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.
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Research Article
- Research on the Establishment of Strawberry Stem Tip Tissue Cultivation and In-vitro Rapid Micropropagation System
- Guoye Guo, Wenxue Li, Yichen Liu, Xiaoyi Jing, Manyu Su, Yuxuan Ding, Jiaying Wu
- The creeping shoot tips of strawberry varieties “Shengdanhong” and “Hongyan” were cultivated in vitro to develop protocols for expeditious and reliable micropropagation. …
- The creeping shoot tips of strawberry varieties “Shengdanhong” and “Hongyan” were cultivated in vitro to develop protocols for expeditious and reliable micropropagation. The morphogenetic response of varying concentrations and combinations of different hormones on shoot tip germination, proliferation and rooting were studied. The results showed that the most suitable shoot tip induction medium for “Shengdanhong” was MS media containing 0.5 mg·L-1 6-BA and 0.2 mg·L-1 IBA, while for “Hongyan” it was MS media containing 1.0 mg·L-1 6-BA and 0.1 mg·L-1 IBA, with corresponding germination rates of 84.21% and 88.10%. The optimal subculture adventitious bud proliferation outcome had been cultured in MS media supplemented with 0.2 mg·L-1 6-BA and 0.1 mg·L-1 NAA, with proliferation coefficients were 6.11 and 7.13, respectively. The highest corresponding rooting rates were 72.41% and 91.67% for “Shengdanhong” and “Hongyan”, as cultured in 1/2MS medium containing 0.5 mg·L-1 IBA and 2 mg·L-1 AC, and 1/2MS containing 0.5 mg·L-1 IBA, respectively. Virus detection of regenerated seedlings by RT-PCR showed that the SMoV and SCV detoxification rates were 92.5% and 100%, respectively. These examined findings contribute valuable insights into the mass production of virus-free strawberry plantlets using in vitro culture techniques. - COLLAPSE
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Research Article
- Stratification for Breaking Morphophysiological Dormancy in Corydalis platycarpa (Maxim. ex Palib.) Makino Seeds: Requirements Embryo Growth and Germination
- Jihun Lee, Kyungtae Park, Hamin Lee, Soyeon Park, Bo-Kook Jang, Young-Hyun You, Ju-Sung Cho
- Corydalis platycarpa (Maxim. ex Palib.) Makino contains various alkaloids with notable clinical therapeutic value, including inhibiting gastric juice secretion and acting as …
- Corydalis platycarpa (Maxim. ex Palib.) Makino contains various alkaloids with notable clinical therapeutic value, including inhibiting gastric juice secretion and acting as an analgesic. It serves as an antibacterial agent. However, information on the germination and dormancy of C. platycarpa for ecosystem restoration and species utilization is lacking. Therefore, this study aimed to classify dormancy types and improve dormancy-breaking methods through the effects of phenology, move-along, plant growth regulators, and stratification at various temperatures on C. platycarpa seeds. Fresh seeds of C. platycarpa showed underdeveloped embryos and did not germinate within 4 weeks at any temperature, confirming morphophysiological dormancy (MPD). Germination of 53.0% was observed after 12 weeks at 4°C but the remaining ungerminated seeds required warm temperatures before low temperatures for embryo growth and germination, evidenced in phenology and move-along experiments. However, GA3 did not replace cold or warm stratification and did not affect germination. Therefore, C. platycarpa seeds were classified as having two MPD levels, with 45.0% and 55.0% being non-deep and deep complex MPD levels, respectively. While dormancy in C. platycarpa seeds took a long time to break in the natural environment, it was efficiently broken by 4 weeks of stratification at 15/6°C before experiencing low temperatures. This research on classifying dormancy and improving dormancy-breaking methods can be used for large-scale propagation for ecosystem restoration and species utilization. - COLLAPSE
