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 provides 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.

 

2018 Impact Factor 0.589

 

  • Review

    Horticultural Technology Trends in the Korean Seed Industry
    Go-Eun Yu, Su-Yeon Kim, Ji-Weon Choi, Soo-Jin Kwon, and Chang-Kug Kim
    Using 10,625 valid patents registered among six countries and 6,949 plant varieties registered in Korea, we evaluated technology trends in ... + READ MORE
    Using 10,625 valid patents registered among six countries and 6,949 plant varieties registered in Korea, we evaluated technology trends in the horticultural seed industry. The six patent indices were investigated to determine the technology stage, such as market capability, technological level, and technological development potential, for different types of crop seeds. In addition, a patent multilayer (PM) model was developed based on vacant technology, future growth, and entry barriers to predict the best directions for technology development. In Korea, seed technologies for horticultural crops have low growth potential, although they are at a mature developmental stage and do not have high market concentration. There is high market competitiveness and development potential for flower seed technologies, whereas technologies for fruit seeds are in a decreasing developmental stage. - COLLAPSE
    April 2020
  • Research Article

    Phenological Characteristics of Potted Kumquat under Protected Culture
    Yung-Chiung Chang, Yu-Sen Chang, Iou-Zen Chen, and Lian-Hsiung Lin
    This study investigated phenological changes, shoot growth, and flowering habits of potted kumquat [Fortunella margarita (Lour.) Swingle] grown in subtropical conditions of ... + READ MORE
    This study investigated phenological changes, shoot growth, and flowering habits of potted kumquat [Fortunella margarita (Lour.) Swingle] grown in subtropical conditions of I-Lan County, Taiwan. The shoots of the second, third, and fourth flushes of kumquat sprouted in mid-May, early July, and early September, corresponding to 70-80, 112-122, and 168-178 days after the buds sprouted from the first flush, respectively. As the flushing sequence progressed, the number of shoots, the rate of flowering, and the number of flowers decreased. There were four flowering peaks in 2010 and five in 2011. The shoots of the secondary and tertiary flushes still bloomed in 2010, but they did not flower in 2011. In 2011, the second flowering period of the first flush shoot, which flowered in mid-July, fruit set, and fruit growth showed the best performance, and the whole fruit development duration took about 169 days. - COLLAPSE
    April 2020
  • Research Article

    Foliar Application of Ethinyl Estradiol and Progesterone Affects Morphological and Fruit Quality Characteristics of Strawberry cv. Camarosa
    Mohammad Reza Kalantari, Vahid Abdossi, Forogh Mortazaeinezhad, Ahmad Reza Golparvar, and Zahra Shahshahan
    There is no reliable information about the effects of mammalian sex hormones (MSHs) on fruit production and storability. Therefore, this study was ... + READ MORE
    There is no reliable information about the effects of mammalian sex hormones (MSHs) on fruit production and storability. Therefore, this study was carried out to evaluate the effect of foliar application of MSHs [ethinyl estradiol (EE) and progesterone (Prog) at 0.001 and 1.0 ppm concentrations] during the growing season on morphological and fruit physicochemical characteristics in strawberry (Fragaria × ananassa) cv. Camarosa fruit at harvest, as well as during 4 weeks of cold storage. Plants treated with EE and Prog showed better morphological characteristics. Moreover, these plants produced bigger and heavier fruit with higher total soluble solids (TSS), chlorophylls, vitamin C content, and peroxidase (POD), superoxide dismutase (SOD), and glutathione reductase (GR) activities at harvest, and lower titratable acidity (TA) content and catalase (CAT) activity. On the other hand, the length/width ratio of first fruit, pH, and anthocyanin content was not significantly affected by EE and Prog application. Cold storage significantly enhanced pH, TSS, TA, vitamin C content, and SOD and CAT activities, whereas POD activity significantly decreased during 4 weeks of cold storage. Overall, the foliar application of EE and Prog, especially at 1.0 ppm, would be a highly recommended practice in the production of strawberry cv. Camarosa fruit. - COLLAPSE
    April 2020
  • Research Article

    Responses of Vegetable Seedlings Grown on Cylindrical Paper Pots or Plug Trays to Water Stress
    Dong Cheol Jang, Young Woo Kweon, Si Hong Kim, Dae Hoon Kim, Jea Kyung Kim, Jea Yun Heo, and Il Seop Kim
    The objective of this study was to examine responses of vegetable seedlings grown on plug seedling system (Plug) or cylindrical paper pot ... + READ MORE
    The objective of this study was to examine responses of vegetable seedlings grown on plug seedling system (Plug) or cylindrical paper pot (CPP) system to water stress. Cucumber ‘Jo-eun’ was grafted onto stock ‘Huckjong’. Watermelon ‘Jo-eunggul’ was grafted onto stock ‘Bulojangsaeng’. Growth factors of seedlings were investigated. Top-to-root ratio (TRR), compactness (CP), and Dickson Quality Index (DQI) as indicators of seedling quality were calculated based on time periods. Results revealed that the overall shoot of cucumber and watermelon grown in the CPP system was higher than the shoot grown in the Plug system. In both CPP and Plug systems, the total growth decreased as the irrigation water volume increased, while the seedling stem was thick and hard. The higher the irrigation water level, the greater was the inhibition of root zone development. When the degree of growth reduction was comparing between the two systems, the growth rate of cucumber was lower in the CPP system than that in the Plug system, whereas the growth rate of watermelon was decreased due to increased irrigation water content only in the Plug system. The degree of growth tended to decrease with increasing volume of irrigation water in both CPP and Plug systems. The degree of decreased growth was greater in the Plug system than in the CPP system. The decrease started to occur in the mid-growth phase. It intensified with further growth. In conclusion, extensive irrigation during early stages of growth can enhance the growth of seedlings in both CPP and plug systems. However, growth was suppressed after reaching a certain level. This effect was relatively lower in the CPP system than in the Plug system. - COLLAPSE
    April 2020
  • Research Article

