About This Journal

Horticultural Science and Technology (abbr. Hortic. Sci. Technol., herein ‘HST’; ISSN, 1226-8763), one of the two official journals of the Korean Society for Horticultural Science (KSHS), was launched in 1998 to provide scientific and professional publication on technology and sciences of horticultural area. As an international journal, HST is published in English and Korean, bimonthly on the last day of even number months, and indexed in ‘SCIE’, ‘SCOPUS’ and ‘CABI’. The HST is devoted for the publication of technical and academic papers and review articles on such arears as cultivation physiology, protected horticulture, postharvest technology, genetics and breeding, tissue culture and biotechnology, and other related to vegetables, fruit, ornamental, and herbal plants.

 

2019 Impact Factor 0.695

 

  • Research Article

    Convolution Neural Network of Deep Learning for Detection of Fire Blight on Pear Tree
    Tae Hwan Kang, Hyun-Jung Kim, and Hyun Kwon Noh
    In this study, a RGB sensor was installed on a rotary-wing drone to obtain RGB images of a fire blight simulation site ... + READ MORE
    In this study, a RGB sensor was installed on a rotary-wing drone to obtain RGB images of a fire blight simulation site and the actual infection of fire blight (caused by Erwinia amylopora) on pear (Pyrus communis L.) trees, and to develop a system that can determine the occurrence of fire blight in the field by analyzing the RGB images by using Deep Learning's Convolution Neural Network (CNN). The ability to detect fire blight was reviewed by analyzing fire blight learning using the fire blight simulation and applying it to the actual fire blight infection category. The learning of fire blight used the overlap-based Dice function, and the error during learning was performed based on an average of 22%. As a result, 64 of the 80 fire blight infected fruit tree images were recognized as an infection, while 16 images were recognized as non-infected and the predicted rate was 80.0%. In the case of the actual infection of fire blight, 15 of the 21 images of the infected fruit trees were recognized as being infected with fire blight, and 6 images were recognized as non-infected, with a predicted rate of 71.4%. Therefore, our results show that it is possible to detect fire blight by applying images acquired with drones and RGB sensors to a CNN of Deep Learning. The system developed in this study can be applied to the site to reduce the manpower and time required to forecast actual fire blight and also it is believed that rapid response will reduce secondary spread damage. - COLLAPSE
    December 2020
  • Research Article

    Anthocyanins in Tree Peony (Paeonia suffruticosa) and Their Relationship with Flower Color
    Yanzhao Zhang, Yan Zhang, Xujia Duan, Xin Liu, Shuiqing Yuan, Jianming Han, and Yanwei Cheng
    Flower color is an important trait of tree peony (Paeonia suffruticosa), an economically important species. The accurate classification of flower color and ... + READ MORE
    Flower color is an important trait of tree peony (Paeonia suffruticosa), an economically important species. The accurate classification of flower color and understanding of the mechanism involved in creating variations in flower color provide the basis of tree peony breeding and genetic research. This study used the International Commission of Illumination Color System, known as CIELAB or CIE L*a*b*, to measure the flower color of 150 cultivars of the Zhongyuan cultivar group of tree peony. Hierarchical cluster analysis and visual observations were used to divide this cultivar group into five major color lines: white, pink, red, purple, and fuchsia. The brightness (L*) of the flower color gradually decreased with an increase in anthocyanin content. The redness (a*) of the flower color was significantly negatively correlated with total anthocyanin (TA) content in the fuchsia line but was positively correlated with TA in the remaining four color lines. Six types of anthocyanins, including Cy3G, Cy3G5G, Pn3G, Pn3G5G, Pg3G, and Pg3G5G, were mainly found in the Zhongyuan cultivar group by liquid chromatography except in the white line. Stepwise regression analysis showed that Pg3G5G had a significant positive correlation with redness of flower color. Cy3G5G and Pn3G5G had a significant positive correlation with redness in pink, red, and purple color lines. However, Pn3G was negatively correlated with redness in the fuchsia line. This study lays the foundation for further development of new breeds and flower colors in tree peony and for genetic research related to flower color. - COLLAPSE
    December 2020
  • Research Article

    Changes in Germination Rate and Growth of CMV-Resistant GM Pepper and Non-GM Peppers (Capsicum annuum L.) as Influenced by Overwintering Condition and Fruit Drying Method

    월동 조건 및 건조 방법에 따른 CMV 내성 GM 및 non GM 고추의 발아율과 생장

    Kuen Woo Park, Jun Hong Kim, Jun Pill Baek, and Sang Yong Lee

    박권우, 김준홍, 백준필, 이상용

    The effects of wintering conditions and drying methods on the germination rate of CMV-resistant peppers ‘H-15’, non-GM parental line ‘P-2377’ and commercial ...

