This page has only limited features, please log in for full access.
Cherry tomato is a perishable fruit vegetable that requires packaging for a relatively long distribution period. In this study, we combined the effects of changing the normal composition of air in the package and short-term pre-storage treatment of fruits with 1-methylcyclopropene (1-MCP) and high CO2 to maintain quality and extend the distribution period of ‘Unicorn’ cherry tomato. The treatments were modified atmosphere packaging (MAP), active modified atmosphere packaging (AMAP), high CO2 + MAP, and 1-MCP + MAP. All the treatments were sealed with 40,000 cc/m2 day atm oxygen transmission rate (OTR) film and stored at 20 and 10 °C up to 11 and 15 days, respectively. Based on the observed results of physicochemical and antioxidant parameters, the order of importance to prolong storability and maintain antioxidant properties of cherry tomatoes could be MAP + CO2 > MAP + 1-MCP > AMAP > MAP. The current study provides important practical information on the packaging systems of cherry tomatoes to extend the distribution period and maintain antioxidant properties for the satisfaction of either the domestic or the neighboring overseas consumers.
Shimeles Tilahun; Yeon Mi Lee; Han Ryul Choi; Min Woo Baek; Jung-Soo Lee; Do Su Park; Ho-Min Kang; Cheon Soon Jeong. Modified atmosphere packaging combined with CO2 and 1-methylcyclopropene prolong the storability and maintain antioxidant properties of cherry tomato. Scientia Horticulturae 2021, 288, 110401 .
AMA StyleShimeles Tilahun, Yeon Mi Lee, Han Ryul Choi, Min Woo Baek, Jung-Soo Lee, Do Su Park, Ho-Min Kang, Cheon Soon Jeong. Modified atmosphere packaging combined with CO2 and 1-methylcyclopropene prolong the storability and maintain antioxidant properties of cherry tomato. Scientia Horticulturae. 2021; 288 ():110401.
Chicago/Turabian StyleShimeles Tilahun; Yeon Mi Lee; Han Ryul Choi; Min Woo Baek; Jung-Soo Lee; Do Su Park; Ho-Min Kang; Cheon Soon Jeong. 2021. "Modified atmosphere packaging combined with CO2 and 1-methylcyclopropene prolong the storability and maintain antioxidant properties of cherry tomato." Scientia Horticulturae 288, no. : 110401.
Tomatoes are rich in secondary metabolites such as lycopene, β-carotene, phenolics, flavonoids, and vitamin C, which are responsible for their antioxidant activates. A high level of γ-Aminobutyric acid (GABA), a health-promoting functional compound, was also found to accumulate in tomato fruit. In addition to the internal quality attributes, the acceptance of the tomato fruit by consumers is highly dependent on appearance and taste. Hence, we conducted this study to evaluate ‘Tori’, ‘TY VIP’, ‘Mamirio’, and ‘Arya’ tomato cultivars based on their physicochemical characteristics, contents of secondary metabolites, and GABA content. The results have revealed that the tested cultivars were very firm, which renders them the best choice for postharvest distribution of fresh market tomatoes as they resist impacts during harvesting and postharvest operations. Based on total soluble solids (TSS), titratable acidity (TA), and Brix acid ratio (BAR) the choice of cultivar could be ‘Mamirio’ > ’Tori’ > ‘TY VIP’ > ‘Arya’. Apart from flavor intensity, ‘Mamirio’ and ’Tori’ also revealed the highest content of ascorbic acid while ‘Mamirio’ and ‘Arya’ had the highest carotenoids (lycopene and β-carotene) accumulation. On the other hand, the highest total phenolics content was recorded from ‘TY VIP’ and ‘Arya’. Moreover, the highest total flavonoids and GABA contents were recorded from ‘TY VIP’. Nevertheless, the antioxidant activity of ‘TY VIP’ was the lowest of all tested cultivars while the highest was recorded from ‘Mamirio’. Taken together, the findings of the present study could suggest that the consumers’ requirements could be better fulfilled by choosing cultivars for the specific target functional compounds. From the tested cultivars, if the target is ascorbic acid, carotenoids, and antioxidant activity then ‘Mamirio’ is the best choice. On the other hand, if the target is total phenolics, flavonoids, and GABA then ‘TY VIP’ is the best choice. One could also label ‘Mamirio’ as an ‘antioxidant tomato’ and ‘TY VIP’ as the ‘GABA tomato’.
Shimeles Tilahun; Han-Ryul Choi; Min-Woo Baek; Lee-Hee Cheol; Ki-Wung Kwak; Do-Su Park; Tifsehit Solomon; Cheon-Soon Jeong. Antioxidant Properties, γ-Aminobutyric Acid (GABA) Content, and Physicochemical Characteristics of Tomato Cultivars. Agronomy 2021, 11, 1204 .
AMA StyleShimeles Tilahun, Han-Ryul Choi, Min-Woo Baek, Lee-Hee Cheol, Ki-Wung Kwak, Do-Su Park, Tifsehit Solomon, Cheon-Soon Jeong. Antioxidant Properties, γ-Aminobutyric Acid (GABA) Content, and Physicochemical Characteristics of Tomato Cultivars. Agronomy. 2021; 11 (6):1204.
Chicago/Turabian StyleShimeles Tilahun; Han-Ryul Choi; Min-Woo Baek; Lee-Hee Cheol; Ki-Wung Kwak; Do-Su Park; Tifsehit Solomon; Cheon-Soon Jeong. 2021. "Antioxidant Properties, γ-Aminobutyric Acid (GABA) Content, and Physicochemical Characteristics of Tomato Cultivars." Agronomy 11, no. 6: 1204.
