About This Journal

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.

 

2021 Impact Factor 0.758

 

  • Research Article

    Effects of the Propagation Method and Planting Season of Bulblets on Shoot Emergence and Bulb Enlargement in Korean Native Lilies in Sinomartagon Section
    Min Hui Kim, Jiseon Kim, Kiu Weon Kim, and Wook Oh
    This study investigated the effects of the planting season on shoot emergence and the enlargement of bulblets via three propagation methods in … + READ MORE
    This study investigated the effects of the planting season on shoot emergence and the enlargement of bulblets via three propagation methods in Korean native lilies belonging to the Sinomartagon section. One-year-old bulblets of Lilium amabile, L. cernuum, L. lancifolium, and L. leichtlinii var. maximowiczii were obtained through tissue culture, scaling, and seed propagation steps. They were divided into two groups based on the species and propagation method and planted in an open field either immediately in autumn or in spring after wet cold storage. Overall, spring planting increased the shoot emergence rate, delayed the shoot emergence date, and increased bulb fresh weight (BFW) and the bulb enlargement rate (BER) at harvest compared to autumn planting. In terms of the propagation method used to obtain bulblets, BERs were higher in the following order: seed propagation > scaling > tissue culture. Bulblet fresh weights just before planting and BFW at harvest showed an almost proportional relationship regardless of the species, whereas the slope decreased as the bulblet fresh weight exceeded 1.5 g. In terms of species, genetically close L. amabile and L. lancifolium had high BERs, and L. cernuum had a relatively low BER. In conclusion, with regard to bulb production of four Korean native species belonging to the Sinomartagon section, regardless of the propagation method used to obtain bulblets, wet cold storage without planting the bulblets in autumn and subsequently planting them in an open field or greenhouse in the spring for intensive management would be the key to bulb production. - COLLAPSE
    31 October 2022
  • Research Article

    Effects of Exogenous Organic Acids on the Growth and Antioxidant System of Cosmos bipinnatus under Cadmium Stress
    Jiani Hu, Xinyi Gao, Yajie Yue, Xiaoyu Ming, Linjie Yue, Lijuan Yang, Xue Xiao, and Xiaofang Yu
    Cadmium pollution in China’s urban green spaces is extremely severe, causing a significant increase in the risk of urban environmental pollution. Applying … + READ MORE
    Cadmium pollution in China’s urban green spaces is extremely severe, causing a significant increase in the risk of urban environmental pollution. Applying organic acids under Cd stress conditions improves the activity of the major antioxidant enzymes in the AsA-GSH cycle significantly. In this study, Cosmos bipinnatus seedlings were cultured in a nutritive medium containing 40 µmol·L-1 Cd. They were subsequently supplemented with different concentrations of citric acid and malic acid (0,0.5,1.0,2.0 mmol L-1) to analyze the roles of the organic acids in regulating the AsA-GSH cycle involved in plant resistance to Cd stress. Exogenous organic acids inhibited the growth of C. bipinnatus in a dose-dependent manner. AsA, GSH, and GR in the leaves decreased dramatically at high malic acid concentrations (2 mol L-1). The contents of GSH and GR and the APX activities showed a downward trend when the seedlings were treated with 0.5–2 mmol·L-1 of citric acid. However, AsA exhibited contrasting results under these conditions. Notably, both the antioxidant and enzyme activities were reduced considerably to a minimum when the citric acid concentration was 2 mmol·L-1. Low concentrations of exogenous acids increased the activities of APX and GR in the leaves of C. bipinnatus, thus increasing the contents of ASA and GSH. Such increases boost the efficiency of the ASA-GSH cycle in relieving the toxic effect of cadmium on C. bipinnatus. - COLLAPSE
    31 October 2022
  • Research Article