    CMV 내성 GM ‘H-15’, 모본 ‘P-2377’ 및 몇 가지 품종들의 발아율에 미치는 월동 조건과 건조 방법의 영향을 조사하였다. 1차 연도(2012)에는 ...

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    The effects of wintering conditions and drying methods on the germination rate of CMV-resistant peppers ‘H-15’, non-GM parental line ‘P-2377’ and commercial varieties were investigated. In the first year (2012), ‘H-15’ and ‘P-2377’ were overwintered for 4 months on the ground (1m height) and underground (10, 20, 30cm depth). Overwintered pepper fruits sown with black PE mulching in early April, both varieties germinated regardless of wintering treatment method. ‘H-15’ was grown and fruited in all treatments, but ‘P-2377’ was only fruited in overwintering treatments 20 to 30 cm underground. In the second year (2013) three varieties ‘H-15’, ‘P-2377’ and ‘Buja’ were treated in the overwintering as in 2012, and then sown without mulching. Germinated was achieved, but the weed density (152.6 plants/m2, Beckmacia syzigachne 94.6%) was high, so the seedling growth was very poor and no fruiting. The effect of drying methods (2 weeks of sun drying; dry-heat treatments at 50, 60, 70°C during 48 hours) on the germination rate of 4 varieties (‘H-15’, ‘P-2377’, ‘Shingang’ and ‘Manita’) was investigated in 2013. In the case of seeding immediately after drying treatment, all four varieties germinated in 50°C drying treatment, ‘H-15’ and ‘Shingang’ did not germinated at 60°C, and all varieties did not germinated in 70°C treatment. After drying treatment, it was stored at room temperature for 1 year, and a germination test (2014) was conducted. As a result, germination rated was low, but the trend was similar to that in 2013. Even if the color of dried peppers gets worse, it is believed that drying at 70°C before distribution can completely eliminate the germination rate of GM seeds and prevent environmental pollution.


    CMV 내성 GM ‘H-15’, 모본 ‘P-2377’ 및 몇 가지 품종들의 발아율에 미치는 월동 조건과 건조 방법의 영향을 조사하였다. 1차 연도(2012)에는 ‘H-15’와 ‘P-2377’을 지상(1m 높이) 및 지하(10, 20, 30cm 깊이의 포장)에서 4개월간 월동을 시켰다. 4월 초에 월동한 고추 열매를 멀칭을 하고 파종한 바 두 품종은 월동 처리 방법과는 무관하게 모두 발아하였다. ‘H-15’는 모든 처리에서 생장하고 착과했으나, ‘P-2377’은 지하 20, 30cm 월동 처리에서만 착과하였다. 2차 연도(2013)에는 ‘H-15’, ‘P-2377’, ‘부자고추’ 등 3개 품종을 2012년의 방법과 동일하게 월동 처리한 다음에 멀칭을 하지 않고 파종하였다. 발아는 이루어졌으나, 잡초 밀도(152.6plants/m2, Beckmania syzigachne 94.6%)가 높아서 유묘의 생장이 매우 저조했고 착과하지 않았다. 몬순 시즌에는 잡초 속에서 자라는 고추 줄기에서 기근이 형성되었다. 건조 방법(태양 건조 2주; 건열 처리 50, 60, 70°C, 48시간)이 ‘H-15’, ‘P-2377’, ‘신강’, ‘마니따’ 등 4품종의 발아율에 미치는 영향을 시험(2013)하였다. 건조 처리 후 바로 파종한 경우 50°C 건조 처리에서는 4품종 모두가 발아했고, 60°C에서는 ‘H-15’와 ‘신강’은 발아하지 않았으며, 70°C 처리에서는 모든 품종이 발아하지 않았다. 건조 처리 후 상온 1년간 저장하였다가 발아시험(2014)을 실시한 결과, 발아율은 낮았으나, 2013년과 경향은 유사하였다. 건조한 고추 색은 다소 나빠지더라도 70°C에서 건조하여 유통하는 것이 GM 종자 발아율을 완전히 소거하여 환경 오염을 방지할 수가 있다고 본다.

