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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Horticultural Science and Technology
Journal Basic Information
Journal DOI :
Korean Society of Horticultural Science
Editor in Chief :
Volume & Issues
Volume 33, Issue 6 - Dec 2015
Volume 33, Issue 5 - Oct 2015
Volume 33, Issue 4 - Aug 2015
Volume 33, Issue 3 - Jun 2015
Volume 33, Issue 2 - Apr 2015
Volume 33, Issue 1 - Feb 2015
Selecting the target year
Vegetative Growth, Productivity, and Fruit Quality in Tall Spindle of 'Fuji'/M.9 Apple Trees
Yang, Sang-Jin ; Sagong, Dong-Hoon ; Yoon, Tae-Myung ; Song, Yang-Yik ; Park, Moo-Yong ; Kweon, Hun-Joong ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 155~165
DOI : 10.7235/hort.2015.13190
Well-feathered (over 10 feathers) 'Fuji'/M.9 apple trees were planted at
and trained to slender spindle with 2.5 m height or to tall spindle with 3.5 m height, and the vegetative growth, productivity, and fruit quality of two training systems were compared for 8 years. The canopy volume of the tall spindle trees surpassed that of the slender spindle trees 4 years after planting and was 25% larger than that of the slender spindle trees 5 years after planting. The accumulated yield over 8 years for the tall spindle system was 14% higher than that of the slender spindle system. Alternate bearing and incidence of marssonina blotch were observed in both treatments after 5 years of planting. There was often vegetative imbalance in the trees however, the degree of yield loss and vegetative imbalance of the tall spindle trees was lower than those of the slender spindle trees. Soluble solid content and fruit red color of the tall spindle trees were higher than that of the slender spindle trees in 5 year after planting, resulting from increased light penetration in the canopy due to even distribution of lateral branches and from fruit bearing in different height locations of the trees. In conclusion, increasing the tree height to about 3.5 m using slender spindle 'Fuji'/M.9 apple trees planted with over 333 trees per 10a led to better light penetration, yield and fruit quality compared to a conventional wide training system with the slender spindle.
Comparison of Underground Root Growth Characteristics of Major Cool-Season Grasses according to Establishment Stages in Sports Turf Designed by the USGA Soil System
Kim, Kyoung-Nam ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 166~176
DOI : 10.7235/hort.2015.14024
Research was initiated to investigate root growth characteristics of major cool-season grasses (CSG) and to collect basic information useful for sports turf design, construction and maintenance. Several turfgrasses were evaluated in the USGA (United States Golf Association) soil system. Turfgrass entries were comprised 3 blends and 3 mixtures of Kentucky bluegrass (KB, Poa pratensis L.), perennial ryegrass (PR, Lolium perenne L.), and tall fescue (TF, Festuca arundinacea Schreb.). Significant differences were found in root growth, rooting potential and rooting development. These characteristics increased with time after seeding, but varied with establishment stages. In early stage, root length was highest with PR, intermediate with TF and lowest with KB. Evaluation in a middle stage indicated that root growth was similar to early-stage evaluation, but decreased by 13 to 31% compared with early-stage values. Root growth of late stage increased by 34 to 85% over middle-stage root growth. Overall, thhere was not much difference in root length among treatments, with all except Mixture I reaching 22cm in root length. Rooting potential ranking was variable with establishment stage, being PR > KB > TF in early stage, PR > TF > KB in middle stage and TF > PR > KB in late stage. At the end of the study, TF was rated best for rooting development, followed by PR and finally KB. Our results showed that TF was the best species in regard to overall rooting characteristics. TF exhibited excellent rooting development with time after establishment. Bunch-type PR showed fast root growth in the early stage, but rooting quality characteristics decreased with time, especially for rooting development. By contrast, rhizomatous-type KB was poor in early-stage root growth, but rooting characteristics improved with time after establishment. These variations in rooting characteristics among CSGs were considered to arise from differences in establishment vigor, growth habit and genetic characteristics. Information on root growth, rooting potential and rooting development by establishment stages will be useful for sports turf design, construction and maintenance.