    Flowering Responses in the Cut Rose ‘Vital’ to Non-Optimal Temperatures
    Je Yeon Yeon, Sue Lee, Keum Ju Lee, and Wan Soon Kim
    Temperature stress is the primary cause of flower quality degradation of cut roses. A previous study showed that although low temperatures delay … + READ MORE
    Temperature stress is the primary cause of flower quality degradation of cut roses. A previous study showed that although low temperatures delay flowering, they can significantly increase the number of petals by promoting stamen petalody. In this study, we determined how excessively high or low temperatures influence flower development and floral organ differentiation in Rosa hybrida ‘Vital’ in the range of 10 to 35°C with three sub-ranges of optimal day/night temperatures (OT, 25/18°C), low temperatures (LT, 18/10°C; sub-optimal temperatures), and high temperatures (HT, 35/25°C; supra-optimal temperatures) and whether the differentiation is related to flowering function gene expression. The flowering time of shoots in OT (45 days) was delayed by 96% in LT (88 days) but accelerated by 31% in HT (31 days). However, the flower quality response was opposite. The flowers became larger and longer with additional biomass accumulation during the extended flowering period in LT. In addition, floral organ differentiation was suppressed under LT and HT stress conditions. Notably, HT stress reduced the formation of whole floral organs by 61.4%; however, LT stress stimulated petal formation at a rate of 9.8% and inhibited stamen formation by 1.8%. A quantitative real-time polymerase chain reaction analysis revealed that both RhAP1 (A-function gene) and RhAG (C-function gene) play essential roles in determining the number of petals, partly in association with RhAP3 (B-function gene). Our results highlight the impact of temperature stress on rose flower development and petal number determination, as determined by the expression of flowering function genes. - COLLAPSE
    31 October 2022
  • Research Article

    Exogenous Brassinosteroids Regulate Mango Fruit Set through Inflorescence Development and Pollen Fertility
    Teerapat Tepkaew, Ornusa Khamsuk, Jenjira Chumpookam, Weerasin Sonjaroon, and Kanapol Jutamanee
    Fruit set reduction is currently an important issue with regard to mango cultivation due to pollen infertility. Brassinosteroids (BRs) reportedly promote plant … + READ MORE
    Fruit set reduction is currently an important issue with regard to mango cultivation due to pollen infertility. Brassinosteroids (BRs) reportedly promote plant reproductive development, which is considered to be a strategy for reducing fertilization failures due to infertile pollen. In this study, 24-epibrassinolide (EBR), a natural brassinosteroid, and 7,8-dihydro-8α-20-hydroxyecdysone (DHECD), a brassinosteroid mimic, were applied to mango inflorescence to evaluate the effects of EBR and DHECD on inflorescence bud development and pollen fertility. Both BRs were sprayed at amounts of 0.01 or 0.1 µM when the inflorescence buds had developed to the ‘large bud swell’ stage. The results demonstrated that exogenous DHECD and EBR improved inflorescence bud development and reduced the percentage of malformed inflorescence. Application of the BRs increased the inflorescence length, the total number of flowers per inflorescence, the pollen viability, and the fruit set level. In addition, DHECD enhanced pollen germination in the pistil by elevating the pollen enzyme activities of α-amylase, Ca2+-ATPase, and polymethylesterase. The 0.1 µM DHECD application effectively improved both inflorescence bud development and pollen enzyme activity. A certain concentration of DHECD showed potential similar to EBR. It was concluded that EBR and DHECD can play effective roles in regulating fruit set through pollen fertility and can help with the problem of low fruit set outcomes in mango. - COLLAPSE
    31 October 2022
  • Research Article

    Pollen Germination Characteristics under Temperature and Relative Humidity Treatments for Artificial Pollination of Apples

    온도와 습도처리에 따른 사과 인공수분용 화분의 발아 특성

    Jingi Yoo, Cheol Choi, Jung-Geun Kwon, and In-Kyu Kang

    유진기, 최철, 권중근, 강인규

    Artificial pollination is commonly used to increase the amount and quality of apple production because inclement weather during flowering adversely affects the …