    - COLLAPSE
    December 2020
  • Research Article

    A Large-Scale Proteome Analysis of Proteins Expressed in the Peel of Malus Domestica ‘Hong-Ro’

    사과 ‘홍로’ 과피에서 발현되는 대규모 단백질체 분석

    Jae Ho Kim, Soo Yong Shim, Eun-Sil Chang, Young-Geol Sohn, Yun-Hee Kim, Jin Gook Kim, and Jeung Joo Lee

    김재호, 심수용, 장은실, 손영걸, 김윤희, 김진국, 이증주

    The proteome expressed in the peel of the Korean apple cv. 'Hongro' was analyzed using two-dimensional electrophoresis, and it was confirmed that ...

    국내 육성 사과품종인 ‘홍로’의 과피에서 발현되는 단백질체를 이차원 전기영동으로 분석한 결과, 502개의 단백질들이 발현되는 것으로 확인되었으며, 이들 단백질들을 MALDI-TOF/TOF로 분석한 ...

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    The proteome expressed in the peel of the Korean apple cv. 'Hongro' was analyzed using two-dimensional electrophoresis, and it was confirmed that 502 proteins were expressed. As a result of analyzing these proteins with MALDI-TOF/TOF, 408 proteins were identified. The identified proteins were sorted by biological function: the most abundant (87) were in the carbohydrate metabolism category [abundance value (AV) total 120.97, 18.2% of total 665.09 in AV]; followed by protein metabolism, 59 (AV total 72.08, 10.8%); protein folding, 37 (AV total 34.12, 5.1%); defense and stress response, 35 (AV total 56.95, 8.6%); protein degradation, 33 (AV total 28.87, 4.3%); antioxidant enzyme, 29 (AV total 41.58, 6.3%); secondary metabolite metabolism, 16 (AV total 16.4, 2.5%); lipid metabolism, 16 (AV total 8.89, 1.3%); transport, 15 (AV total 8.75, 1.3%); cytoskeleton constitution, 14 (AV total, 12.89, 1.9%); allergen, 12 (AV total 104.55, 15.7%); nucleotide metabolism, 11 (AV total 10.83, 1.6%); and ATP synthesis, 10 (AV total 18.46, 2.8%). Among the expressed protein spots, the 1st AV was spot 451 major allergen Mal d 1 (AV 54.42), 2nd was spot 419 unidentified protein (AV 28.40), 3rd was spot 455 MLP-like protein (AV 24.08), 4th was spot 480 glutathione S-transferase (AV 18.61), 5th was spot 166 glutamine cytosolic isozyme (AV 13.26), 6th was spot 421 L-ascorbate peroxidase (AV 12.67), 7th was spot 163 β-cyanoalanine synthase (AV 10.81), 8th was spot 114 enolase-like (AV 10.48), 9th was spot 36 unidentified (AV 10.16), and 10th was spot 452 major allergen Mal d 1 ( AV 8.80). As described above, only a small number of allergen-related proteins were identified, but the total AV was found to be ranked second among all functional classifications, indicating that allergen-related proteins are expressed in large quantities in the peel. From the results of this experiment, it was possible to conceptualize the proteome expressed in the apple peel, and the results may be used as a coordinate for the study of the proteome related to the physiology and breeding fields of apples in the future.