Effect of Developmental Stages on Glucosinolate Contents in Kale (Brassica oleracea var. acephala)
Lee, Heon-Hak ; Yang, Si-Chang ; Lee, Min-Ki ; Ryu, Dong-Ki ; Park, Suhyoung ; Chung, Sun-Ok ; Park, Sang Un ; Lim, Yong-Pyo ; Kim, Sun-Ju ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 177~185
DOI : 10.7235/hort.2015.14017
The aim of this study was to investigate the amounts of glucosinolates (GSL) in kale at various development stages. Kale varieties 'Manchoo Collard' and 'TBC' were cultivated from 20 February 2012 to 3 July 2013 in the greenhouse at Chungnam National University. During the cultivation periods, samples were harvested at 35, 63, 91, 105, 119, and 133 days after sowing (DAS) and the amount of GSL quantified by HPLC. Ten types of GSL (progoitrin, sinigrin, glucoalyssin, gluconapin, glucoiberverin, 4-hydroxyglucobrassicin, glucobrassicin, 4-methoxyglucobrassicin, gluconasturtiin, and neoglucobrassicin) were observed in 'TBC', whereas nine types of GSL (the same as above, except glucoiberverin) were identified in 'Manchoo Collard'. The amount of total GSL in 'Manchoo Collard' was comparatively higher at 133 DAS (mean
) and lower at 35 DAS (
dry weight, DW) of cultivation. In the case of 'TBC', the amount of GSL was higher at 91 DAS (mean
) and lower at 35 DAS (
dry weight, DW). Sinigrin was the most abundant GSL (57% of total GSL) in 'Manchoo Collard' at 133 DAS and was also highest (44%) in 'TBC' at 91 DAS. Together, progoitrin, sinigrin, glucobrassicin, and gluconasturtiin, the precursor of crambene, allylisothiocyanate, indol-3-cabinol, and phenethylisothiocyanate accounted for 94 and 78% of GSL in 'Manchoo Collard' and 'TBC', respectively. Our results demonstrate that the amounts of GSL, which have potential anti-carcinogenic activity, change during development in kale.
Characteristics of the Fruits and Flesh Softening Delay Induced by GA
and Thidiazuron (TDZ) Treatment in 'Heukboseok' Grape
Jung, MyungHee ; Lee, ByulHaNa ; Park, YoSup ; Oh, Jin Pyo ; Kim, HeeSeob ; Park, Hee-Seung ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 186~195
DOI : 10.7235/hort.2015.14100
This research was conducted to investigate effect the plant growth regulators (PGRs) on the characteristics of fruit and flesh softening, using GA3 and thidiazuron (TDZ) treatments in 'Heukboseok' grapes. The total yield obtained under PGR treatment was 88.3% lower than the target production when a single treatment with
of low concentrations was used, but the expected yield was recovered by combined treatment with TDZ and
. When harvested on the basis of color, the harvest rate up to 100 days after full bloom (DAFB) was low with the
single treatment, but was increased by the addition of TDZ, with the second TDZ mixed treatment being particularly effective. The soluble solids content in the PGR-treated samples demonstrated no significant changes after 90 DAFB, while the acidity content decreased rapidly starting from 90 DAFB. Measured on the basis of sugar and acidity content, maturity was reached much earlier in treated fruit than in the non-treated fruit. Firmness was maintained at a higher level until the final harvest time after PGR treatment compared to untreated grapes according to epidermis thickness and flesh density increase to activity cell division and expansion by
and TDZ. In particular, the fruit quality was improved based on the delay of softening in primary and secondary treatments of
TDZ. The production of seedless fruit was difficult, even with the inclusion of TDZ, reaching the highest seedless rate of only 65.5%. Fruit cracking was rare, occurring at a rate of about 0.0~0.9% in all treatments. Accordingly, 'Heukboseok' grapes should be harvested within 100 days after full bloom (DBFB) before a rapid decrease of firmness, conferred by primary and secondary treatments with