    Growth Characteristics and Yield of Asparagus ‘Atlas’ Grown in an Open Field and Rain-Shelter House System

    아스파라거스 ‘Atlas’의 노지 및 비가림하우스 재배에 따른 생장 특성과 생산량

    Seo Yeon Ha, Tae Heon Lee, Rayhan Ahmed Shawon, Buk Gu Heo, Ho Cheol Kim, Jong Hyang Bae, and Yang Gyu Ku

    하서연, 이태헌, Rayhan Ahmed Shawon, 허북구, 김호철, 배종향, 구양규

    This study was performed to select cultivation systems best-suited for cultivation of asparagus (Asparagus officinalis) cultivar ‘Atlas’ in Korea. Bud break, spear ...

    본 연구에서는 국내에서 재배하기 적합한 재배시스템을 선택하기 위해 비가림하우스와 노지 재배에 따른 아스파라거스의 맹아 출현, 유경의 생산량, 지하부 생장특성을 조사하였다. 비가림하우스에서 재배한 ...

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    This study was performed to select cultivation systems best-suited for cultivation of asparagus (Asparagus officinalis) cultivar ‘Atlas’ in Korea. Bud break, spear yield, and underground part growth characteristics under two different cultivation systems (rain-shelter and open field) were investigated. Asparagus grown in the rain-shelter greenhouse emerged from dormancy about 10 days earlier than that grown in the open field, and demonstrated a 3-fold higher yield in terms of the number and weight of spears, which increased with increasing plant age. In the analysis of the growth characteristics of the underground part, the mean bud diameter of asparagus grown in the rain-shelter greenhouse was 1.7-fold thicker than those of grown in the open field. Roots of asparagus grown in the open field were lighter but longer than those of asparagus grown in the rain-shelter greenhouse. The higher fresh and dry weight of the roots and larger bud size of asparagus grown in the rain-shelter greenhouse are expected to lead to higher yield in the following year. Selection of cultivation systems that can accelerate bud break and increase spear yield will contribute to increasing farming income. Therefore, growing the ‘Atlas’ cultivar in the rain-shelter house is expected to lead to higher yield, and will contribute to increasing farming income.


    본 연구에서는 국내에서 재배하기 적합한 재배시스템을 선택하기 위해 비가림하우스와 노지 재배에 따른 아스파라거스의 맹아 출현, 유경의 생산량, 지하부 생장특성을 조사하였다. 비가림하우스에서 재배한 아스파라거스는 노지보다 맹아 출현이 10일 이상 빨랐다. 비가림하우스에서 생산된 유경의 직경은 노지보다 두꺼웠고 유경의 개수와 무게는 노지보다 3배 이상 많았으며 묘령이 증가할수록 유경의 개수와 무게가 증가했다. 아스파라거스의 지하부 생장특성을 조사한 결과, 비가림하우스에서 재배한 눈의 크기는 노지보다 1.7배 컸다. 노지에서 재배한 뿌리는 비가림하우스보다 무게가 낮은 반면에 뿌리의 길이가 길었다. 비가림하우스에서 재배한 아스파라거스는 노지 재배보다 뿌리의 생체중과 건물중이 높고 눈의 크기가 크고 많아 이듬해 생산량이 높을 것으로 판단된다. 따라서 ‘Atlas’ 품종은 국내에서 재배 중인 다른 품종과 마찬가지로 비가림하우스 재배에 의해 생산량을 높일 수 있을 것으로 생각된다.

    - COLLAPSE
    April 2020
  • Research Article

    Vertical Pillar Type and Fruit Setting Method for Vertical Cultivation of Small-Sized Watermelon

    소형과 수박 수직재배를 위한 지주유형 및 착과방법

    Eun-Jeong Kim, Sol-Ji Noh, Young-Sang Kim, Yu-min Jeon, Sung-Won Park, Tae-Il Kim, Yoon-Sun Huh, and Taek-Gu Jeong

    김은정, 노솔지, 김영상, 전유민, 박성원, 김태일, 허윤선, 정택구

    Korean consumers prefer various types of watermelons such as the seedless or colored ones, but, nowadays, large-sized watermelons are produced more than ...

    한국의 수박 소비형태는 씨없는 수박, 컬러 수박과 같은 다양한 종류의 수박 품종을 선호하고, 대형과에서 소형과로 변화되고 있다. 이러한 소비자의 요구에 대응하기 위해 ...