    국내 육성 사과품종인 ‘홍로’의 과피에서 발현되는 단백질체를 이차원 전기영동으로 분석한 결과, 502개의 단백질들이 발현되는 것으로 확인되었으며, 이들 단백질들을 MALDI-TOF/TOF로 분석한 결과, 408개의 단백질들이 동정되었다. 동정된 단백질들을 생물학적 기능별로 정리한 결과, carbohydrate metabolism에 속하는 것들이 87개로 가장 많았으며[abundance value(AV) 합계 120.97, 전체 AV의 합계 665.09의 18.2%], 그 다음은 protein metabolism 59개(AV 합계 72.08, 10.8%), protein folding 37개(AV 합계 34.12, 5.1%), defense 및 stress response 35개(AV 합계 56.95, 8.6%), protein degradation 33개(AV 합계 28.87, 4.3%), antioxidant enzyme 29개(AV 합계 41.58, 6.3%), secondary metabolite metabolism 16개(AV 합계 16.4, 2.5%), lipid metabolism 16개(AV 합계 8.89, 1.3%), transport 15개(AV 합계 8.75, 1.3%), cytoskeleton constitution 14개(AV 합계 12.89, 1.9%), allergy 12개(AV 합계 104.55, 15.7%), nucleotide metabolism 11개(AV 합계 10.83, 1.6%) 및 ATP synthesis 10개(AV 합계 18.46, 2.8%) 등의 순이었다. 발현된 단백질 spot들 가운데 AV 1위는 spot 451번인 major allergen Mal d 1(AV 54.42), 2위는 spot 419번 unidentified protein(AV 28.40), 3위는 spot 455번 MLP-like protein(AV 24.08), 4위는 spot 480번 glutathione S-transferase(AV 18.61), 5위는 spot 166번 glutamine cytosolic isozyme(AV 13.26), 6위는 spot 421번 L-ascorbate peroxidase(AV 는 12.67), 7위는 spot 163번 β-cyanoalanine synthase(AV 10.81), 8위는 spot 114번 enolase-like(AV 10.48), 9위는 spot 36번 unidentified(AV 10.16), 10위는 spot 452번 major allergen Mal d 1(AV 8.80)이었다. 이상에서와 같이, 동정된 단백질들 중 알레르기와 관련된 것들은 소수에 불과하였으나 그 AV의 합계는 전체 기능별 분류 중 2위에 해당하는 것으로 보아, 과피에서는 알레르기 관련 단백질들이 대량으로 발현된다는 것을 알 수 있었다. 본 실험의 결과로부터 사과 과피에서 발현되는 단백질체의 대략적인 전체상을 파악할 수 있었으며, 그 결과는 추후 사과의 재배 및 육종과 관련된 단백질체 연구를 위한 좌표로 이용될 수 있을 것이다.

    - COLLAPSE
    December 2020
  • Research Article

    Improving Photosynthesis, Productivity, and the Mineral Content of Chinese Cabbage Grown on Very Dark-Brown Volcanic Ash Soil

    농암갈색 화산회토양에 의한 배추의 광합성, 생산성 및 무기성분 조성의 향상

    Seo Young Oh, Kyung Hwan Moon, Minji Shin, and Seok Chan Koh

    오서영, 문경환, 신민지, 고석찬

    The photosynthesis, productivity, and mineral content of Chinese cabbage (Brassica campestris subsp. napus var. pekinensis cv. Detong) grown in different soil types ...

    본 연구는 배추의 생산성 및 품질 향상을 위한 토양 개선과 작물 재배 시 관리방법을 평가하기 위하여 제주지역의 토양 유형별(흑색 화산회토양, 농암갈색 ...

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    The photosynthesis, productivity, and mineral content of Chinese cabbage (Brassica campestris subsp. napus var. pekinensis cv. Detong) grown in different soil types on Jeju Island were investigated to develop soil–crop system management, with the goal of increasing crop productivity and quality. The soils were black volcanic ash soil (BS), very dark-brown volcanic ash soil (VDBS), and dark- brown non-volcanic ash soil (DBS). VDBS had a pH of 5.87, relatively close to the optimal pH range for Chinese cabbage cultivation, and slightly higher than the pH of BS and DBS; it had high contents of organic matter, available P2O5, and exchangeable cations (K, Ca, Mg, etc.). Growth of the cabbage head including height, diameter, fresh weight, leaf numbers, and leaf area were greater in Chinese cabbage grown in VDBS compared to BS or DBS. Root biomass was also greater in VDBS, although root length did not differ significantly among soil types. However, the soluble solid content was lower in VDBS than in BS or DBS. The maximum photochemical efficiency (Fv/Fm) of photosystem II was slightly higher in VDBS and DBS, although it had stable values ≥ 0.8 in all three soil types. The SPAD values did not differ significantly and were ≥ 55 in all three soil types. The water-use efficiency (WUE) was slightly higher in VDBS, although the maximum photosynthetic rate (A) and dark respiration (Rd) did not differ among soil types. Of the mineral elements in cabbage head, total nitrogen was lower in VDBS than in BS and DBS. However, all macronutrients, except Mg, and micronutrient Cu were slightly higher in VDBS than in the other soil types. These results suggest that the relatively favorable soil conditions of VDBS (suboptimal pH, high mineral content, etc.) and high water-use efficiency of Chinese cabbage favor head growth and its nutritional value. VDBS was suitable for cultivating Chinese cabbage, considering productivity and product quality, such as its size, weight, and mineral content.