    국내에서는 사과 개화기에 이상기후로 인하여 결실불량이 문제가 되고 있어 사과 품질과 생산성을 향상시키기 위하여 인공수분을 시행하고 있으나 기상환경의 변화에 따라 그 효과가 …

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    Artificial pollination is commonly used to increase the amount and quality of apple production because inclement weather during flowering adversely affects the apple fruit set in Korea. However, the effectiveness of artificial pollination depends on meteorological conditions. Thus, this study was carried out to investigate the effects of temperature (0, 5, 10, 15, 20, 25 and 30°C) and relative humidity (30, 50 and 80%) on the pollen germination rate and pollen tube growth of ‘Hongro’, ‘Tsugaru' or mixed ‘Crabapple’, which were used to pollinate ‘Fuji’ apple. Both the pollen germination rate and pollen tube growth were better at 20 and 25°C than at any other temperature. Temperature pretreatment had a significant influence on pollen germination. High germination rates (58.2–72.4%) were obtained at 15–30°C with ‘Tsugaru’ and ‘Hongro’ pollen, but sharply decreased to 34.8% and 40.3% at 35°C, respectively. Mixed ‘Crabapple’ pollen showed a pollen germination rate of 70.6–79.5% at a temperature of 15–30°C and a germination rate of 58.4% at 35°C. When ‘Crabapple’ pollen was applied liberally to king flowers of ‘Fuji’ and ‘Hongro’ under different relative humidity treatments, a higher relative humidity resulted in greater pollen tube elongation based on pollen tubes that reached the base of the style. The number of pollen tubes that reached the base of the style in ‘Fuji’ increased to 3.69 at 80% compared to 2.21 at 30% relative humidity. Similarly, the number pollen tubes reaching the base of the style in ‘Hongro’ was 5.78 at 80% relative humidity.


    국내에서는 사과 개화기에 이상기후로 인하여 결실불량이 문제가 되고 있어 사과 품질과 생산성을 향상시키기 위하여 인공수분을 시행하고 있으나 기상환경의 변화에 따라 그 효과가 다르게 나타나고 있다. 따라서 ‘후지’ 사과에 수분이 가능한 사과재배 품종인 ‘홍로’와 ‘쓰가루’ 사과의 화분과 혼합한 꽃사과 품종의 화분을 채취하여 온도 조건 및 상대습도 처리에 따른 화분발아율과 화분관 신장에 미치는 영향을 분석하였다. ‘쓰가루’, ‘홍로’ 및 혼합된 ‘꽃사과’ 품종들의 화분 모두 15°C이하와 30°C에서는 화분발아율과 화분관 신장이 저조하였으나, 20°C와 25°C 조건에서는 화분발아율과 화분관 신장이 우수하였다. 인공수분용 화분을 특정 온도에서 5시간 방치한 후 화분발아율을 측정한 결과, ‘쓰가루’와 ‘홍로’ 화분은 15–30°C 사이에서는 58.2%부터 72.4% 까지의 높은 발아율을 보였고, 35°C에서는 각각 34.8%와 40.3%로 급격히 감소하였다. 혼합된 ‘꽃사과’ 품종의 화분은 15–30°C 사이의 온도에서 70.6%부터 79.5% 사이를 보였고, 35°C에서는 58.4%의 화분발아율을 보였다. 그리고 ‘후지’와 ‘홍로’ 품종의 중심화에 ‘꽃사과’ 화분을 인공수분한 후 상대습도에 따른 화분관 신장 정도를 보면, 상대습도가 높을수록 화분관 신장이 우수하였고, 화분관 수도 ‘후지’의 경우 습도 30%(2.21개)에 비하여 80%(3.69개)에서 증가하였고, ‘홍로’의 경우도 동일한 경향으로 상대습도가 80%(5.78개)일 때 30%(2.35개)에 비하여 화분관 신장이 매우 우수하였다.