Lysophosphatidylethanolamine (LPE) Improves Fruit Size, Color, Quality and Phytochemical Contents of Sweet Cherry c.v. '0900 Ziraat'
Ozgen, Mustafa ; Serce, Sedat ; Akca, Yasar ; Hong, Ji Heun ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 196~201
DOI : 10.7235/hort.2015.13195
Lysophosphatidylethanolamine (LPE) affects the quality of flowers, fruits, and other horticultural products. Studies have provided evidence that LPE can accelerate ripening of fruits and prolong shelf-life at the same time. In this study, the influence of LPE on anthocyanin accumulation and phytochemical characteristics of sweet cherry was investigated. LPE (
) was applied to a commercial sweet cherry c.v. '0900 Ziraat' orchard two and four weeks before harvest for two treatment years (2011 and 2012). Preharvest applications of LPE resulted in significant improvement in both pomological and phytochemical attributes at harvest. LPE treatment led to a 17% increase in fruit weight and a 6% increase in soluble solid content when averaged over two experimental years. Fruit phytochemical content and antioxidant capacity were increased significantly. The average total phenolic content of LPE-treated fruits for the two years was
gallic acid equivalent (GAE)/g fresh weight (g FW) compared to
GAE/g FW in the untreated control. Fruits treated with LPE had a 27% and 16% more anthocyanin than the control fruits in 2011 and 2012. Antioxidant capacity of fruits, as measured by TEAC (Trolox equivalent antioxidant capacity) assay, was 12.5 and
TE/g FW in LPE-treated and untreated control fruits, respectively, when averaged over two experimental years. Our results suggest that preharvest application of LPE may have the potential to increase anthocyanin accumulation, improve fruit quality and enhance phytochemical characteristics of sweet cherries.
Bud Development and Bud Break Characteristics in Water Cuttings of 'Campbell Early' Grapevine during Dormancy
Lee, ByulHaNa ; Park, YoSup ; Kwon, YongHee ; Han, Jeom-Hwa ; Park, Hee-Seung ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 202~209
DOI : 10.7235/hort.2015.14052
In this study, we investigated the cumulative effect of low temperature on bud dormancy release and bud break characteristics in 'Campbell Early' grapevine (Vitis labruscana B.) cuttings grown in water culture. Additionally, we observed the development of buds while exposed to low temperatures in an attempt to improve our understanding of dormancy and bud break. The shoots were collected 120 days after full bloom (DAFB; leaf abscission period), and the accumulated chill unit (CU) value was calculated by reducing the temperature to
at 125 DAFB. The rate of bud break was 100% in shoots collected at 150 DAFB, The period until the first bud break was two times longer than in the shoots collected 165 DAFB, and bud break speed was significantly reduced. These results indicate that buds are released from endodormancy after 165 DAFB, because at this point the bud break was complete (bud break rate 100%) and it occurred in a very short time period. During this period, when the low-temperature accumulated value was 321h and 442CU according to the CH and Utah models, respectively. Furthermore, the survival rate of main buds decreased rapidly after 165 DAFB, and survival rate of accessory buds was maintained at more than 90% without seasonal differences. The rate of flower bud formation of main buds was much higher than in accessory buds (1:0.23) before the release from endodormancy at 150 DAFB. The final ratio of accessory buds to main buds was high, 1:1.54, at 255 DAFB. Correlation analysis of each investigated factor revealed that bud survival rate and bud formation rate were related only for the main buds, and there was a close relationship between the survival rate of main bud and time. In addition, the survival rate of main buds was positively correlated to the rate of flower bud formation.