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    Korean consumers prefer various types of watermelons such as the seedless or colored ones, but, nowadays, large-sized watermelons are produced more than the small-sized ones. In order to satisfy all consumer needs, this research developed a vertical cultivation method that enables mass-production of high-quality small-sized watermelons. The watermelon varieties used in this study are “Lycofresh No. 2” (diploid) and “Black Boy” (triploid), and the vertical pillar types were evaluated after dividing them into different types, such as I-type, Ո-Type, semi-runner type and runner type. As for the planting distances, plant growth yields were compared among the following categories: 20 cm, 30 cm, and 40 cm. The fruit setting method was performed for female flowers No. 2 (12 - 16), No. 3 (19 - 23), and No. 4 (26 - 30) node positions. As a result, small-sized watermelon vertical cultivation technology was established as follows. Using the I-type, the cultivations were planted at a distance of 20 cm. A stem was cultivated using two stalks and an induction net. The fruit setting position was the third female flower, and the shoot apex was removed through a pruning method at the end of the stem, 2 days before the female flowers bloomed. The vertical cultivation method developed in this study makes it possible to cultivate 3,000 plants/10 acres in a 6 m single span-type greenhouse. Thus, the marketable yield of ‘Lycofresh No.2’ increased 2.6 times and that of ‘BlackBoy’ increased 2.9 times, compared with the conventional cultivation type (runner type), in a cultivation area of 10 acres. Growing small-sized watermelons with I-type vertical cultivation increases the yield and, consequently, the farmer’s income. In addition, the change of posture from squatting to standing also improves the conditions of labor to them. Altogether, our results indicate that our procedure represents a more efficient and convenient cultivation method.


    한국의 수박 소비형태는 씨없는 수박, 컬러 수박과 같은 다양한 종류의 수박 품종을 선호하고, 대형과에서 소형과로 변화되고 있다. 이러한 소비자의 요구에 대응하기 위해 고품질 소형과 수박을 대량으로 생산할 수 있는 수직재배방법을 개발하였다. 본 연구에서 사용된 수박 품종은 ‘리코후레쉬2호(2배체)’와 ‘블랙보이(3배체)’이고, 수직지주유형은 I자형, ∩자형, 반포복형, 포복형으로 나누어 조사하였다. 주간거리는 20cm, 30cm, 40cm로 나누어 생육과 수량을 비교하였다. 착과화방(착과절위)은 2(12 ‑ 16), 3(19 ‑ 23), 4(26 ‑ 30)번 암꽃으로 각 암꽃에 1과를 착과시켰다. 연구결과 소형과 수박 수직재배기술은 다음과 같다. 수직재배 지주형태는 I자형이고, 주간거리는 20cm로 정식하여 재배하고, 줄기는 절화망을 사용하여 두 줄기 유인재배 하였다. 착과는 3번 암꽃에 수정시키고, 적심방법은 3번 암꽃이 피기 2일 전 줄기 끝의 생장점을 제거하는 것이다. 이번 연구에서 개발된 수직재배법으로 재배할 경우 6m 폭의 단동형 비닐온실에 3,000주/10a가 재식 된다. 그 결과 10a의 재배면적에서 상품성 있는 수량은 포복재배와 비교하여 ‘리코후레쉬2호’는 2.6배, ‘블랙보이’는 2.9배 증가했다. 소형과 수박을 I자형 수직 재배법으로 재배할 경우 규격과를 대량 생산할 수 있어 농가 소득이 증대된다. 또한 쪼그려 앉아 하는 관행 포복재배에 비해 서서 하는 작업으로 노동형태가 개선되어 노동강도가 낮아져 작업효율이 향상될 것으로 사료된다.

    - COLLAPSE
    April 2020
  • Research Article

    Design Optimization of Proportional Plus Derivative Band Parameters Used in Greenhouse Ventilation by Response Surface Methodology
    Dae-Hyun Jung, Hak-Jin Kim, Joon Yong Kim, Taek-Sung Lee, and Soo Hyun Park
    Ventilation is one of the most important factors in greenhouse cultivation because the inside temperature of greenhouses rises rapidly in warm climates ... + READ MORE
    Ventilation is one of the most important factors in greenhouse cultivation because the inside temperature of greenhouses rises rapidly in warm climates, and this high temperature may be detrimental to plant growth. The ventilation system in multi-span greenhouses is often controlled by a proportional algorithm. The relationship between temperature changes in the greenhouse and ventilation is not linear. Conventional ventilation strategies mostly employ a proportional band (P-band) control, which contains various settings related to solar radiation, outside temperature, and wind velocity. In practice, these settings may have a relationship with the set ventilation temperature. However, it is difficult to find optimized settings because they must be changed according to the greenhouse location, shape, and local climate changes. In this study, we attempted to optimize the P-band parameters for outside temperature, solar radiation, and wind speed affecting greenhouse ventilation by surface response analysis. Surface response analysis was used to confirm the quadratic response of the relationship between X and Y, which was designed using the central composite design. A total of 32 experimental factors were designed and the results were analyzed by empirical tests. In addition, derivative calculations were added to respond to rapid changes of temperature in the greenhouse and used for ventilation parameters. The results showed that optimized parameters were successfully applied to temperature control and we obtained better performance than without optimized parameters, with a root mean squared error of ± 1.25°C. It is anticipated that the study results will be useful in providing the numerical guidelines for the influence factors of the ventilation control settings. The study results will be available immediately for the influence factors of the ventilation control settings. - COLLAPSE
    April 2020
  • Research Article

