the highest total phenolic and anthocyanin content in dropwortleaves, which increased in the combined LEDs treatments as the proportion of blue wavelength increased. Further,the RWB treatments, regardless of the ratio, resulted in higher anthocyanin contents than that in the RB and RGBtreatments. Persicarin content was also significantly higher in the B treatment than in the R and G treatments. However, compared to the RB treatments, persicarin content in the RGB and RWB treatments was decreased, onaverage, by 72 and 64%, respectively. We suggested that the light spectrum is closely related to the enhancement ofgrowth and bioactive compounds. Our findings provide basic information for designing lighting systems in plantfactories to improve the growth and bioactive compounds in dropwort.

개인맞춤형 건강기능식품 추천용 설문지 개발

전유민,원정현,이승우,홍수연,백유진,조비룡,이형기 대한임상건강증진학회 2022 Korean Journal of Health Promotion Vol.22 No.1

연구배경: 최근 셀프메이케이션 트렌드가 확산되면서 건강기능식품 시장에서 개인맞춤형 서비스의 견고한 성장세가 전망된다. 그러나 개인맞춤형 건강기능식품 추천에 필요한 개인의 생활습관이나 건강상태를 파악하기 위한 표준화된 설문지는 아직 개발된 바 없다. 방법: 본 연구에서는 개인맞춤형 건강기능식품 추천에 필요한 개인의 생활습관 및 건강정보를 평가하기 위한 임상적근거 기반의 설문지를 개발하였다. 먼저 건강기능식품 기능성 영역별로 건강상태에 영향을 미치는 항목을 파악하고자관련 문헌 및 이미 개발된 건강 설문지를 분석하였다. 설문지의 타당도를 높이기 위해 일반적인 건강상태를 파악하는공통 설문지와 건강기능식품 기능성 영역별로 생체조절기능의 저하요인 혹은 저하 증상을 파악하는 상세 설문지로분류하여 문항을 선정하였다. 문항별 답안은 건강 관리가필요할수록 높은 점수가 부여되도록 최저 0점부터 최대 1점까지 점수를 구성하였으며, 이후 전문가 검토를 실시하였다. 결과: 최종 공통 설문지는 ‘기본정보’, ‘과거 병력 및 알레르기’, ‘의약품 투약 및 건강기능식품 복용’, ‘식습관’, ‘생활습관’, ‘기능성 선택’의 6개의 범주 내 총 31개 문항으로 구성됐다. 최종 상세 설문지에는 총 171개의 문항이 포함됐으며, 28개의 건강기능식품 기능성 영역별로 건강 유지·증진에 영향을 미치는 개인 특성을 파악하는 생체조절기능 저하요인 문항과 생체조절기능이 정상적으로 이루어지지 않을때 나타나는 신체적·행동적·정신적 자각 증상의 유무와 정도를 파악하는 생체조절기능 저하 증상 문항으로 구성하였다. 건강기능식품 기능성 영역별 상세 설문지로 도출된 개인 설문 점수를 기반으로 해당 기능성 영역의 건강기능식품이 추천된다. 결론: 본 설문지를 이용하면 개인이 건강기능식품 기능성영역과 관련된 지표들로부터 건강상태를 측정할 수 있다. 아울러 설문지의 임상적 유용성을 높이기 위해 실제 임상에서 사용되는 주관적 평가지표에 기반한 문항으로 구성하였다. 추후 연구를 통해 개발한 설문지의 타당도와 신뢰도를검증하고, 이후 개인맞춤형 건강기능식품 사용자를 대상으로 실제 적용해 본 설문지의 타당도를 재검증하는 작업이필요하다. 이러한 과정을 통해 문항을 보완한다면 개인맞춤형 건강기능식품 추천 서비스에 필요한 표준화된 설문지로써 활용 가능성이 높아지리라 기대한다 Background: This study describes the development of a multi-dimensional questionnaire for the personalized recommendation of health functional foods. Methods: The questionnaire was designed to include two parts: common and detailed. Each question was formulated based on clinical evidence and physician-administered diagnostic tools provided by reputable sources such as government agencies and medical institutions. The common questions were intended to assess overall health status. The detailed questions were organized into 28 categories based on the classification of health functional foods’ health claims by the Ministry of Food and Drug Safety. Each question’s response was evaluated on a scale from 0 to 1. The final score of each category was calculated as the sum of the scores normalized by the number of questions in each category. Two expert physicians in health functional food assessed the content validity of the questionnaire, and the questionnaire was revised accordingly. Results: A total of 31 common questions evaluated overall health conditions based on demographic information, medical history, allergies, prescription medicines, dietary habits, and lifestyle. A question that surveys interest areas was also included to let the responders choose up to three categories for the detailed question part. A total of 173 detailed questions assessed risk factors and symptoms relevant to each healthConclusions: This questionnaire recommends health functional foods by measuring health risks and symptoms, following the classification of health functional foods by the Ministry of Food and Drug Safety. This questionnaire may serve as an evidence-based information collecting tool for a personalized health functional foods recommendation system.