Physiological Characteristics of Melon Plants Showing Leaf Yellowing Symptoms Caused by CABYV Infection
Lee, Hee Ju ; Kim, Mi-Kyeong ; Lee, Sang Gyu ; Choi, Chang Sun ; Choi, Hong-Soo ; Kwak, Hae Ryun ; Choi, Gug Seoun ; Chun, Changhoo ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 210~218
DOI : 10.7235/hort.2015.14149
Melon leaves showing yellowing symptoms were analyzed using electron microscopy and RT-PCR for major cucurbit-infecting-viruses (CMV, MNSV, CGMMV, SqMV, WMV, KGMMV, PRSV and ZYMV) reported in Korea, but these viruses were not detected. As the result of further analysis by next-generation sequencing (NGS), the virus was identified as Cucurbit aphid-borne yellows virus (CABYV), and then confirmed by RT-PCR using CABYV-specific primers. When photosynthetic capacity was measured based on chlorophyll fluorescence yield (ChlFY), the leaves of the diseased plants showed
, which was one-third of the readings observed for unaffected normal plants (
). The root functions of plants affected by leaf yellowing symptoms (LYS) was
, about half that measured for the normal unaffected plants (
). Cytological observations revealed that there were no morphological differences in the palisade parenchyma and mesophyll spongy cells of the leaves between the diseased and the normal plants. However, the same leaf cells of the affected plants contained more starch granules compared to those of the normal, unaffected plants. We conclude that the LYS of muskmelon is not merely a physiological disorder but a viral disease caused by CABYV and spread by aphids.
Influence of Various Root Media in Pot Growth of 'Seolhyang' Strawberry on the Growth of Daughter Plants and Early Yield after Transplant
Park, Gab Soon ; Kim, Yeoung Chil ; Ann, Seoung Won ; Kang, Hee Kyoung ; Choi, Jong Myung ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 219~226
DOI : 10.7235/hort.2015.14122
The objective of this research was to investigate the influence of various root media on the growth of mother and daughter plants during propagation and early yield after transplanting of 'Seolhyang' strawberry. To achieve this, daughter plants were fixed to connected small pots that contained expanded rice-hull (ERH), a strawberry-specialized commercial medium (SSCM), soil mother materials (SMM), or loamy sand (LS). Then, growth of daughter plants in above- and below-ground tissue as well as early yield after transplanting to plastic house soil were investigated. The growth of daughter plants in terms of plant height, leaf area and fresh weight were the highest in the SSCM treatment. Root growth in terms of the amount of primary roots and root dry weight were the highest in the treatments of ERH and SMM and the lowest in that of SSCM, among treatments tested. The ERH treatment also showed the highest values among treatments in root length, surface area and volume when roots with 0 to 0.4 mm in diameter were investigated. The flower bud differentiation of daughter plants began on Sept. 3 in the ERH treatments, earlier than the SMM (Sept. 5) and in SSCM (Sept. 7) treatments. The tissue N contents of daughter plants were in the range of 1.41 to 1.55% in all treatments, and no significant differences were observed among treatments. This indicates that the low moisture retention capacity of ERH and water stress, rather than tissue N contents, promote the flower differentiation of daughter plants. In the evaluation of early yield after transplant, the ERH treatment of showed the highest yield in the period from November to December, reaching 667 g fruit weight per 10 plants. The yields per 10 plants in the other treatments were 581 g in SMM, 475 g in SSCM and 295 g in LS. Above results imply that the various root media have different effects on the growth of daughter plants as well as flower bud differentiation. Therefore, improvement in early yield after transplant can be achieved through selection of proper root medium for daughter plant propagation.