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Research Article
- Pre-Harvest Foliar Applications of Calcium Chloride and Glycine Betaine Reduce Stem Bowl Cracking and Enhance the Cuticle in ‘Picnic’ Apples
- Hong Kyoo Kim, Jung-Geun Kwon, Nay Myo Win, Jingi Yoo, Kyoungook Kim, A Reum Han, Dae Hyun Kim, Seonae Kim, In-Kyu Kang
- Stem bowl cracking in apples can significantly reduce fruit quality and market value. Therefore, this study evaluated the efficacy of pre-harvest foliar …
- Stem bowl cracking in apples can significantly reduce fruit quality and market value. Therefore, this study evaluated the efficacy of pre-harvest foliar applications of calcium chloride (CaCl2), glycine betaine (GB), and water (control) in reducing stem bowl cracking, enhancing fruit quality, and improving the cuticle of ‘Picnic’ apples at harvest and during 3 months of cold storage at 0°C. Both CaCl2 and GB treatments significantly reduced the incidence and severity of stem bowl cracking at harvest compared to the control, with GB exhibiting greater effectiveness. Foliar applications also enhanced the morphological characteristics (area, weight, and thickness) of the fruit cuticle. Furthermore, pre-harvest treatments did not affect fruit quality parameters, such as fruit weight, size, firmness, titratable acidity (TA), internal ethylene concentration (IEC), and starch pattern index (SPI) at harvest, apart from an increase in soluble solids content (SSC). During cold storage, CaCl2 and GB treatments did not affect IEC, firmness, or SPI but slowed the rate of TA loss and moderated changes in fruit color, including an increase in a* and a decrease in L*, particularly on the sun-exposed side of the fruit. Additionally, the GB-treated group exhibited higher SSC during storage compared to other groups. Overall, this study demonstrates that pre-harvest foliar applications of CaCl2 and GB effectively mitigate stem bowl cracking in ‘Picnic’ apples by enhancing the cuticle’s structure and composition. However, their influence on overall fruit quality at harvest and during postharvest storage is relatively limited. - COLLAPSE
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Research Article
- QTL Analysis of Fruit Shape in Bitter Gourd (Momordica charantia L.) Based on BSA and Linkage Mapping
- Jing Wang, Wei Yang, Binqi Xu, Jiong Li, Zixing Liang, Yu Hong, Jiaowen Cheng, Pengwei Xu, Yongfeng Liu, Junjie Cui
- Bitter gourd (Momordica charantia L.) is one of the most valuable crops in the Cucurbitaceae family. Fruit shape significantly impacts the …
- Bitter gourd (Momordica charantia L.) is one of the most valuable crops in the Cucurbitaceae family. Fruit shape significantly impacts the appearance, quality, and commercial value of bitter gourd. This work investigated the genetic basis of the shape of bitter gourd fruit by analyzing fruit shape inheritance using a mixed major gene plus polygenes inheritance model. QTL analysis of fruit shape was conducted using BSA mapping combined with linkage mapping with an F2 population from a cross between ‘K44’ (a stick-shaped inbred line) and ‘Tan’ (a conical-shaped inbred line). Genetic analysis revealed that the genetic model 1MG-NCD (a single pair of a negatively complete dominant major gene) was the best fit for the fruit shape index, with the major gene heritable rate at 39.56%. BSA mapping revealed three genetic loci regulating fruit shape on chromosomes MC01 (FS1.1), MC03 (FS3.1), and MC07 (FS7.1). Linkage mapping revealed one QTL each linked to fruit length (qFL1.1), fruit diameter (qFD1.1), fruit shape index (qFSI1.1), and fruit shape (qFS1.1). These findings led to the discovery of a consensus and major-effect QTL qMcFS1.1 on chromosome MC01, which was then mapped to a 452.63 kb interval. This underlying major-effect QTL will lay a solid foundation for the fine mapping and cloning of this locus for fruit shape in bitter gourds. - COLLAPSE