중부지역 2기작 수박 재배 실태 조사

전유민(Yu-min Jeon),김영상(Young-Sang Kim),허윤선(Yoon-Sun Huh),노솔지(Sol-Ji Noh),박성원(Sung-Won Park),김태일(Tae-Il Kim),홍성택(Sung-Taek Hong) 한국원예학회 2018 한국원예학회 학술발표요지 Vol.2018 No.10

중부지역 수박 반촉성 재배 시 품종 및 정식시기 실태 조사

전유민(Yu-Min Jeon),김영상(Young-Sang Kim),김은정(Eun-Jeong Kim),노솔지(Sol-Ji Noh),박성원(Sung-Won Park),김태일(Tae-Il Kim),홍성택(Sung-Taek Hong) 한국원예학회 2019 한국원예학회 학술발표요지 Vol.2019 No.5

Growth of and Bacterial Counts on Several Edible Sprouts Exposed to Spray Ionization

송민정,전유민,오명민 (사) 한국생물환경조절학회 2015 시설원예‧식물공장 Vol.24 No.1

Edible sprouts are highly nutritious, containing numerous health-promoting phytochemicals and nutrients. However, the process of sprouting is subject to potential contamination by microorganisms attached to the seed coat. The objective of this study was to determine the effects of air anions generated by spray ionization on growth and sterilizationof edible sprouts. Treatment with air anions has positive effects on plant growth and sterilization in 4 kinds ofsprouts. Hypocotyl length in red cabbage and kale increased approximately 1.26-fold and radicle length of lettuce, redcabbage, and kale increased 1.4 to 1.6-fold compared to the control. The fresh weight of sprouts in the spray-ionizationtreatment was significantly (16.0-38.5%) higher than that of the controls. Radicle activity in sprouts exposed to anionswas higher than that of the control in all species. Bacterial counts on lettuce, red cabbage, and tatsoi decreased significantly(by 41%, 66%, and 19%, respectively), and bacterial colonies also declined in drainage water. Our findings suggestthat spray-ionization treatment is useful for improving sprout growth and for sterilizing sprouts.

Effects of Winter Cultivation of Green Manure Crop and Application of Organic Resources on Watermelon Yield and Soil Physico-chemical Properties in Greenhouse

김영상,윤곤식,전유민,김은정,노솔지,박성원,김태이,홍성택 한국토양비료학회 2019 한국토양비료학회지 Vol.52 No.4

Organic cultivation is the key to how to efficiently produce agricultural products by using organic resourcesproduced in nature. Use of organic resources enables stable production of agricultural products and is the basis of natural circulation farming methods by preserving agricultural environment. This study was conducted to develop organic watermelon cultivation technology by investigating the effect of winter cultivation of green manure crop and application of organic resources on the physico-chemical properties of soils for the production of organic watermelons. In the test, organic farms were used for cultivating green manure crop and non-cultivating green manure during winter break, and oil, mixed oil, poultry, and guano as organic resources. The growth characteristics of watermelon were higher in winter cultivation of green manure crop, such as stem diameter, leaf length, leaf width, and fresh weight than in the control (no crops). The fruit characteristics and yield of watermelon were significantly higher in winter cultivation of green manure crop than in the control, and the yield of watermelon was similar within organic resources. The soil chemistry have lower electrical conductivity (EC) and higher soil organic matter in winter cultivation of green manure crop and soil physical properties have lower bulk density and higher porosity in winter cultivation of green manure crop. These results showed that the cultivation of winter green crop in greenhouse and application of organic resources improved soil physicochemical properties and watermelon productivity.