    - COLLAPSE
    31 October 2022
  • Research Article

    Planting Density and Application of BA for the Production of Well-feathered Bi-axis Apple Trees

    사과 우량 2축 측지묘목의 경제적 생산을 위한 적정 재식거리와 BA처리 방법

    In-Hee Park, Su-Gon Han, Woo-Jin Hong, Jong-Seob Lee, Na-Kyoung Hong, and Tae-Myung Yoon

    박인희, 한수곤, 홍우진, 이종섭, 홍나경, 윤태명

    In order to produce bi-axial feathered apple trees economically and stably, unsaleable, low-quality whip apple trees were planted at different density levels …

    2축의 우량측지묘목을 경제적으로 생산하기 위하여 소질이 떨어져 판매가 어려운 1년생 회초리묘목을 상이한 재식거리로 심고 절단하여 2축을 세우고 BA 살포 주기와 횟수를 달리하여 …

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    In order to produce bi-axial feathered apple trees economically and stably, unsaleable, low-quality whip apple trees were planted at different density levels and headed ca. 3 cm above the grating union, with two shoots raised for the axes. When the shoots reached a height of about 60 cm, BA was sprayed at different intervals and times. In terms of the planting distance, increasing the inter-row distance from the conventional distance of 1.0 m to 1.2 m did not have a significant effect on the tree height, scion diameter or number of feathers per axis. Nor did it increase the yield rate of saleable bi-axial apple trees. The inter-row spacings was 0.3, 0.4, and 0.5 m, and the scion diameter tended to be somewhat thicker as they were planted more widely, but there were no significant differences in the tree height or number of feathers per axis. In the 600 ppm BA treatment to induce feathers, among the spraying intervals of 7, 10, and 14 days, the 10-day interval led to the highest number of feathers per axis (16.1). Regarding the number of BA sprays, as the number of BA sprays was increased to three times instead of one or two times, more feathers were induced. In conclusion, in order to produce biaxial geodesic seedlings economically, the strategy of planting at a planting distance of 1.0 × 0.3 m and spraying BA three times at 10-day intervals is most appropriate.


    2축의 우량측지묘목을 경제적으로 생산하기 위하여 소질이 떨어져 판매가 어려운 1년생 회초리묘목을 상이한 재식거리로 심고 절단하여 2축을 세우고 BA 살포 주기와 횟수를 달리하여 2축 묘목을 생산하는 방법으로 본 시험을 실시하였다. 재식거리에 있어서 열간거리를 관행의 1.0m를 1.2m로 더 넓힌다고 수고와 측지 수에 있어서 유의성 있는 차이가 있거나 2축 묘목 득묘율이 유의하게 높아지지 않았다. 주간거리는 0.3, 0.4, 0.5m로 넓게 심을수록 접수의 줄기는 다소 굵어지는 경향을 보였으나 수고, 줄기 직경과 측지 수에 있어서는 뚜렷한 차이가 나타나지 않았으며 2축 묘목 소질이나 묘목 득묘율에서도 비슷한 경향이었다. 측지 발생을 위한 600ppm BA 처리에 있어서는 살포 간격 7, 10, 14일 중에는 10일 간격이 축당 측지 수가 16.1개로 가장 많았고, 살포 횟수에 있어서는 회수가 많을 수록 측지발생이 현저하게 많은 경향을 보였다. 결론적으로 2축 측지 묘목 생산을 경제적으로 생산하기 위해서는 재식거리 1.0 × 0.3m로 심고 BA를 10일 간격으로 3회 살포하는 방법이 적합하였다.