Growth and Cut-Flower Productivity of Spray Rose as Affected by Shading Method during High Temperature Period
Cheong, Dong-Chun ; Lee, Jin-Jae ; Choi, Chang-Hak ; Song, Young-Ju ; Kim, Hee-Jun ; Jeong, Jong-Sung ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 227~232
DOI : 10.7235/hort.2015.14154
This experiment was carried out to investigate the effects of shading materials (aluminum specific-shading screen and polypropylene non-woven fabric) and shading ratio (50% and 70%) on climatic changes, cut-flower quality, and yield of spray rose cultivars for export during high temperature periods. The daily cumulative solar radiations were higher with the aluminum specific-shading screen, especially with 50% shading compared to polypropylene non-woven fabric. Air temperature and root zone temperature within rockwool media greatly decreased with the aluminum specific-shading screen, but relative air humidity was not different among shading methods. Chlorophyll contents (SPAD values) were slightly higher with aluminum-specific shading screen than with polypropylene non-woven fabric, and were higher with 50% than with 70% aluminum specific-shading screen. Except for 'Lovely Lydia', marketable and exportable yields of all cultivars were higher with 50% than with 70% aluminum shading treatment. In addition, flowers talk length, stem diameter, number of node and 7ea-leaflet, and floret number tended to be better with aluminum specific-shading screen. Flower stalk length was higher with 70% than with 50% aluminum shading treatment. Chromaticity of petals slightly increased, and vase life was 0.5-2.5 days longer for each cultivar with aluminum specific-shading screen than with polypropylene non-woven fabric.
Comparison of the Quality of Highland-Grown Kimchi Cabbage 'Choon Gwang' during Cold Storage after Pretreatments
Bae, Sang Jun ; Eum, Hyang Lan ; Kim, Byung-Sup ; Yoon, Jungro ; Hong, Sae Jin ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 233~241
DOI : 10.7235/hort.2015.14048
Kimchi cabbage 'Choon Gwang' cultivar that was grown in highlands in Gangneung was subjected to predrying, room cooling, and forced air cooling, and then packed with/without 0.02 mm HDPE film to investigate the effect of postharvest treatment on quality characteristics during 8 weeks storage at
). Weight loss in forced air cooling and room cooling was lower than 3-4% with 0.02 mm HDPE film liner treatment during storage. However, it was only below 10% in room cooling without liner treatment and forced air cooling without liner treatment led to the highest weight loss, above 15%. Conversely, the control had lower weight loss than the others. SSC was
for all treatments and there was no difference between postharvest treatments and liner treatments. Color index and firmness both showed no differences with/without 0.02 mm HDPE film and postharvest treatments. In sensory evaluation, forced air cooling with liner treatment was effective, with the highest score, especially in appearance and crispness. After 6 weeks, control kimchi cabbage without liner treatment was damaged seriously in appearance and the internal color had changed to brown. Room cooling and predrying with liner treatment changed the start of internal browning to after 8 weeks storage.
Development of an Effective PCR Technique for Analyzing T-DNA Integration Sites in Brassica Species and Its Application
Lee, Gi-Ho ; Yu, Jae-Gyeong ; Park, Young-Doo ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 242~250
DOI : 10.7235/hort.2015.14083
Insertional mutagenesis induced by T-DNA or transposon tagging offers possibilities for analysis of gene function. However, its potential remains limited unless good methods for detecting the target locus are developed. We describe a PCR technique for efficient identification of DNA sequences adjacent to the inserted T-DNA in a higher plant, Chinese cabbage (Brassica rapa ssp. pekinensis). This strategy, which we named variable argument thermal asymmetric interlaced PCR (VA-TAIL PCR), was designed by modifying a single-step annealing-extension PCR by including a touch-up PCR protocol and using long gene-specific primers. Amplification efficiency of this PCR program was significantly increased by employing an autosegment extension method and linked sequence strategy in nested long gene-specific primers. For this technique, arbitrary degenerate (AD) primers specific to B. rapa were designed by analyzing the Integr8 proteome database. These primers showed higher accuracy and utility in the identification of flanking DNA sequences from individual transgenic Chinese cabbages in a large T-DNA inserted population. The VA-TAIL PCR method described in this study allows the identification of DNA regions flanking known DNA fragments. This method has potential biotechnological applications, being highly suitable for identification of target genomic loci in insertional mutagenesis screens.