    Prediction of CO2 Concentration via Long Short-Term Memory Using Environmental Factors in Greenhouses
    Taewon Moon, Ha Young Choi, Dae Ho Jung, Se Hong Chang, and Jung Eek Son
    In greenhouses, photosynthesis efficiency is a crucial factor for increasing crop production. Since plants use CO2 for photosynthesis, predicting CO2 concentration is ... + READ MORE
    In greenhouses, photosynthesis efficiency is a crucial factor for increasing crop production. Since plants use CO2 for photosynthesis, predicting CO2 concentration is helpful for improving photosynthetic efficiency. The objective of this study was to predict greenhouse CO2 concentration using a long short-term memory (LSTM) algorithm. In a greenhouse where mango trees (Mangifera indica L. cv. Irwin) were grown, temperature, relative humidity, solar radiation, atmospheric pressure, soil temperature, soil humidity, and CO2 concentration were measured using complex sensor modules. Nine sensors were installed in the greenhouse. The averages of environmental factors from the nine sensors were used as inputs, and the average CO2 concentration was used as an output. In this experiment, LSTM, one of the recurrent neural networks, predicted changes in CO2 concentration from the present to 2 h later using historical data. The data were measured every 10 min from February. 1, 2017 to May 31, 2018, and missing data were interpolated with a linear method and multilayer perceptron. In this study, LSTM predicted the 2-h change in CO2 concentrations at an interval of 10 min with adequate test accuracy (R2 = 0.78). Therefore, the trained LSTM can be used to predict the future CO2 concentration and applied to efficient CO2 enrichment for photosynthesis enhancement in greenhouses. - COLLAPSE
    April 2020
  • Research Article

    Growth of Astragalus membranaceus during Nursery Period as Affected by Different Plug Tray Cell Size, Number of Seeds per Cell, Irrigation Interval, and EC Level of Nutrient Solution

    플러그 셀 크기, 셀 당 파종 립 수, 관수 간격, 양액의 EC 수준에 따른 황기의 육묘기 생육

    Hyeon Woo Jeong, Hye Min Kim, Hye Ri Lee, Hyeon Min Kim, and Seung Jae Hwang

    정현우, 김혜민, 이혜리, 김현민, 황승재

    The present study aimed to evaluate seedling quality of Astragalus membranaceus as affected by different plug tray cell size, number of seeds ...

    본 연구는 황기의 공정육묘 체계를 수립하기 위해 플러그 트레이 셀 크기, 셀 당 파종 립 수, 관수 간격, 그리고 양액의 EC 수준에 ...

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    The present study aimed to evaluate seedling quality of Astragalus membranaceus as affected by different plug tray cell size, number of seeds per cell, irrigation interval, and EC (electrical conductivity) level of nutrient solution to establish the optimal plug seedling method of A. membranaceus. For plug cell size and the number of seeds per cell treatments, 128, 200, and 288-cell plug trays were used, and 1, 2, and 3 seeds were sown in each cell in a 128-cell plug tray. Irrigation time and interval were set at 1, 2, and 3 minutes and 1 day interval, 2 days interval, and 3 days interval, respectively. The EC level of nutrient solution was set at 6 levels of 1.0, 1.5, 2.0, 2.5, 3.0, and 3.5 dS∙m-1. The seedling growth of A. membranaceus was the greatest in the 128-cell plug tray with one seed sown per cell. As concerns the irrigation interval and time, leaf area and fresh weights of shoot and root were significantly the highest in the irrigation at the interval of once a day for two minutes. The EC level of nutrient solution was the greatest in 2.0 dS∙m-1, and the seedling growth decreased when the EC level of nutrient solution was higher than 2.5 dS∙m-1. These results suggest that the optimal plug seedling method of A. membranaceus is sowing two seeds per cell using a 128-cell plug tray and supplementary planting after germination, with the irrigation at one-day interval for 2 minutes with the EC level of 2.0 dS∙m-1.