    - COLLAPSE
    31 October 2022
  • Research Article

    Analysing Dynamics of Plant Height of Standard Chysanthemum ‘Baekma’ Using Non-linear Regression Models

    스탠다드 절화국화 ‘백마’의 다이내믹 초장 비선형 회귀 모델 분석

    Jeong Hyun Lee, Gyu Hyeon Park, and Min-Soo Kim

    이정현, 박규현, 김민수

    The purpose of this research was to find the best model (in term of goodness of fit) among Gompertz, Logistic and Richards …

    본 연구는 정식 시기와 장일처리 기간이 다른 스탠다드 절화국화 초장의 변화를 묘사하는 방법으로 Gompertz, Logistic 및 Richards 생장모형 중 가장 적합한 모형을 …

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    The purpose of this research was to find the best model (in term of goodness of fit) among Gompertz, Logistic and Richards growth models for the variation in plant height of standard cut chrysanthemum plants at different planting dates with different long-day periods. The measured plant height with time was well described by a simple sigmoidal model with a higher R2 (>0.97) than that of non-linear regression models. The estimated parameters of the simple sigmoidal model were easier to interpret; they were relative growth rate, maximum plant height, and the number of days after planting to reach the maximum stem elongation rate. The derivative of these models could be used to calculate the absolute stem elongation rate with time, which tended to follow a bell-shaped curve for Gompertz, Logistic, and Richards growth functions. However, the function without an intercept showed large variations in standardized residuals and bias against the predicted value even though it had a high R2 value. The model with an intercept showed highly stable standardized residuals and normality with the three growth functions. Based on the homogeneity of standardized tests and the values of Skewness and Kurtosis as well as the non-significance probability of Kolmogorov-Smirnov and Shapiro-Wilk, the Gompertz growth model with an intercept was a highly suitable function for the estimation of measured plant height of standard cut chrysanthemum ‘Baekma’. This model summarized biological parameters well, such as the dynamics of stem elongation rate and days after planting to reach the maximum growth rate with different planting dates, compared with the other sigmoidal growth models.


    본 연구는 정식 시기와 장일처리 기간이 다른 스탠다드 절화국화 초장의 변화를 묘사하는 방법으로 Gompertz, Logistic 및 Richards 생장모형 중 가장 적합한 모형을 선택하고자 하였다. S자형 생장곡선을 묘사할 수 있는 세 모델을 이용하여 시계열에 따른 초장의 생장량을 평균 97%이상 높은 결정계수로 설명하였고, 추정된 매개변수인 곡선의 변화율, 점근선의 최대값, 최대생장율에 도달하는 정식 후 일수를 통해 측정된 초장의 신장량을 잘 묘사할 수 있었다. Gompertz, Logistic, 그리고 Richards 생장모형의 도함수는 정식 후 일수에 따른 절대생장율을 계산할 수 있었으며, 세 모델의 절대생장율은 종모양의(bell-shaped) 형태를 나타냈다. 절편이 없는 생장모델은 높은 결정계수에도 불구하고, 추정값의 표준화된 잔차들은 편의한 분포를 나타냈다. 절편을 추가한 Gompertz, Logistic 및 Richards 생장함수는 매우 안정적으로 표준화된 잔차들의 정규성이 높게 나타났다. 세 개의 시그모이드 생장모델 중 절편이 있는 Gompertz 생장모형은 Skewness와 Kurtosis는 표준화된 잔차의 정규성이 인정되었고, Kolmogorov-Smirnov와 Shapro-Wilk 검정에서 유의성이 인정되지 않아, 정식 일수와 장일처리 기간이 상이한 스탠다드 절화국화 ‘백마’의 측정된 초장을 분석하기 위한 매우 적합한 모델로 판단되며, 다이내믹한 초장의 생장율, 최대생장율에 필요한 정식 일 수와 같은 생물학적 매개변수들을 이용하여 측정값을 정량적으로 잘 요약할 수 있었다.