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Research Article
- Physics-Informed Neural Networks for Predicting Internal Forces and Deformations of Structural Frames in a Single-Span Agricultural Greenhouse
- Solhee Kim, Taegon Kim, Jeongbae Jeon
- The increasing frequency of climate change and extreme weather events has highlighted the urgency of structural safety in agricultural facilities. Accurate predictions …
- The increasing frequency of climate change and extreme weather events has highlighted the urgency of structural safety in agricultural facilities. Accurate predictions of internal forces and deformations in frame members are essential for ensuring structural integrity. However, the conventional finite element method (FEM) analysis is computationally expensive and requires a complete reanalysis when structural configuration or loading conditions are modified. This study proposes a novel approach using physics-informed neural networks (PINNs) based on FEM principles to predict internal forces and deformations in single-span greenhouse frames. The proposed model integrates equilibrium equations, strain-displacement relationships, and material constitutive laws into the loss function. The accuracy of this approach was evaluated using a single-span agricultural greenhouse subjected to snow loads. The results show that PINN achieves remarkable accuracy, with maximum errors of 1.24% and deformation errors of 0.1 mm, showing excellent agreement with FEM analysis results. These findings validate the effectiveness of the proposed FEM-based PINN for analyzing complex structural systems, presenting a significant methodological advancement applicable to structural analyses of agricultural facilities. - COLLAPSE
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Research Article
- Light, Temperature, and Relative Humidity Influence the Adventitious Rooting of Cannabis Stem Cuttings
- Byungjun Kim, Seungyong Hahm, YongJae Lee, Gwonjeong Bok, Jongseok Park
- Cannabis is an annual dioecious herbaceous plant native to Central Asia. Owing to its medicinal properties, laws regarding cannabis use have been …
- Cannabis is an annual dioecious herbaceous plant native to Central Asia. Owing to its medicinal properties, laws regarding cannabis use have been liberalized worldwide, with many studies focusing on global cannabis cultivars. This study aimed to determine the optimal environmental conditions—light quality, relative humidity, and temperature—for cutting propagation of the cannabis cultivars ‘IT342810’ and ‘IT342811,’ developed by the Rural Development Administration of Korea. The results showed that the optimal light quality varied between cultivars, while high relative humidity consistently promoted adventitious root formation in both cultivars. The optimal rooting temperatures were 25–30°C for ‘IT342810’ and 20–30°C for ‘IT342811.’ Although this study focused on identifying optimal environmental conditions for Korean cannabis cultivars, the differing responses between the cultivars investigated here suggest that optimal conditions suggest depending on the genetic background of each cultivar. - COLLAPSE
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Research Article
- Assessment of Pipe-Induced Brushing to Trigger Mechanical Stress Responses and Minimize Cell Damage for Large-Scale Applications in Tomato Transplants
- Hyuk Sung Yoon, Ho-Min Kang, Dong Cheol Jang
- Applying mechanical stress offers enhanced productivity and the ability to regulate secondary metabolites. However, conventional methods such as rubbing or brushing are …