    본 연구는 황기의 공정육묘 체계를 수립하기 위해 플러그 트레이 셀 크기, 셀 당 파종 립 수, 관수 간격, 그리고 양액의 EC 수준에 따른 영향을 조사 하였다. 플러그 트레이 셀 크기 구명을 위해 128구, 200구, 288구 플러그 트레이를 사용하였으며, 셀 당 파종 립 수 구명을 위해 128구 플러그 트레이에 1, 2, 3립씩의 종자를 파종 하였다. 관수시간과 간격은 각각 1, 2, 3분 그리고 1일 1회, 2일 1회, 3일 1회를 설정하여 저면관수 하였다. 양액의 EC 수준은 1.0, 1.5, 2.0, 2.5, 3.0 그리고 3.5dS·m-1으로 6수준으로 설정하였다. 황기의 생육은 128구 트레이에서 우수하였으며, 파종 립 수에 따른 황기의 생육은 셀 당 1립에서 가장 우수하였다. 관수 간격과 관수 시간에 따른 황기의 생육은 관수간격 1일 1회, 관수시간 2분 처리에서 엽면적, 지상부와 지하부의 생체중이 유의적으로 높은 값을 나타내었다. 배양액의 EC 수준에 따른 황기의 생육은 EC 2.0dS·m-1에서 가장 우수하였으며, EC 2.5dS·m-1이상 처리에서 생육이 감소하였다. 본 연구의 결과는, 황기의 공정육묘 시 128구 플러그 트레이를 이용하여 셀 당 2립씩 파종 후 보식을 실시하고, 육묘기간 동안 양액은 1일 1회, 2분, 그리고 EC 수준은 2.0dS·m-1으로 공급하는 것이 가장 적합할 것으로 판단된다.

    - COLLAPSE
    April 2020
  • Research Article

    Effects of Dry and Wet Shipping Conditions on Quality, Vase Life, and Physiological Responses of Chrysanthemum morifolium ‘Baekma’ Cut Flowers
    Yong Seung Roh, In Kyung Kim, and Yong Kweon Yoo
    This study was conducted to identify the effects of NaOCl, ClO2, and Chrysal OVB, which are the solutions used for shipping, on ... + READ MORE
    This study was conducted to identify the effects of NaOCl, ClO2, and Chrysal OVB, which are the solutions used for shipping, on the quality and vase life of chrysanthemum ‘Baekma’ cut flowers. We also aimed to analyze correlations with vase life by analyzing chlorophyll fluorescence and spectral reflectance of cut flowers subjected to dry and wet shipping. Compared to dry shipping, the wet shipping treatments using solutions of NaOCl, ClO2, and Chrysal OVB resulted in an increase of fresh weight and flower width, with the leaves remaining in fresh states after transport for 4 days. In holding solution, the cut flowers transported with 50 mg·L-1 NaOCl had a greater fresh weight and flower diameter as well as a longer vase life of 26 days compared with dry and wet shipping conditions with tap water, ClO2, and Chrysal OVB solution. The cut flowers treated with wet shipping conditions by NaOCl had lower values of ABS/RC and DIo/RC and higher values of Fm/Fo, Fv/Fo, Fv/Fm, TRo/ABS, ETo/TRo, ETo/ABS, Pi_ABS, and ETo/RC among chlorophyll fluorescence parameters compared to those subjected to dry shipping conditions. Among the parameters, the Fv/Fm and ETo/RC exhibited statistically significant correlations with the vase life of cut flowers. In terms of spectral reflectance, the wet shipping treatment with 50 mg·L-1 NaOCl resulted in lower values of CRI, G, MCARI, NPCI, and SIPI that represent the ratio of contents of carotenoid and chlorophyll compared to the dry shipping treatment, whereas SRPI resulted in higher values. Among these parameters, the CRI, SRPI, and NPCI manifested a statistically significant correlation with vase life of cut flowers. Therefore, it was concluded that wet shipping with 50 mg·L-1 NaOCl helped maintain quality and vase life of cut flowers of chrysanthemum ‘Baekma’ compared to dry or wet shipping with Chrysal OVB and ClO2 that were used commercially. In addition, the Fv/Fm and ETo/RC, representing chlorophyll fluorescence, and CRI, SRPI, and NPCI, representing spectral reflectance, were found to be feasible indicators predicting the vase life of cut flowers. - COLLAPSE
    April 2020
  • Research Article

    Comparison of Postharvest Quality of Three Hardy Kiwifruit Cultivars during Shelf Life and Cold Storage
    Chul-Woo Kim, Narae Han, Hyowon Park, and Uk Lee
    This study investigated postharvest fruit quality in ‘Cheongsan’, ‘Daebo’, and ‘Daeseong’ hardy kiwifruit cultivars during shelf life and cold storage. Fruits of ... + READ MORE
    This study investigated postharvest fruit quality in ‘Cheongsan’, ‘Daebo’, and ‘Daeseong’ hardy kiwifruit cultivars during shelf life and cold storage. Fruits of the cultivars were harvested for commercial maturity based on soluble solids content. The fresh weight of ‘Daebo’ at harvest was two times that of ‘Daeseong’ and ‘Cheongsan’. The harvested hardy kiwifruit generally showed an increase in soluble solids content, a decrease in firmness, and deterioration of fruit quality as they ripened, regardless of the storage regime. The firmness of ‘Cheongsan’, ‘Daebo’, and ‘Daeseong’ was 19.9, 20.5, and 33.9 N at harvest, respectively, and decreased to 5.0 N in ‘Cheongsan’ and ‘Daebo’ after 5 days of shelf life. However, ‘Daeseong’ maintained higher firmness than ‘Cheongsan’ and ‘Daebo’ over the whole storage period. After 14 days in cold storage, the firmness of ‘Cheongsan’, ‘Daebo’, and ‘Daeseong’ was 10.9, 6.5, and 16.6 N, respectively, decreasing to 8.1, 3.7, and 4.0 N, respectively, after 35 days in cold storage. Stored ‘Cheongsan’ was considered unmarketable after 3 days of shelf life owing to fruit softening and fungal decay. Cold storage effectively delayed the incidence of decay; however, marketability of ‘Cheongsan’ fruit decreased after 21 days in storage because the fruit became shriveled and pitted. The ‘Daeseong’ fruit were still considered marketable following 70 days in cold storage. - COLLAPSE
    April 2020
  • Research Article