    본 연구는 배추의 생산성 및 품질 향상을 위한 토양 개선과 작물 재배 시 관리방법을 평가하기 위하여 제주지역의 토양 유형별(흑색 화산회토양, 농암갈색 화산회토양, 암갈색 비화산회토양)로 결구형의 월동배추를 재배하여 광합성, 생산성 및 무기성분 함량의 변화를 분석하였다. 농암갈색 화산회토양은 토양산도가 pH 5.87로 배추생육에 적합하며, 유기물과 유효인산, 토양 내 치환성 양이온(K, Ca, Mg 등) 함량도 높은 편이다. 월동배추의 지상부 길이와 폭, 생체중과 건물중, 엽수와 엽면적은 흑색 화산회토양과 암갈색 비화산회토양에 비해 농암갈색 화산회토양에서 재배하였을 때 더 높았으며, 뿌리의 길이는 토양 유형 간에 차이가 없으나 생체중과 건물중 역시 농암갈색 화산회토양에서 높았다. 그러나 가용성 고형물 함량은 흑색 화산회토양과 암갈색 비화산회토양에서 보다 농암갈색 화산회토양에서 낮았다. 광계II의 최대 광화학적 효율(Fv/Fm)은 모든 토양에서 0.8 이상으로 안정된 값을 보였으나, 농암갈색 화산회토양과 암갈색 비화산회토양에서 다소 높았다. 잎의 SAPD 값은 55 이상으로 토양 유형 간에 유의한 차이를 보이지 않았다. 그리고, 광합성률(A)과 호흡률(Rd)도 토양 유형 간에 차이가 없었으나, 수분이용효율(WUE)은 농암갈색 화산회토양에서 다소 높았다. 배추의 무기성분들 중에 T-N은 농암갈색 화산회토양에서 낮았으나, Mg을 제외한 모든 다량원소들과 미량원소 중 Cu의 함량은 농암갈색 화산회토양에서 재배된 배추에서 더 높았다. 이러한 결과는 농암갈색 화산회토양에서 재배된 배추는 높은 수분이용효율과 생육에 적합한 토양 특성으로 인해 뿌리 성장이 양호해지고, 수분과 양분 흡수율이 높아져 지상부 생산성이 높고 식품영양학적 측면을 고려한 상품성도 높은 것으로 평가된다. 따라서 월동배추의 결구 크기나 무게, 미량원소 함량 등 상품성과 생산성을 감안했을 때 농암갈색 화산회토양에서 배추를 재배하는 것이 적절하다는 것을 시사해 준다.

    - COLLAPSE
    December 2020
  • Research Article

    Effect of Light Intensity and Temperature on the Growth and Functional Compounds in the Baby Leaf Vegetable Plant Peucedanum japonicum Thunb.
    Jae-Kyung Kim, Ho-Min Kang, Dong-Chul Jang, Jong-Kuk Na, and Ki-Young Choi
    This study was carried out to determine the optimal light intensity and temperature for cultivation of Peucedanum japonicum Thunb., a new baby ... + READ MORE
    This study was carried out to determine the optimal light intensity and temperature for cultivation of Peucedanum japonicum Thunb., a new baby leaf vegetable, and to improve the functional compounds through short-term stress just before harvesting. Plants were cultivated in a controlled environment at a temperature of 25 ± 1°C and relative humidity of 60 ± 5% for 16 days. Plants 3-5 cm high with 1st and 2nd true leaves were grown with different light intensities or temperatures. Treatments were 50, 100, 250, or 500 µmol·m-2·s-1 PPFD and 18/14°C, 24/20°C and 30/26°C of day and night temperature. At the harvest time of the baby leaf vegetables, growth, chlorophyll content, and functional compounds were investigated. The optimum light intensity for growth of P. japonicum Thunb. was PPFD 250 for 12 days, and the best temperature was 24/20°C. Total phenolic content was higher under high light intensity and low temperature treatment. When the plants were treated for 3 days with temperature (18/14°C and 25/20°C) and light intensity (PPFD 200 and 500) before harvesting, there was no difference in growth, but total phenolic content was high in PPFD 200 or 500 under 18/14°C treatments. Free radical activity (DPPH) was significant for temperature and light treatment. The highest free radical activity was in PPFD 500 under 18/14°C treatments. Therefore, after cultivation at optimal light and temperature, low-temperature treatment for three days before harvesting was effective for enhancing the functional contents. - COLLAPSE
    December 2020
  • Research Article