- Applying mechanical stress offers enhanced productivity and the ability to regulate secondary metabolites. However, conventional methods such as rubbing or brushing are laborious and result in undesired tissue damage when applied to a large number of plants at once. In this study, we evaluated pipe-induced brushing, a mild method that effectively induces stress responses in tomato transplants. We treated plants with mechanical stress by repeatedly moving a pipe back and forth over the plant top area, enabling the simultaneous application of stress to multiple plants. Compared with conventional methods such as rubbing and paint-brush brushing, pipe-induced brushing induces stomatal closure but significantly reduces tissue damage compared to rubbing. We tested treatments involving five, ten, and fifteen cycles. Our results showed that all cycles of pipe-induced brushing could induce leaf epidermal damage during the consecutive treatment period, with the damaged plants fully recovering seven days after the final mechanical stress. Furthermore, all treated groups exhibited similar morphological changes, including reduced plant heights and enhanced anthocyanin accumulation, suggesting that at least five cycles of pipe-induced brushing effectively affect the regulation of the plant mechanical stress response without causing any severe damage. We also found that pipe-induced brushing produced consistent results across different tomato cultivars, suggesting its broad application. These findings suggest that pipe-induced brushing is an effective and scalable mechanical stress treatment for regulating growth in tomato transplants. - COLLAPSE
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Research Article
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Growth Characteristics of Cabbage Due to the Use of Spent Coffee Ground Compost with Different Mixing Ratios
커피박퇴비 혼합 비율에 따른 봄배추의 생육 특성
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Jin Hee An, Mung Hwa Yoo, Ki Young Choi, Ho Sang Cho, Ye Jin Lee, Eun Young Choi
안진희, 유명화, 최기영, 조호상, 이예진, 최은영
- In this study, we attempted to determine the appropriate fertilization rate of spent coffee ground compost (SCGC) to reach a suitable state …
본 연구는 배추(Brassica rapa L. ‘고소미봄동’)를 재배하여 커피박퇴비(SCGC)의 적정 혼합 비율을 확인하고자 수행하였다. 커피박퇴비(SCGC)는 중금속 및 미생물 함량이 비료관리시행규칙에 적합하였다. 총 …
- In this study, we attempted to determine the appropriate fertilization rate of spent coffee ground compost (SCGC) to reach a suitable state for cultivating cabbage (Brassica rapa L. ‘Gosomibomdong’) by measuring certain growth characteristics. The heavy metal and microbial contents of SCGC were found to comply with fertilizer management enforcement regulations. A chemical analysis of the SCGC showed that total nitrogen, organic phosphoric acid, organic matter, and inorganic ions (K, Mg) exceeded the levels in control samples correspondingly by 7.0, 5.1, 3.3, 3.8, and 4.8 times. The growth, length, and width of the leaves; the leaf number; and the chlorophyll content were measured when commercial horticultural media (CHM, control) was mixed with SCGC at the ratios of 10, 20, 30, or 40% (v/v) (CHM+SCGC10, CHM+SCGC20, CHM+SCGC30, or CHM+SCGC40) and 1, 3, 5, or 7% (CHM+SCGC1, CHM+SCGC3, CHM+SCGC5, or CHM+SCGC7). For comparison, the CHM was mixed with 10% of earthworm cast (EC10) and 1% of commercial coffee ground compost (CG1). Before plant growth, a SCGC quality test (seed germination) showed a safety fertilizer germination rate exceeding 98%. The coffee bean compost’s EC (electrical conductivity) was 4.53 ds·m-1, 9.2 times more than the control. The shoot fresh weights after the CHM+SCGC10 and CHM+SCGC40 treatments were lower by approximately 19.6 and 90.7%, respectively, compared to those of the CHM. When SCGC was mixed at 1, 3, 5, or 7% by volume, the shoot fresh weight grown on the CHM+SCGC1 was higher about 24.2% than that on the CHM, while it was lower about 3.9% on the CHM+SCGC3. The shoot dry weight grown on the CHM+SCGC1 was also lower than that on the CHM+SCGC3, while there is no difference of it between CHM and CHM+SCGC1. Although it may vary depending on the content of the coffee ground, or other ingredients, the appropriate mixing ratio with commercial horticultural media is lower than 3%.