    Effect of Preharvest Ca-chitosan Application on Postharvest Quality of ‘Garmrok’ Kiwifruit during Cold Storage
    H. M. Prathibhani C. Kumarihami, Gyeong Hwan Cha, Jin Gook Kim, Hong Lim Kim, Mockhee Lee, Yong-Bum Kwack, Jung Gun Cho, and Joonyup Kim
    We evaluated the influence of preharvest calcium chitosan (Ca-chitosan) on the physicochemical properties of ‘Garmrok’ kiwifruit (Actinidia deliciosa) during postharvest cold storage ... + READ MORE
    We evaluated the influence of preharvest calcium chitosan (Ca-chitosan) on the physicochemical properties of ‘Garmrok’ kiwifruit (Actinidia deliciosa) during postharvest cold storage at 0°C. Preharvest treatment of kiwifruit with Ca-chitosan increased the fruit weight but had no significant effects on fruit size at harvest. The Ca-chitosan-treated kiwifruit at harvest displayed a significantly lower (p < 0.05) respiration rate (11.9 mg·kg-1·h-1), possibly due to the selective permeability of Ca-chitosan for respiratory gases. In addition, preharvest treatment of Ca-chitosan delayed the loss of firmness in kiwifruit during cold storage. Furthermore, preharvest Ca-chitosan-treated kiwifruit had the significantly lowest (p < 0.05) soluble solids content (SSC) and the significantly highest (p < 0.05) titratable acidity (TA) at harvest, indicating that Ca-chitosan as a biostimulant can be used as a maturity-delaying agent to prolong the postharvest life of kiwifruit. In this study, we demonstrate that preharvest treatment of Ca-chitosan has a positive effect on the overall quality of kiwifruit during cold storage, suggesting a new way to extend the postharvest life of kiwifruit. - COLLAPSE
    April 2020
  • Research Article

    Changes in Quality Factors of ‘Honey One’ Melon during Storage at Different Temperature

    ‘하니원’ 멜론 수확후 저장온도에 따른 품질 변화

    Jung-Soo Lee, Min Sun Chang, and Cheon Soon Jeong

    이정수, 장민선, 정천순

    The optimal temperature for storage was investigated to maintain the freshness of ‘Honey One’ melon. The melons were harvested on June 28 ...

    본 연구에서는 ‘하니원’ 멜론 수확후 선도유지를 위하여 저장온도를 달리하여 저장 중 품질변화를 분석하고, 적정 저장온도를 구명하고자 하였다. 멜론은 강원도 춘천시에서 재배된 국산 ...

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    The optimal temperature for storage was investigated to maintain the freshness of ‘Honey One’ melon. The melons were harvested on June 28, 2017 at the Chuncheon area in Gangwon Province, Korea. Three samples were packaged in corrugated box and were stored at 0, 5, 10, 15, and 20°C. The melon stored at 20°C showed the highest weight loss difference of up to 2.1%, while the samples stored at 0°C and 5°C showed the lowest weight loss. The melon stored at 20°C changed pulp color rapidly during storage. The low storage temperatures (0°C and 5°C) effectively delayed the pulp softening and respiration rate of melon. A longer storage period decreases the hardness of melon. During six days of storage, the hardness of ‘Honey One’ melon at 20°C went down from 4.7 N up to 1.5 N. Soluble solid (SS) and free sugar contents did not change regardless of the storage temperatures. The sensory evaluation of sweetness and overall acceptability showed the highest value for melons stored at 5°C. The results suggested that optimum storage temperature of ‘Honey One’ melon to maintain its freshness was at 5°C.


    본 연구에서는 ‘하니원’ 멜론 수확후 선도유지를 위하여 저장온도를 달리하여 저장 중 품질변화를 분석하고, 적정 저장온도를 구명하고자 하였다. 멜론은 강원도 춘천시에서 재배된 국산 품종 네트멜론인 ‘하니원’으로 수확후 0, 5, 10, 15 및 20°C에서 저장하면서 생체중량감소율, 가용성고형물, 경도, 색도, 호흡률 및 관능 특성 등을 조사하였다. 생체중량감소율은 저장 9일째 20°C에서 저장한 멜론이 2.1%로 가장 높았으며, 저장온도가 낮을수록 중량감소가 적었다. 가용성고형물 함량은 저장 초기 멜론이 14.8°Brix였으며 저장기간 동안 큰 변화는 없었다. 경도는 저장기간이 길어질수록 전반적으로 감소하였으며, 특히 20°C에 저장한 멜론은 저장 6일째 4.7N에서 1.5N으로 급격히 감소하였다. 과육의 색 변화 정도를 나타내는 △E 값은 저장기간이 길어질수록 증가하였으며 저장온도가 낮을수록 색 변화가 적었다. 저장수명과 품질평가에서 5 및 0°C에서 저장한 멜론이 비슷한 경향을 보였으나, 관능평가에서 5°C에서 저장한 멜론의 맛과 전반적인 기호도가 0°C에서 저장한 멜론보다 다소 높은 것으로 나타났으며, 0°C에서는 동해 피해가 관찰되었다. 따라서 ‘하니원’ 멜론은 수확후 5°C에서 저장하는 것이 품질 및 선도유지에 효과적이라 판단된다.