    - COLLAPSE
    31 October 2022
  • Research Article

    Growth Environmental Factors and Fruit Enlargement of Seedless Watermelon according to Directions of Single-Span Greenhouse

    단동 온실 방향에 따른 씨 없는 수박의 생육 환경 요인 및 과실 비대

    Seung Mi Woo, Ga Yeong Kim, Jeong Hyeon Lim, Ju Hyung Jeong, Seung Hyun Cho, Byung Koo Ahn, Eun Young Lee, Jong Hyang Bae, and Ho Cheol Kim

    우승미, 김가영, 임정현, 정주형, 조승현, 안병구, 이은영, 배종향, 김호철

    This study was conducted to investigate the differences in internal environmental factors, photosynthetic factors, and increment of fruit volume according to direction …

    본 연구는 2021년 7월 8일부터 8월 4일까지 온실 방향에 따른 온실 내부 환경요소, 광합성 요소, 그리고 이에 따른 과실 비대량 등의 차이를 …

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    This study was conducted to investigate the differences in internal environmental factors, photosynthetic factors, and increment of fruit volume according to direction of the greenhouse grown watermelon (Citrulls lanatus). The greenhouse was single-span type, and the directions were east-west (EW) and southeast-northwest (SENW). During research period, daily average intensity of solar radiation (ISR), air temperature, and air temperature in daytime were all significantly higher in SENW than in the EW. The solar radiation intensity in the SENW from sunrise to about 13:00 was maintained higher than in EW greenhouse, and accordingly, daily integrated solar radiation was maintained high during the research period. In near plant leaves on fruiting part at around 11 am, ISR in the SENW was twice as high as 408.13 µmol·m-2·s-1 in EW. And transpiration rate was 6.53 mmol·m-2·s-1 in the SENW greenhouse. It was significantly higher than 4.75 mmol·m-2·s-1 in EW. The difference between leaf temperature and air temperature values (DV) was significantly higher in EW than in SENW. Leaf temperature and DV showed a high correlation with vapor pressure deficit (R = 0.904**, 0.799*), and ISR showed a high correlation with transpiration rate (R = 0.856**). And ISR affected leaf temperature, and leaf temperature affected DV. The total increment of fruit volume during 4 weeks was 6,226.8 cm3·fruit-1 in SENW, which was about 1.5 times higher than that of 4,755.3 cm3·fruit-1 in EW. This result was greatly affected by daily integrated solar radiation. Therefore, direction of single-span greenhouse in summer cultivation affects amount and intensity of solar radiation and fruit enlargement, and the direction of south-north is more suitable than that of east-west.


    본 연구는 2021년 7월 8일부터 8월 4일까지 온실 방향에 따른 온실 내부 환경요소, 광합성 요소, 그리고 이에 따른 과실 비대량 등의 차이를 알아보기 위해서 수행되었다. 온실은 전북 고창에 위치한 수박 재배 단동 온실(폭 × 높이 × 길이 = 6.0 × 3.3 × 100m)로 방향은 동서(동 → 서, EW)와 남동북서(남동 → 북서, SENW)였다. 과실 비대기 4주 동안 일평균 광도, 일평균 기온, 일평균 주간온도 모두 SENW 온실에서 EW 온실 보다 유의하게 높았다. 일중 광도는 일출부터 13:00 정도까지 SENW 온실에서 EW 온실보다 높게 유지되었고, 이에 따라 조사기간 동안 일평균 적산일사량도 높게 유지되었다. 오전 11시경 착과 부위 엽 근처의 평균 광도는 SENW 온실에서 EW 온실의 408.13µmol·m-2·s-1보다 2배정도 높았고, 평균 증산속도도 SENW 온실에서 6.53mmol·m-2·s-1로 EW의 4.75mmol·m-2·s-1보다 유의하게 높았다. 엽온 - 기온은 SENW 온실에서 –6.16°C로 EW 온실의 –8.46°C보다 작았고, 두 온실 간 유의한 차이를 나타내었다. 엽온과 엽온 - 기온은 수증기압포차(R = 0.904**, 0.799*), 광도는 증산속도(R = 0.856**)와 높은 상관성을 나타내었다. 그리고 광도는 엽온에, 엽온은 엽온 - 기온에 영향을 유의하게 주었다. 4주 동안 총 과실 체적 증가량은 SENW 온실에서 6,226.8cm3·fruit-1로 EW 온실의 4,755.3cm3·fruit-1보다 약 1.5배 많았고, 그것은 적산일사량의 영향을 크게 받았다. 따라서 여름철에 수박을 재배하는 단동 온실의 방향은 광 환경 및 과실 비대에 영향을 주고, 온실 방향은 동서보다 남북이 적합할 것으로 판단된다.