    Reverse Transcription Loop-mediated Isothermal Amplification Assay for Detecting Peach Latent Mosaic Viroid in Peach Pollen
    Hyo-Jeong Lee and Rae-Dong Jeong
    Artificial pollination is used to increase the yield of many fruit crops. However, much of the pollen used for this process is ... + READ MORE
    Artificial pollination is used to increase the yield of many fruit crops. However, much of the pollen used for this process is imported from other countries, thereby increasing the risk of introducing plant pathogens, such as peach latent mosaic viroid (PLMVd). According to the Animal and Plant Quarantine Service in Korea, PLMVd is a quarantine pathogen that reduces both fruit yield and tree vigor. Therefore, the aim of the present study was to develop a reverse transcription-loop-mediated isothermal amplification (RT-LAMP) assay for detecting PLMVd in imported pollen. The optimum RT-LAMP conditions were incubation at 63°C for 60 min, and the assay was both highly specific and 10 times more sensitive than RT-PCR. The usefulness of the RT-LAMP assay was also confirmed by screening both imported pollen and leaf samples for PLMVd. Thus, the present study demonstrates the usefulness of RT-LAMP for the rapid screening of PLMVd in field conditions, peach certification programs, and quarantine inspections. - COLLAPSE
    December 2020
  • Research Article

    Prediction of Strawberry Growth and Fruit Yield based on Environmental and Growth Data in a Greenhouse for Soil Cultivation with Applied Autonomous Facilities
    Ha Seon Sim, Dong Sub Kim, Min Gyu Ahn, Su Ran Ahn, and Sung Kyeom Kim
    The ability to predict how well crops will grow and how much fruit they will yield is important for farmers, consumers, and ... + READ MORE
    The ability to predict how well crops will grow and how much fruit they will yield is important for farmers, consumers, and researchers. Advances in environmental and plant measurement equipment provide the opportunity for more data to be collected from plant growing operations, which could result in more accurate predictions. The objective of this study was to predict the strawberry growth and fruit yield using environmental and growth data collected with this equipment. The correlation coefficients of the average daily air temperature and soil temperature data for strawberry growth predictions were higher than the relative humidity, soil moisture content, electronic conductivity, CO2 concentration, photosynthetic active radiation, and vapor pressure deficit data. The correlation coefficients of photosynthetic active radiation, vapor pressure deficit, and relative humidity for strawberry yield prediction were higher than the other environmental data and all growth data such as plant height, crown diameter, and leaf length and width. The regression model using environmental data showed high correlation coefficients with the actual yield data (R2 = 0.99). These results indicate that strawberry growth and fruit yield could be predicted using environmental data. - COLLAPSE
    December 2020
  • Research Article

    Effect of Planting Density by Cultivars on the Growth and Yield of Melons (Cucumis melo L.) in Hydroponics Using Coir Substrates

    코이어 배지 수경재배 시 재식밀도가 멜론(Cucumis melo L.) 3품종의 생육과 수량에 미치는 영향

    Mi Young Lim, Ho Jeong Jeong, Su Hyun Choi, Gyeong Lee Choi, and So Hui Kim

    임미영, 정호정, 최수현, 최경이, 김소희

    This study aimed to evaluate the effect of planting density by cultivar on the growth, quality, and yield of melon (Cucumis melo ...

    이 연구에서는 코이어 배지를 이용한 수경재배 시 멜론(Cucumis melo L.) 품종에 따른 재식밀도가 생육, 품질 및 수량에 미치는 영향을 구명하였다. ‘얼스킹스타 ...