Production of Biomass and Bioactive Compounds from Cell Suspension Cultures of Eurycoma longifolia in Balloon Type Bubble Bioreactors
Shim, Kyu-Man ; Murthy, Hosakatte Niranjana ; Park, So-Young ; Rusli, Ibrahim ; Paek, Kee-Yoeup ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 251~258
DOI : 10.7235/hort.2015.14102
Eurycoma longifolia is an important rare medicinal plant that contains valuable bioactive compounds. In the present study, cell suspension culture of E. longifolia was established for the production of biomass and phenolic compounds. Various medium parameters, such as concentration of auxin, salt strength of the medium, and sucrose and nitrogen concentrations, were optimized for the production of biomass at the flask-scale level. Full strength Murashige and Skoog (MS) medium supplemented with
naphthaleneacetic acid (NAA), 3% (w/v) sucrose, 0:60
was found suitable for biomass accumulation. Based on the optimized flask-scale parameters, cell suspension cultures were established in balloon-type bubble bioreactors, and bioprocess parameters such as inoculum density and aeration rate were optimized. Inoculum density of
and increasing aeration rate from 0.05 to 0.3 vvm, with increases every 7 days, were suitable for the accumulation of both biomass and phenolic compounds. With the optimized conditions,
DW of phenolics and
DW of flavonoids could be achieved. Phenolics isolated from the cell biomass showed optimal free radical scavenging activity.
Antioxidant Capacity and Protective Effects on Neuronal PC-12 Cells of Domestic Bred Kiwifruit
Lee, Inil ; Lee, Bong Han ; Eom, Seok Hyun ; Oh, Chang-Sik ; Kang, Hee ; Cho, Youn-Sup ; Kim, Dae-Ok ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 259~267
DOI : 10.7235/hort.2015.14123
This study was conducted to comparatively evaluate antioxidant capacity (AC) of seven cultivars of kiwifruit (Actinidia spp.) and their protective effects on neuronal PC-12 cells. The contents of total phenolics (TP) and total flavonoids (TF) of kiwifruits were also examined. Five cultivars of kiwifruit, Actinidia chinensis (cv. Haehyang and cv. Haegeum), A. eriantha (cv. Bidan), A. arguta
A. deliciosa (cv. Mansoo), and A. arguta (cv. Chiak), were bred in Korea, while two cultivars, A. deliciosa (cv. Hayward) and A. linguiensis (accession number 041AE), originated from New Zealand and China, respectively. Skin extracts of kiwifruit showed higher TP, TF, and AC than flesh extracts. The highest levels of TP and AC were found in cv. Bidan flesh extract among cultivars studied, but the TF content of cv. Bidan flesh extract was the lowest. The kiwifruit bred in Korea had higher AC than their counterparts. AC of kiwifruit had a highly positive linear correlation with TP and TF. The flesh extracts from cv. Hayward, cv. Haehyang, and cv. Haegeum significantly (p < 0.05) prevented PC-12 cells from oxidative stress induced using
compared to a control with
only. Overall, our results suggest that kiwifruit bred in Korea may offer a good source of antioxidants and serve as functional materials.