무측지 넓은 타원형계 수박 ‘순제로’

윤건식,노솔지,전유민,윤철구,박성원,김은정,김주형,김태일 한국육종학회 2023 한국육종학회지 Vol.55 No.4

As the rural farming population decreases and ages, there is a gradual decrease in watermelon cultivation. Although the productionof small- and medium-sized watermelons is increasing, typical large-sized watermelons are still, which culminates in their cultivation beinga burdensome task for elderly farmers. To address this issue, we developed a watermelon variety, namely, ‘Soonzero,’ that does not requirepruning, as its secondary lateral branches do not occur in primary lateral branches after the growing point it cut. ‘Soonzero’ is a diploidand broad, elliptical watermelon; its uniqueness lies in its green skin and pinkish-red flesh. The conspicuousness of veining on the skin isweak, and the width of the fruit's stripes is similar to that of ‘Sambokggul.’ In terms of variable characteristics, in this study, this varietyproduced 452 seeds, a yield similar to that of ‘Sambokggul,’ with the length and width of the resultant fruit being 25.5 and 24.2 cm, respectively. Additionally, the pericarp of ‘Soonzero’ had a thickness of 1.0 cm and a total soluble solid content of 11.8 °Bx. The yield of ‘Soonzero’was found to be 6,150 kg per 10 acres, similar to that of ‘Sambokggul.’ However, ‘Soonzero’ differs from the control in terms of the followingtraits: fruit stripe width, flower spot shape, and the conspicuousness of veining on the fruit. In conclusion, the secondary lateral branchlessvarieties developed at the Watermelon Research Institute are expected to be quickly distributed to farmers with excellent quality by makingup for their shortcomings by transferring technology to breeding companies and giving consumers the opportunity to choose according totheir purchasing preferences. Above all, since it can reduce the labor required to remove lateral branches, it will help farmers grow watermelonsmore easily by solving aging and labor issues, which are chronic problems in rural areas (Grant number 8807).

Application of Supplementary White and Pulsed Lightemitting Diodes to Lettuce Grown in a Plant Factory with Artificial Lighting

손기호,오명민,전유민 한국원예학회 2016 Horticulture, Environment, and Biotechnology Vol.57 No.6

Light-emitting diodes (LEDs) are currently undergoing rapid development as plant growth light sources in a plant factory with artificial lighting (PFAL). However, little is known about the effects of supplementary light and pulsed LEDs on plant growth, bioactive compound productions, and energy efficiency in lettuce. In this study, we aimed to determine the effects of supplementary white LEDs (study I) and pulsed LEDs (study II) on red leaf lettuce (Lactuca sativa L. ‘Sunmang’). In study I, six LED sources were used to determine the effects of supplementary white LEDs (RGB 7:1:1, 7:1:2, RWB 7:1:2, 7:2:1, 8:1:1, 8:2:0 [based on chip number] on lettuce). Fluorescent lamps were used as the control. In study II, pulsed RWB 7:2:1 LED treatments (30, 10, 1 kHz with a 50 or 75% duty ratio) were applied to lettuce. In study I, the application of red and blue fractions improved plant growth characteristics and the accumulation of antioxidant phenolic compounds, respectively. In addition, the application of green light increased plant growth, including the fresh and dry weights of shoots and roots, as well as leaf area. However, the substitution of green LEDs with white LEDs induced approximately 3.4-times higher light and energy use efficiency. In study II, the growth characteristics and photosynthesis of lettuce were affected by various combinations of duty ratio and frequency. In particular, biomass under a 1 kHz 75% duty ratio of pulsed LEDs was not significantly different from that of the control (continuous LEDs). Moreover, no significant difference in leaf photosynthetic rate was observed between any pulsed LED treatment utilizing a 75% duty ratio versus continuous LEDs. However, some pulsed LED treatments may potentially improve light and energy use efficiency compared to continuous LEDs. These results suggest that the fraction of red, blue, and green wavelengths of LEDs is an important factor for plant growth and the biosynthesis of bioactive compounds in lettuce and that supplementary white LEDs (based on a combination of red and blue LEDs) might be more suitable as a commercial lighting source than green LEDs. In addition, the use of suitable pulses of LEDs might save energy while inducing plant growth similar to that under continuous LEDs. Our findings provide important basic information for designing optimal light sources for use in a PFAL.