    + READ MORE
    This study aimed to evaluate the effect of planting density by cultivar on the growth, quality, and yield of melon (Cucumis melo L.) in hydroponics using coir substrates. Experiments were conducted using three domestic netted melon cultivars, namely ‘Earl’s Kingstar’, ‘Hero’, and ‘PMR Dalgona’. The plants were transplanted on March 19, 2019 to a venlo-type glass greenhouse. The spacing between the rows was 1.5 m and the planting density was 2.0, 2.7, and 3.3 plants/m2 (the within-row planting distance was 0.33, 0.25, and 0.20 m, respectively); the plants were grown using slabs of equal sizes (100 × 20 × 10 cm). The electrical conductivity (EC) levels in the supplied nutrient solution were 1.8 and 2.1 dS∙m-1 after transplanting and fruit setting, respectively. The EC level in the drained solution was less than 1.0 dS∙m-1 in the early stages of growth; it increased to 3.0 dS∙m-1 in the middle stages with the increase in irrigation, and in the late stages of growth, it was about 4.0 dS∙m-1 in all the treatments. The planting density did not have any significant effect on the EC level and pH of the drained solution. An evaluation of the growth of all the three cultivars showed that the lower the planting density, the larger the stem diameter, leaf length, leaf width, and leaf area of the plants. The lengths from 0 to 10th node tended to be small when the planting density was 2.0 plants/m2, and the node length from 10th to 20th node did not differ among different plant densities. The lower the planting density, the heavier the fruit in all the three cultivars and the higher the soluble solids content. However, the yield increased by 20.8 to 32.6% as the planting density increased from 2.0 to 3.3 plants/m2. For ‘PMR Dalgona’, the rate of decline in average fruit weight was the lowest by 19.6% and the rate of yield increase was the highest by 32.6% when increasing the planting density from 2.0 to 3.3 plants/m2. For ‘Earl’s Kingstar', on the other hand, the rate of average fruit weight decreased the most by 26.8% and the rate of yield increased the least 20.8%. The heavier fruit weight had a large decrease in the average fruit weight by planting density, which showed the sensitivity of planting density depending on cultivars. Therefore, this study suggests that cultivars with a higher planting density with greater production per unit area have an advantage from an economic point of view, whereas the lower planting density is reasonable in terms of fruit quality.


    이 연구에서는 코이어 배지를 이용한 수경재배 시 멜론(Cucumis melo L.) 품종에 따른 재식밀도가 생육, 품질 및 수량에 미치는 영향을 구명하였다. ‘얼스킹스타’, ‘히어로’ 및 ‘피엠알달고나’ 등 국내에서 육성한 네트형 멜론 3품종을 2019년 3월 19일부터 6월 17일까지 재배하였다. 배지는 동일한 규격의 코이어 슬라브(100 × 20 × 10cm)를 사용하였고, 이랑 간격은 1.5m로 고정하였으며, 재식 밀도는 2.0, 2.7, 3.3plants/m2(식물체 간격 0.33, 0.25, 0.20m)로 설정하였다. 급액 농도는 정식 초기 및 착과 후 각각 1.8 및 2.1dS·m-1로 공급하였다. 배액의 EC를 분석한 결과, 생육 초기에는 1.0dS·m-1이하, 관수량이 늘어나는 생육 중기에는 3.0dS·m-1, 생육 후기에는 모든 처리구에서 약 4.0dS·m-1으로 높아졌다. 배액의 EC와 pH는 재식밀도 처리에 따라 유의한 차이가 나타나지 않았다. 식물체의 생육을 조사한 결과, 줄기 직경, 엽장, 엽폭, 엽면적은 3품종 모두 재식밀도가 낮을수록 컸다. 0 ‑ 10마디까지의 줄기 길이는 재식밀도가 낮은 2.0plants/m2에서 짧아지는 경향이었고, 10 ‑ 20마디의 길이는 처리 간 차이가 없었다. 3품종 모두 재식밀도가 낮을수록 과중은 무거웠으며, 가용성 고형물 함량은 높았다. 그러나, 재식밀도를 2.0에서 3.3plants/m2으로 증가시켰을 때 수량이 20.8 ‑ 32.6% 증가하였다. ‘피엠알달고나’ 품종의 경우 재식밀도가 2.0에서 3.3plants/m2 증가할수록 평균 과중의 감소율이 19.6%로 가장 낮았고, 수량의 증가율는 32.6%로 가장 높았다. ‘얼스킹스타’ 품종은 평균 과중의 감소율이 26.8%로 가장 컸고, 수량의 증가율은 20.8%로 가장 낮았다. 과실 개당 과중이 무거운 품종일수록 재식밀도에 따른 평균 과중의 감소폭이 더 큰 결과를 보였다. 따라서 품종에 따른 재식밀도의 민감성 여부를 알 수 있었고, 경제성을 고려하면 단위면적당 생산량이 많은 재식밀도가 높은 쪽이 유리하고 과실 품질 측면에서 볼 때 재식밀도가 오히려 낮은 것이 적정하다.