Effect of Mixed Liquid Fertilization on Growth Responses of Cherry Tomatoes and Soil Chemical Properties
Park, Ji-Suk ; Lee, Min-Jin ; Lee, Seo-Youn ; Kim, Jong-Sung ; Lee, Tae-Kyu ; Ro, Hee-Myong ; Kim, Sang-Jun ; Jeon, Seung-Woo ; Seo, Sang-Gug ; Kim, Kil-Yong ; Lee, Geon-Hyoung ; Jeong, Byung-Gon ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 268~275
DOI : 10.7235/hort.2015.14140
We evaluated the effect of mixed liquid fertilizer (MLF) on growth responses of plants and soil chemical properties. To do so, a pot experiment with cherry tomatoes (Lycopersicon esculentum var. cerasiforme) using loam soil was conducted for 81 days in a temperature-controlled glasshouse, and four N fertilization treatments were laid out in a completely randomized design with three replicates: control (C), chemical fertilizer treatment (CF), and two rates (MLF-0.5 and MLF-1.0) of MLF treatment. Soils were periodically sampled and analyzed for pH, EC, total N, inorganic N and total C, and growth characteristics of cherry tomatoes were measured. During the experimental periods, the pH of MLF soils was higher than that of CF soils. Soil total-N content increased right after CF-application and ultimately decreased to the level of the control (C) soil, while MLF-application slightly increased the level of soil total-N and this level remained unchanged throughout the experiment. The levels of soil inorganic N content increased after application of CF or MLF, but the initial increase disappeared in 56 days after transplanting (DAT). The dry weight of shoots and roots increased in CF or MLF plants, while the number of fruit increased only in MLF plants. Whereas soluble solid contents were higher in MLF plants than in the other (C and CF) plants, the titratable acidity was not different among treatments. However, no consistent effect of N treatments on major elements of the organs of cherry tomatoes was found. The amounts of N taken up by plants were 0.91 g for CF, 0.61 g for MLF-1.0, 0.43 g for MLF-0.5, and 0.25 g for control treatments, resulting in greater N efficiency for CF than for MLF.
Seasonal Variation in Contents of Sugars in Different Parts of Broccoli
Bhandari, Shiva Ram ; Kwak, Jung-Ho ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 276~282
DOI : 10.7235/hort.2015.14158
Seasonal variation in the contents of sugars (fructose, glucose, and sucrose) in the floret, leaf, and stem of broccoli were studied in ten commercial broccoli cultivars. Plants were grown in the spring and fall seasons in 2011. In both seasons, glucose was the major constituent, comprising about 50% of the total sugar content in the floret and leaf tissue of most cultivars, whereas the broccoli stem showed an unusual pattern of accumulation. Sucrose exhibited greater cultivar dependency as well as seasonal variation compared to fructose and glucose in floret and leaf tissues. The floret tissue had a higher total content of sugar in the spring compared to the fall due to an increase in glucose and fructose. However, most of the leaf and stem tissues of broccoli had a higher total sugar content in the fall compared to the spring. Furthermore, stem and leaf tissues possessed a relatively higher total sugar content compared to floret tissue in both seasons. 'Grandeur' broccoli contained a significantly greater amount of total sugar in both floret and leaf tissues in both seasons, whereas 'YuDoRi No.1' broccoli exhibited the highest total content of sugar in stem tissue. At overall, the results showed significant influences of genotype, plant part and growing season on sugar content in broccoli.
Comparison of Flavonoid Contents and Antioxidant Activity of Yuzu (Citrus junos Sieb. ex Tanaka) Based on Harvest Time
Moon, So Hyun ; Assefa, Awraris Derbie ; Ko, Eun Young ; Park, Se Won ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 283~291
DOI : 10.7235/hort.2015.14180
The aim of this study was to evaluate the changes of fruit quality, flavonoid contents and antioxidant activity of Yuzu (Citrus junos Sieb. ex Tanaka) from Go-heung and Jeju according to harvest time. Samples were harvested from August to December on the
of every month. August and September samples were green colored, whereas November and December samples were yellow. The fruit shape index decreased, changing from globular to elliptical, whereas the
increased with ripening stage. The yuzu from Jeju was larger than that from Go-heung in each month of cultivation. August samples exhibited the highest amounts of phenolic compounds. In addition, samples from Jeju had higher total phenolic content than those from Go-heung. The content of phenolic compounds decreased with ripening until October and then increased subsequently. Antioxidant activity of the yuzu was evaluated by FRAP and DPPH methods. The antioxidant activity showed a similar trend as total phenolic content. Immature yuzu fruit was found to exhibit the highest amount of flavonoids such as naringin and hesperidin. November and December samples showed almost the same contents of flavonoids. The flavonoid content of yuzu fruit harvested from Jeju was higher than that from Go-heung. Overall, the samples harvested at the early stage, in the month of August, exhibited the highest flavonoid content, phenolic content and antioxidant activity. As the health benefits of these compounds has been demonstrated in various studies, the immature yuzu appears to be preferable for use as a raw material for formulation of pharmaceutical products as well as for functional food production after a proper in-vivo and in-vitro medical tests.