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본 연구는 배추(Brassica rapa L. ‘고소미봄동’)를 재배하여 커피박퇴비(SCGC)의 적정 혼합 비율을 확인하고자 수행하였다. 커피박퇴비(SCGC)는 중금속 및 미생물 함량이 비료관리시행규칙에 적합하였다. 총 질소, 유기인산, 유기물 함량, 치환성양이온(K, Mg)은 CHM보다 각각 7.0, 5.1, 3.3, 3.8 및 4.8 배 높았고 EC 농도는 4.53ds·m-1로 CHM 보다 9.2 배 높았다 시판 상토(CHM)에 커피박퇴비(SCGC)를 부피비율(v/v)로 각각 0, 10, 20, 30, 40%(CHM, CHM+SCGC10, CHM+SCGC20, CHM+SCGC30, CHM+SCGC40) 또는 0, 1, 3, 5, 7%(CHM, CHM+SCGC1, CHM+SCGC3, CHM+SCGC5 CHM+SCGC7)로 배합한 처리구와 비교를 위해 지렁이분변토(EC) 10%를 혼합한 처리구(CHM+EC10)와 시판커피박퇴비 1%를 혼합한 처리구(CHM+CG1)에서 생육 특성을 조사하였다. 식물 재배 전 SCGC의 품질검사 방법 중 부숙도를 종자발아법으로 조사한 결과 발아율이 98%이상으로 나타났다. SCGC가 10, 20, 30 또는 40% 부피 비율로 배합되었을 때 지상부 생체중은 CHM+SCGC10와 CHM+SCGC40 처리구에서 CHM 보다 19.6, 90.7% 낮았다. SCGC가 1, 3, 5 또는 7% 부피 비율로 혼합되었을 때 지상부 생체중은 CHM+SCGC1에서는 CHM보다 24.2%높았으나 CHM+SCGC3에서는 3.9%낮았고, 건물중은 CHM+SCGC1에서 CHM처리구와 유의차가 없고 CHM+CG1과 CHM+SCGC3보다는 높게 나타나 SCGC비율이 3% 이상 높은 처리구에서는 생육이 감소하는 것을 알 수 있다. 커피박퇴비에 함유된 원료인 커피 찌꺼기 함량 또는 부재료 성분에 따라 달라질 수 있고 작물 종류와 혼합 토양의 종류에 따라 다를 수 있지만, 상토에 혼합하는 커피박퇴비의 적정 배합 비율은 3% 미만 수준인 것으로 판단된다.
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Growth Characteristics of Cabbage Due to the Use of Spent Coffee Ground Compost with Different Mixing Ratios
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Research Article
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Estimation of the Amounts of Supplemental Carbon Dioxide (CO2) when Considering Night Respiration for a Hydroponics Tomato Greenhouse
토마토 수경 온실에서 야간 호흡량을 고려한 이산화탄소(CO2) 시비량 예측
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Su-Hyun Choi, Young-Hoe Woo, Seo-A Yoon, Dong-Cheol Jang, Eun-Young Choi
최수현, 우영회, 윤서아, 장동철, 최은영
- This study aimed to estimate amount of carbon dioxide (CO2) supplementation necessary for tomato hydroponic cultivation by considering nighttime respiration …
본 연구는 선행연구에서 구축한 이산화탄소(CO2) 공급량 예측 모델식을 기반으로 야간 호흡을 고려한 CO2 공급량을 예측하기 위하여 실험 1에서는 봄 …
- This study aimed to estimate amount of carbon dioxide (CO2) supplementation necessary for tomato hydroponic cultivation by considering nighttime respiration using model-based equations. Experiment 1 was conducted in a commercial tomato hydroponic greenhouse during the spring growing season. Experiment 2 was conducted in an experimental greenhouse during the autumn growing season, with the predicted and measured CO2 increases due to plant respiration during the nighttime also compared. In experiment 1, the supply rate of CO2 fertilizer with LPG was a set to 600 µmol·mol-1 from 7:30 to 11:00 in a commercial tomato hydroponics greenhouse, and in experiment 2, CO2 was supplied at a set rate of 600 µmol·mol-1 from 9:00 to 11:00 using a liquefied CO2 generator in the experimental greenhouse. The estimation of the CO2 concentration prior to the first supplement of the day was calculated by adding the CO2 concentration about the time of sunset (lower than 50W solar radiation) on the last day to the integrated respiratory CO2 concentrations during the nighttime. In experiment 1, the estimated amount of CO2 supplement ranged from 3.24 to 36.9 g CO2·m-2·h-1 when the nighttime temperature was between 16 and 19°C, while in experiment 2, the estimated amount of CO2 supplement ranged from 4.21 to 52.6 g CO2·m-2·h-1 when the lowest nighttime temperature was 13°C. These results suggest that the night respiratory CO2 was affected by the night temperature of the greenhouse and therefore has an impact on the CO2 supplementation amount. Therefore, it suggests that the new model equation that introduces night respiration into the estimation of supplemental CO2 amounts can be used to precisely control greenhouse CO2 supplement.