    - COLLAPSE
    April 2020
  • Research Article

    Relationship between Cultivation Environment and Postharvest Quality of Cut Rose ‘Lovely Lydia’

    절화 장미 ‘Lovely Lydia’의 재배 환경과 수확 후 품질과의 관계

    Ja-Hee Lee, Ji-Won Yoon, Sang-Im Oh, and Ae-Kyung Lee

    이자희, 윤지원, 오상임, 이애경

    The aim of this study was to analyze the effects of the cultivation environment in different seasons on the quality and longevity ...

    본 연구는 스프레이 절화 장미 장미 ‘Lovely Lydia’(Rosa hybrida L. ‘Lovely Lydia’)의 계절에 따른 재배환경과 그에 따른 절화 장미의 품질 ...

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    The aim of this study was to analyze the effects of the cultivation environment in different seasons on the quality and longevity of the cut spray rose ‘Lovely Lydia’ (Rosa hybrida L.). According to our analysis, the high outdoor temperature in the summer led to a higher temperature inside the greenhouse. The relative humidity (RH) also increased because of the mist spray that was used to lower the temperature. These changes in the cultivation environment resulted in shorter longevity and lower quality of cut roses during summer compared to that of other seasons. The average minimum temperature during summer was 19.82°C, which was higher than the optimum night temperature of 15 ‑ 18°C; thus, the initial characteristics of cut flowers were affected by the high minimum temperature, which also led to a decline in quality. Flower stem length, upper and lower flower stem diameters, fresh weight, and the number of florets were also affected by the season. Plant length was longer in spring cut roses compared to roses grown in other seasons. Analysis of the vase life of postharvest cut flowers showed that summer cut roses lasted 4.6 days, which was more than 4 days shorter than that of spring cut flowers. The vase life of cut flowers gradually increased from summer to winter and then to spring. The longer vase life of the spring roses may be related to good water status through proper stomatal function of the cut flowers. The high temperature and humid growth environment during summer limited stomata movement in the cut roses because of the moisture control, which led to less water uptake compared to other seasons. In summary, it maintains the optimum growth environment for roses, and thereby improve cut flower characteristics and quality.


    본 연구는 스프레이 절화 장미 장미 ‘Lovely Lydia’(Rosa hybrida L. ‘Lovely Lydia’)의 계절에 따른 재배환경과 그에 따른 절화 장미의 품질 및 수명을 분석하고자 수행하였다. 계절에 따른 재배환경을 분석한 결과, 여름은 외부 기온이 높기 때문에 시설 내 온도가 다른 계절보다 가장 높았으며, 높은 온도를 낮추기 위해 미스트 분무로 습도가 다른 계절에 비해 높은것으로 나타났다. 이러한 재배환경의 변화로 인해 다른 계절 보다 여름 절화 장미의 절화수명이 단축되고 품질 하락에 영향을 미친 것으로 판단된다. 또한, 여름의 최저 온도가 19.82°C로 야간 적정온도인 15 ‑ 18°C보다 크게 나타나 절화의 초기특성 및 품질 저하에 영향을 미친것으로 판단된다. 계절별 절화의 생육 특성을 조사한 결과, 총 장, 줄기 상·하부 직경, 생체중, 소화 수는 계절에 따라 영향을 많이 받는 것으로 조사되었으며, 초장은 봄 절화 장미가 다른 계절보다 긴 것으로 조사되었다. 수확 후 절화의 품질을 조사한 결과, 여름 절화 장미의 절화수명은 4.6일로 절화수명이 다소 길었던 봄 절화 장미에 비해 약 4일 이상 단축된 것으로 나타났으며, 여름 보다 겨울, 봄으로 갈수록 수명이 점차 연장되었다. 이는 봄 절화 장미가 다른 계절보다 기공 개폐가 잘 이루어져 증산 작용을 통한 수분 유지가 원활하여 품질 유지에 영향을 미친것으로 판단된다. 여름 절화 장미는 재배 시 높은 온도와 높은 습도로 인해 수분장해 등의 문제로 기공개폐가 제대로 이루어지지 않아 수분흡수량도 다른 계절 보다 가장 낮게 나타나는 것으로 조사되었다. 따라서 농가의 적정 장미 생육 환경 유지를 통해 절화의 특성 및 품질이 다소 향상될 수 있도록 재배환경 조절이 필요한 것으로 판단되었다.