    - COLLAPSE
    31 October 2022
  • Research Article

    Effect of Salicylic Acid and 1-Methylcyclopropene Treatments on Fruit Quality and Cell Wall Hydrolases of ‘Hwangok’ Apples During Cold and Shelf-life Storage
    Jingi Yoo, Hye-Won Kwon, Jung-Geun Kwon, Nay Myo Win, and In-Kyu Kang
    We evaluated the effects of salicylic acid (SA) and 1-methylcyclopropene (1-MCP) treatments on fruit quality and the softening-related cell wall materials and … + READ MORE
    We evaluated the effects of salicylic acid (SA) and 1-methylcyclopropene (1-MCP) treatments on fruit quality and the softening-related cell wall materials and hydrolase activities of ‘Hwangok’ apples during cold storage and cold storage plus seven days under shelf-life storage conditions. Fruits were dipped in a SA solution (3 mM), fumigated with 1-MCP (1 µL·L-1), or subjected to a combined SA+1-MCP treatment, followed by cold storage (0°C) and seven-day shelf-life storage (20°C) for up to 180 and 180 + 7 days. Under both storage conditions, fruits treated with 1-MCP and SA+1-MCP exhibited higher firmness and titratable acidity levels as well as lower internal ethylene concentrations, respiration rates, and weight loss values than the controls and SA-treated apples. The peel color indicators a* and b* were also lower in 1-MCP- and SA+1-MCP-treated apples than in controls and SA-treated apples. Total sugar and uronic acid levels were increasingly solubilized, and the activities of cell wall hydrolases, except for that of β-xylosidase, were higher in controls and SA-treated fruits than in 1-MCP and SA+1-MCP-treated apples. Therefore, our results suggest that the 1-MCP treatment is effective for maintaining fruit quality and extending the shelf life of ‘Hwangok’ apples during cold storage and under shelf-life storage conditions. The SA treatment alone did not extend the storage life of ‘Hwangok’ apples. - COLLAPSE
    31 October 2022
  • Research Article

    Development and Application of Polymorphic SSR Markers in Luffa cylindrica
    Junjie Cui, Zhen Lv, Tianwen Yang, Jing Wang, Yu Hong, and Yi Cao
    Two published genomes of Luffa cylindrica, ‘SG2019’ and ‘SO3’, were used to develop polymorphic SSR markers for L. cylindrica by searching … + READ MORE
    Two published genomes of Luffa cylindrica, ‘SG2019’ and ‘SO3’, were used to develop polymorphic SSR markers for L. cylindrica by searching and comparing the SSR motifs at the same site in the two genomes. Based on the SSR search conditions and primer design criteria, 2130 polymorphic SSR markers for L. cylindrica were developed. The main motif type was dinucleotide, accounting for 80.28% of the total; the main motif units were AT/AT and AAT/ATT, accounting for 87.80% of the total. Furthermore, 40 polymorphic SSR markers developed in this study were randomly selected and amplified in 24 Luffa samples. According to the results, the 40 polymorphic SSR markers showed an amplification rate of 100% and a polymorphism rate of 80%. Cluster analysis classified the 24 Luffa samples into two main groups, L. cylindrica and L. acutangula. Overall, the polymorphic SSR markers developed in this study display a high polymorphic rate and reliable utilization value. - COLLAPSE
    31 October 2022
  • Research Article