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본 연구는 선행연구에서 구축한 이산화탄소(CO2) 공급량 예측 모델식을 기반으로 야간 호흡을 고려한 CO2 공급량을 예측하기 위하여 실험 1에서는 봄 재배기간 동안 상업적 토마토 수경재배 온실에서, 실험 2는 가을 재배 기간 동안 실험 온실에서 실험을 수행하였고, 추가적으로 야간 시간대 식물 호흡 작용으로 인한 CO2 증가량 예측값과 실측값을 비교하였다. 실험 1은 상업용 토마토 재배 온실에서 LPG 연소형 이산화탄소 발생기를 이용하여 600µmol·mol-1을 목표 농도로 오전 7시30분부터 11시까지 수행하였으며 실험 2는 실험온실에서 수행하였으며 CO2 공급은 액화탄산발생기를 이용하여 600µmol·mol-1을 목표 농도로 설정하여 오전 9시부터 11시까지 실시하였다. 하루의 첫 CO2 공급 시작 시점의 예측 CO2 농도(PV C i )는 전날 일몰 시점(광량 50W 이하)의 CO2 농도( C ( l t ) )에 야간 호흡량을 합하여 계산하였다. 실험 1에서 토마토 온실 야간 기온이 16–19°C 범위였던 3월 24–26일의 3일간 예측된 CO2 시비량은 3.24–36.9g CO2·m-2·h-1범위였고, 실험 2에서 토마토 온실 야간 기온이 최저 13°C까지 내려간 조건이였던 10월 16–18일의 3일간 예측된 CO2는 4.21–52.6g CO2·m-2·h-1범위였다. 온실의 최저 야간 기온이 호흡량에 영향을 미치고 그에 따라 CO2 시비량이 달라지는 것을 알 수 있다. 따라서, 기존 CO2 공급량 예측 모델식에 야간 호흡이 도입된 새로운 모델식은 온실 CO2 공급량을 정밀하게 예측하여 조절하는데 활용될 수 있을 것으로 보인다.
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Estimation of the Amounts of Supplemental Carbon Dioxide (CO2) when Considering Night Respiration for a Hydroponics Tomato Greenhouse
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Research Article
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Exocarp Characteristics of Berries and the Effect of the Berry Density on the Fruit Quality and Occurrence of Cracking in ‘Hongju Seedless’ Grapes
포도 ‘홍주씨들리스’의 과피특성과 과립밀도가 과실품질과 열과 발생에 미치는 영향
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Young Min Choi, Jun Geol Lee, Hyun Jung Kim, Ji Min Park, Mun Ho Seong, Dong Hoon Lee, Seo Jun Park, Chi Seon Kim, Dong Geun Choi
최영민, 이준걸, 김현정, 박지민, 성문호, 이동훈, 박서준, 김치선, 최동근
- ‘Hongju Seedless’ is a seedless table grape variety conventionally treated with plant growth regulators to achieve berry enlargement. However, improved cultivation methods …
무핵 포도인 ‘홍주씨들리스’는 과립 비대를 위해 생장조정제 처리가 관행적으로 이루어지고 있으나, 열과 발생이 많아 대책이 요구되고 있다. 따라서 본 연구는 포도 ‘홍주씨들리스’의 …
- ‘Hongju Seedless’ is a seedless table grape variety conventionally treated with plant growth regulators to achieve berry enlargement. However, improved cultivation methods are required due to the increased occurrence of fruit cracking. This study was conducted to identify the optimal berry density by comparing the fruit quality and occurrence of cracking at different berry densities in the ‘Hongju Seedless’ grape variety. Additionally, the relationship between the anatomical characteristics of the berry exocarp and cracking was assessed. The number of berries per cluster was thinned to 35, 45, 55, and 65 berries at 20 days after full bloom, and the berry densities based