    - COLLAPSE
    April 2020
  • Research Article

    Some Factors Affecting the Efficiency of Hybrid Embryo Rescue in the ‘Shiranuhi’ Mandarin
    Misun Kim, Si Hyun Kim, Ho Bang Kim, Young Chul Park, and Kwan Jeong Song
    The ‘Shiranuhi’ mandarin has attractive characteristics such as a high soluble solid content, a lack of seeds, and a rind that is ... + READ MORE
    The ‘Shiranuhi’ mandarin has attractive characteristics such as a high soluble solid content, a lack of seeds, and a rind that is easy to peel. Thus, it has been utilized as a genetic resource in citrus breeding programs. However, it has a polyembryony trait that causes problems when producing sexual hybrids. Therefore, methods need to be established to distinguish between zygotic and nucellar plants from cross offspring. In this study, the ‘Shiranuhi’ mandarin and the ‘Sanguinelli’ blood orange were crossed to produce immature embryos that were used to detect zygotic embryos at 90, 105, 125, 145, and 180 days after pollination (DAP). For germination, embryos at different developmental stages were cultured on Murashige and Skoog (MS), Murashige and Tucker (MT), and Gamborg B5 media supplemented with 500 mg·L-1 malt extract, 25 mg·L-1 adenine sulfate (ADS), 1 mg·L-1 gibberellic acid (GA3), 3% sucrose (w/v), and 0.8% phyto agar (w/v). The germination rate of immature embryos ranged from 36.4% to 74.9% depending on DAP, while germination rate was not significantly different by medium type. The rooting rate was high during the late embryo developmental stages and when there were low sucrose concentrations and high GA3 concentrations. The percentage of zygotic plants per seed was measured using simple sequence repeat (SSR) markers and averaged 12.1% for 90 DAP, 7.6% for 105 DAP, 6.8% for 125 DAP, 1.0% for 145 DAP, and 4.1% for 180 DAP. These results indicated that embryo developmental stage was the greatest factor in relation to inorganic salt, sucrose, and GA3 concentration for increasing the selection efficiency of sexual hybrids in crosses using polyembryony maternal parents by embryo rescue and SSR marker analysis. - COLLAPSE
    April 2020
  • Research Article

    Effect of Tobacco Mosaic Virus (TMV) Infection on Expression and Purification of Therapeutic Vaccine Proteins in Transgenic Plants
    Chunha Shin, Ilchan Song, Yeji Lee, So-Hyeon Baek, Dae Heon Kim, and Kisung Ko
    Plant molecular biofarming has been increasingly studied in recent decades. Many kinds of recombinant immunotherapeutic proteins have been produced in transgenic tobacco ... + READ MORE
    Plant molecular biofarming has been increasingly studied in recent decades. Many kinds of recombinant immunotherapeutic proteins have been produced in transgenic tobacco plants. However, tobacco mosaic virus (TMV) can damage tobacco plants and cause pathogenic symptoms, which affects plant biomass production. Cigarette sap solution has been used to infect TMV during tobacco cultivation. In this study, we obtained TMV-infected transgenic plants expressing a prostate- specific antigen (PSA) fused to an IgG Fc with KDEL ER retention motif (PSA-IgG FcK). The typical TMV-associated symptoms appeared and increased on plant leaves 5 days after infection. mRNA expression levels and the presence of TMV were confirmed by RT-PCR and transmission electron microscopy analyses. The expression level and purity of the target protein were not significantly different between noninfected and infected transgenic plants. TMV was not found in the purified protein samples from infected plants. Our study showed that TMV pathogen-infected plant biomass can be harvested and processed to obtain therapeutic vaccine proteins. - COLLAPSE
    April 2020
  • Research Article

    Variations of Bioactive Compound Contents and Antioxidant Capacity of Asparagus Seedlings in 23 Varieties
    Hyang Lan Eum, Tae Gyu Yi, Sae Jin Hong, and Nam-Il Park
    Antioxidant activity (DPPH and ABTS), bioactive compounds (total phenolic content, total flavonoid content, rutin, and nicotiflorin), and free amino acids were analyzed ... + READ MORE
    Antioxidant activity (DPPH and ABTS), bioactive compounds (total phenolic content, total flavonoid content, rutin, and nicotiflorin), and free amino acids were analyzed in 23 asparagus (Asparagus officinalis L.) varieties at the seedling stage 1 month after sowing. Except for nicotiflorin, the antioxidative activity and bioactive compound content were similar among five varieties (‘MAM’, ‘UC7’, ‘TEM’, ‘POM’, and ‘HEM’). ‘MAM’, ‘HEM’, ‘UC7’, ‘TEM’, and ‘GRM’ contained the most nicotiflorin among the 23 varieties. Rutin was strongly correlated with antioxidant activity, especially ABTS activity. The major amino acids in asparagus seedlings were proline, GABA, aspartic acid, and alanine. ‘ASM’, ‘GUM’, ‘MOO’, ‘AVM’, and ‘PUP’ showed the highest free amino acid contents, and they were different from the varieties with high antioxidant activity. Interestingly, the free amino acid content of ‘MAM’ was the lowest, even though this variety had the highest antioxidant activity and bioactive compound content. In contrast, ‘ASM’ showed the highest free amino acid content, while the antioxidant capacity and rutin and nicotiflorin contents in this variety were the lowest. The differences in major efficacy among the varieties of asparagus may be a main factor in variety selection by producers. - COLLAPSE
    April 2020