    Role of Phenolic Compounds in Root Induction of Virus-free Apple Rootstocks and Scions
    Jong-Eun Han, Bo-Min Kwon, Hosakatte Niranjana Murthy, Cheol-Seung Jeong, and So-Young Park
    The objective of the current study was to identify and quantify endogenous phenolic compounds in easy-to-root M.9 and M.26 rootstocks and difficult-to-root … + READ MORE
    The objective of the current study was to identify and quantify endogenous phenolic compounds in easy-to-root M.9 and M.26 rootstocks and difficult-to-root cultivars ‘Hongro’ (HR) and ‘Fuji’ (FJ) (scions) of apple (Malus domestica Borkh.) during in vitro rooting of shoots for 40 days in culture. Phloretic acid, coumaric acid, salicylic acid, chlorogenic acid, catechin hydrate, hesperetin, rutin, quercetin, and biochanin were the major endogenous phenolic compounds detected in the apple shoots by high-performance liquid chromatography (HPLC). Among the various phenolic compounds, chlorogenic acid was most abundant in shoots, favoring the induction and growth of adventitious roots from in vitro shoots. In contrast, salicylic acid was another phenolic acid that was reduced during the culture of shoots in the easy-to-root rootstocks (M.9 and M.26). However, salicylic acid levels remained constant or increased throughout the culture in the difficult-to-root cultivars (HR and FJ). This study indicates the role of endogenous phenolic compounds on the rooting of shoots and lays the foundation for further studies investigating the mechanism of rooting in these apple rootstocks and cultivars. - COLLAPSE
    31 October 2022
  • Research Article

    A Prediction Model for Hallabong Tangor Product Prices using LSTM (Long Short-term Memory) Network

    LSTM 네트워크를 이용한 한라봉 가격 예측 모델

    Dae Ho Jung and Young-Yeol Cho

    정대호, 조영열

    The predicted prices of agricultural products have a great influence on market supply and demand control decisions. The purpose of this study …

    농산물의 가격 예측은 시장 수급 조절 결정에 큰 영향을 끼친다. 본 연구의 목적은 전국 9개 도매시장에서 유통되고 있는 한라봉의 평균가격을 딥러닝 기반의 …

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    The predicted prices of agricultural products have a great influence on market supply and demand control decisions. The purpose of this study was to predict the average price of Hallabong tangor, which is distributed in 9 wholesale markets nationwide, using a deep learning-based LSTM network. Daily data (2,398 data points) from 2007 to January 2021 based on the average price of 3 kg of Hallabong tangor sold in 9 wholesale markets were used in this study. To train the model, 80% of the dataset was used as training data and 20% was used as test data. For accurate price predictions using an LSTM network, it is necessary to determine the epoch and batch size. An epoch of 700 and batch size of 128 were judged to be suitable for the model (RMSE = 1040). The resulting model could accurately predict the average price of Hallabong tangor. The deep learning-based Hallabong tangor price prediction model provides useful information for agricultural product price trends, government policy establishment, and consumer demands.


    농산물의 가격 예측은 시장 수급 조절 결정에 큰 영향을 끼친다. 본 연구의 목적은 전국 9개 도매시장에서 유통되고 있는 한라봉의 평균가격을 딥러닝 기반의 LSTM 네트워크를 이용하여 한라봉 가격을 예측하고자 하였다. 9개의 도매시장에서 거래되고 있는 한라봉의 3kg 단위 평균가격을 바탕으로 2007년부터 2021년 1월까지 2,398개의 일일 데이터를 사용하였다. Training 데이터는 전체 데이터의 80%, test 데이터는 전체 데이터의 20%를 사용하여 모델을 학습시켰다. LSTM 네트워크를 위해 보다 더 정확한 가격을 예측하기 위해서는 epoch와 batch size를 결정해야 하는데, epoch는 700과 batch size 128가 적합한 모델이라 판단하였다. 이 값을 LSTM 네트워크를 적용한 결과, 비교적 한라봉의 평균 가격을 정확하게 예측할 수 있었다(RMSE = 1040). 딥러닝 기반 한라봉 가격 예측 모델은 농산물 가격 동향과 정부 정책 수립 및 소비자들 요구에게도 유용한 정보로 활용될 수 있을 것이다.

    - COLLAPSE
    31 October 2022