on the cluster length were 1.7, 2.2, 2.7, and 3.1 berries·cm-1, respectively. Regarding the fruit quality, an increase in the berry density was correlated with an increased cluster weight, a greater number of berries, higher titratable acidity, a greater soluble solids content and a decreased Hunter a value and tended to delay ripening. The occurrence of cracking was increased as the density of the berries increased. Moreover, the cracking of stylar-end parts of the berries was 95.0% and 74.1% in 2021 and 2022, respectively, greater than the stem-end parts (5.0% and 22.2%) and the equatorial parts (0% and 3.6%). The berry skin thickness was greater in the stylar-end parts (102.0 μm) than in the stem-end parts (77.9 μm) and the equatorial parts (89.7 μm) of the berry at harvest period. Similar trends were also observed in the number of sub-epidermal cells per 1mm2. On the other hand, the pericarp hardness was lower in the stylar-end part (774.1 g) than in the stem-end part (847.6 g) and the equatorial part (947.8 g) of the berry. The stigma-stain located in the stylar-end area of the berry was larger and had a depressed center in ‘Hongju Seedless’ compared to ‘Shine Muscat’ grapes, which was presumed to be related to berry hardness and the occurrence of cracking. Based on these findings, the optimal berry density per cluster for quality improvement should be adjusted to 1.7 to 2.2 berries·cm-1 (35 to 45 berries per cluster).
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무핵 포도인 ‘홍주씨들리스’는 과립 비대를 위해 생장조정제 처리가 관행적으로 이루어지고 있으나, 열과 발생이 많아 대책이 요구되고 있다. 따라서 본 연구는 포도 ‘홍주씨들리스’의 과립밀도에 따른 과실품질과 열과 발생을 비교하여 적정 과립밀도를 제시하고자 수행되었다. 또한 과립 부위별 과피의 해부학적 특성이 열과에 미치는 영향에 대하여 구명하고자 하였다. 2021–2022년까지 과방당 과립 수는 만개 후 20일 35, 45, 55, 65립 수준으로 적립하였고, 각 과립 수에 따른 과립밀도는 각각 1.7, 2.2, 2.7, 3.1개·cm-1이었다. 과실품질 요인 중, 과립밀도가 증가할수록 과방중, 과립 수, 산 함량은 증가하였고, 가용성 고형물 함량과 hunter a값은 감소하여 숙기가 지연되는 경향이었다. 또한 열과 발생은 과립밀도가 증가할수록 많았고, 과립 부위별로는 2021년과 2022년 과정부가 각각 95.0%, 74.1%로 과경부(5.0%, 22.2%), 적도부(0%, 3.6%)보다 많았다. 과립 과정부의 아표피 두께는 102.0um로 과경부(77.9um), 적도부(89.7um)보다 두꺼웠으며, 1mm2당 아표피 세포 수도 동일한 경향이었다. 반면 과정부의 경도는 774.1g으로 과경부(847.6g), 적도부(947.8g)보다 낮았다. 포도 ‘홍주씨들리스’의 과립 과정부에 있는 주두흔은 상대적으로 ‘샤인머스캣’보다 크고 중심부가 함몰된 형태를 보였는데, 과립 경도, 열과 발생과 관련이 있을 것으로 추정되었다. 따라서 품질향상을 위한 적정 과립밀도는 1.7–2.2개·cm-1(과방당 35–45립)로 조절해야 할 것으로 판단된다.
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Exocarp Characteristics of Berries and the Effect of the Berry Density on the Fruit Quality and Occurrence of Cracking in ‘Hongju Seedless’ Grapes
Horticultural Science and Technology