    - COLLAPSE
    December 2020
  • Research Article

    Gaseous Chlorine Dioxide Treatment Suppresses Decay and Microbial Growth in Cold-stored Jujube Fruit
    Hyowon Park, Chul-Woo Kim, Narae Han, Minjae Jeong, and Uk Lee
    Gaseous chlorine dioxide (ClO2) fumigation is widely used in various industries as a strong oxidizing and sanitizing agent to eliminate harmful ... + READ MORE
    Gaseous chlorine dioxide (ClO2) fumigation is widely used in various industries as a strong oxidizing and sanitizing agent to eliminate harmful microorganisms. Here, we investigated the effectiveness of ClO2 fumigation in suppressing decay and microbial growth in jujube fruit during cold storage. ClO2 fumigation significantly reduced the decay incidence of jujube fruit; in particular, treatment with 30 mg·L-1 and 50 mg·L-1 ClO2 maintained the decay rate below 7.0% for up to 4 weeks of storage, whereas the decay rate of the control was approximately 20%. Moreover, the decay rate of fruit treated with 50 mg·L-1 ClO2 was maintained below 20% until the end of storage (6 weeks). In addition, 50 mg·L-1 fumigation completely prevented aerobic bacterial growth during the first 2 weeks of storage; after 6 weeks, the aerobic bacteria count in the groups treated with 30 mg·L-1 and 50 mg·L-1 ClO2 was 2.4 log colony-forming units per gram, which was 30% lower than that of the control. Total yeast and mold growth were also well controlled during storage, even with only 10 mg·L-1 of gaseous ClO2 fumigation. These data demonstrate that 30 - 50 mg·L-1 of gaseous ClO2 fumigation suppressed postharvest jujube fruit decay by controlling fungal and bacterial growth on the surface, and it is recommended as an effective method to maintain crop quality. - COLLAPSE
    December 2020
  • Research Article

    Changes in Fruit Quality Attributes, Cell Wall Materials, and Related Hydrolases Activities in 1-Methylcyclopropene (1-MCP)-treated ‘Honggeum’ Apples during Cold Storage
    Jingi Yoo, Haram Jung, Nay Myo Win, Jung-Geun Kwon, Young-Je Cho, Hee-Young Jung, Dong Hoon Lee, and In-Kyu Kang
    We investigated the effects of 1-methylcyclopropene (1-MCP, SmartFreshTM) concentrations on fruit quality attributes associated with softening and cell wall metabolism in ... + READ MORE
    We investigated the effects of 1-methylcyclopropene (1-MCP, SmartFreshTM) concentrations on fruit quality attributes associated with softening and cell wall metabolism in ‘Honggeum’ apples. Fruits were treated with 0, 0.5, or 1 µL·L-1 1-MCP and stored at 0 ± 1°C for up to 6 months. In comparison with the untreated fruits, both 1-MCP concentrations similarly reduced the internal ethylene concentration and delayed the reduction in firmness and titratable acidity; however, weight loss and soluble solids content were less affected by 0.5 µL·L-1 1-MCP compared with 1 µL·L-1 1-MCP. Peel color variables (L* and b*) were not changed by either 1-MCP treatment on both the sunlit and shaded sides. Only the a* value on the shaded side was slightly decreased among untreated fruits at 3 and 4 months in comparison with 0.5 µL·L-1 1-MCP-treated fruits. The uronic acid and total sugar contents of the cell wall and cell wall hydrolase of the enzyme activities (α- galactosidase, β-galactosidase, β-glucosidase, β-arabinosidase, β-xylosidase, and α-mannosidase) were much greater in fruits treated with 1 µL·L-1 1-MCP than in fruits treated with 0.5 µL·L-1 1-MCP and in untreated fruits. Overall, the results suggested that 1 µL·L-1 1-MCP may be an effective concentration to retain fruit quality attributes and delay fruit softening in ‘Honggeum’ apples during cold storage by reducing enzymatic activities related to cell wall hydrolysis. - COLLAPSE
    December 2020