A New Cultivar Hibiscus syriacus 'Red Bohanjae' with Small Violet-Pink Flowers for a Pot Plant
Ha, Yoo Mi ; Kim, Dong Yeob ; Shim, Kyung Ku ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 292~297
DOI : 10.7235/hort.2015.14128
A new cultivar of Hibiscus 'Red Bohanjae' (Hibiscus syriacus 'Red Bohanjae') was developed after crossing between Hibiscus syriacus 'Andong' (♀) with white flowers and Hibiscus syriacus 'Samchully' (♂) with pink flowers to improve flower quality and growth habit. The Hibiscus breeding program was initiated in 2002, and H. syriacus 'Red Bohanjae' was preliminarily selected as '02-RV-17' in 2003 due to its stable flower quality with rich pink flowers and small tree type. The selected line was further evaluated for growth characteristics, leaf shape, leaf size, flowering characteristics, and tested for distinctness, homogeneity, and stability during 2004-2007. The characteristics preserved by grafting. 'Red Bohanjae' showed a small growth habit with slightly upright branches. The tree had potential use as a potted plant or bonsai because of its dwarf form. The new cultivar 'Red Bohanjae' had violet-pink color flowers (RHS N78C) with red eye spots, small size (9.2 cm) and spatulate (I-type) petals. Leaves were 4.2 cm long and 2.3 cm wide. After the evaluation of plant characteristics for 3 years (2005-2007), it was registered as cultivar 'Red Bohanjae' (4118, plant variety protection rights number) in 2012. 'Red Bohanjae' having violet-pink flowers with red eye and dwarf tree form seems to be suitable for pot or bonsai cultivation in both indoor and outdoor conditions.
Hibiscus syriacus 'Dasom', A New Flower-Color Mutant Variety Developed by Radiation Breeding
Kim, Sang Hoon ; Kim, Dong Sub ; Kim, Jin-Baek ; Ha, Bo-Keun ; Lee, Duk Man ; Song, Hi Sup ; Kang, Si-Yong ;
Korean Journal of Horticultural Science and Technology, volume 33, issue 2, 2015, Pages 298~301
DOI : 10.7235/hort.2015.14160
A new Hibiscus syriacus variety, 'Dasom', was developed by radiation breeding using gamma ray exposure at the Korea Atomic Energy Research Institute (KAERI). Seeds of the original variety, 'Hongsun', were collected in 1993. These seeds were irradiated at 100 Gy dose and
seeds were planted in a field of the KAERI in 1994. Lines with preferred flower color that were going to be used for street trees were initially selected in 1998. Analyses of characteristics were conducted from 2005 to 2010. The 5-year-old 'Dasom' plants were approximately 106 cm in height and averaged 19 branches, and thus were suitable for street trees. The flowers of 'Dasom' were semi-double type with medium red color and red eye spots. Petal length and width were about 4.0 cm and 3.3 cm, respectively. Flower diameter was slightly small, at about 5.8 cm, because of highly overlapping petals. The flowering period of 'Dasom' was about 105 days, which was 6 days shorter than that of the original variety, 'Hongsun'. However, the main charactersistics of 'Dasom' including leaf shape were similar to those of the original variety, 'Hongsun'.