Cold storage of peach fruit at low temperatures may induce chilling injury (CI). Pre-storage 1-MCP and high CO2 treatments were reported among the methods to ameliorate CI and reduce softening of peach fruit. However, molecular data indicating the changes associated with pre-storage 1-MCP and high CO2 treatments during cold storage of peach fruit are insufficient. In this study, a comparative analysis of the difference in gene expression and physico-chemical properties of fruit at commercial harvest vs. stored fruit for 12 days at 0 °C (cold-stored (CS), pre-storage 1-MCP+CS, and pre-storage high CO2+CS) were used to evaluate the variation among treatments. Several genes were differentially expressed in 1-MCP+CS- and CO2+CS-treated fruits as compared to CS. Moreover, the physico-chemical and sensory data indicated that 1-MCP+CS and CO2+CS suppressed CI and delayed ripening than the CS, which could lead to a longer storage period. We also identified the list of genes that were expressed commonly and exclusively in the fruit treated by 1-MCP+CS and CO2+CS and compared them to the fruit quality parameters. An attempt was also made to identify and categorize genes related to softening, physiological changes, and other ripening-related changes. Furthermore, the transcript levels of 12 selected representative genes from the differentially expressed genes (DEGs) in the transcriptome analysis were confirmed via quantitative real-time PCR (qRT-PCR). These results add information on the molecular mechanisms of the pre-storage treatments during cold storage of peach fruit. Understanding the genetic response of susceptible cultivars such as ‘Madoka’ to CI-reducing pre-storage treatments would help breeders release CI-resistant cultivars and could help postharvest technologists to develop more CI-reducing technologies.
Han Choi; Min Jeong; Min Baek; Jong Choi; Hee Lee; Cheon Jeong; Shimeles Tilahun. Transcriptome Analysis of Pre-Storage 1-MCP and High CO2-Treated ‘Madoka’ Peach Fruit Explains the Reduction in Chilling Injury and Improvement of Storage Period by Delaying Ripening. International Journal of Molecular Sciences 2021, 22, 4437 .
AMA StyleHan Choi, Min Jeong, Min Baek, Jong Choi, Hee Lee, Cheon Jeong, Shimeles Tilahun. Transcriptome Analysis of Pre-Storage 1-MCP and High CO2-Treated ‘Madoka’ Peach Fruit Explains the Reduction in Chilling Injury and Improvement of Storage Period by Delaying Ripening. International Journal of Molecular Sciences. 2021; 22 (9):4437.
Chicago/Turabian StyleHan Choi; Min Jeong; Min Baek; Jong Choi; Hee Lee; Cheon Jeong; Shimeles Tilahun. 2021. "Transcriptome Analysis of Pre-Storage 1-MCP and High CO2-Treated ‘Madoka’ Peach Fruit Explains the Reduction in Chilling Injury and Improvement of Storage Period by Delaying Ripening." International Journal of Molecular Sciences 22, no. 9: 4437.
Vertical hydroponics farming has emerged as an alternative solution to feed the continuously growing world population. Additionally, recent studies reported that the exogenous treatments of jasmonic acid influence the phytochemical composition of Brassicaceae. We conducted this study to determine the effect of preharvest methyl jasmonate (MeJA) treatment on the phytochemical composition and antioxidant activities of soil- and hydroponically grown pak choi. An aqueous solution of 0.5-mM MeJA was sprayed to saturation on the aerial plant part three days before harvest. The harvested pak choi was freeze-dried and then powdered to measure the antioxidant activity and the contents of chlorophylls (Chls), total phenolics and flavonoids, and glucosinolates (GSLs). The overall results revealed that pak choi grown in vertical hydroponics had higher total Chls and total phenolics than those grown in soil in the greenhouse, regardless of MeJA treatment. Nevertheless, the GSLs content and total flavonoids increased significantly due to MeJA treatment in both growing systems, and the highest values were recorded in hydroponically grown MeJA-treated pak choi. Similarly, the 2, 2-di-phenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity, Trolox-equivalent antioxidant capacity (ABTS), oxygen radical absorbance capacity (ORAC), and ferric-reducing antioxidant power (FRAP) were highest in hydroponically grown MeJA-treated pak choi. Taken together, the preharvest foliar treatment of MeJA can be used to improve the phytochemical composition of pak choi grown in both growing systems. Interestingly, the results strongly support the use of MeJA treatment in the vertical hydroponics growing system compared to the conventional growing system in the soil. This indicates that supplementing the vertical hydroponic growing system with preharvest MeJA treatment could be the best option to improve both the yield per square meter and the quality of pak choi. Besides, MeJA-treated pak choi could be used as a value-added horticultural commodity, as its antioxidant activity increased after treatment. Moreover, after further studies, MeJA could also be applied to other Brassica vegetables to improve their GSL contents and antioxidant properties.
Min Baek; Han Choi; Tifsehit Solomon; Cheon Jeong; Ok-Hwan Lee; Shimeles Tilahun. Preharvest Methyl Jasmonate Treatment Increased the Antioxidant Activity and Glucosinolate Contents of Hydroponically Grown Pak Choi. Antioxidants 2021, 10, 131 .
AMA StyleMin Baek, Han Choi, Tifsehit Solomon, Cheon Jeong, Ok-Hwan Lee, Shimeles Tilahun. Preharvest Methyl Jasmonate Treatment Increased the Antioxidant Activity and Glucosinolate Contents of Hydroponically Grown Pak Choi. Antioxidants. 2021; 10 (1):131.
Chicago/Turabian StyleMin Baek; Han Choi; Tifsehit Solomon; Cheon Jeong; Ok-Hwan Lee; Shimeles Tilahun. 2021. "Preharvest Methyl Jasmonate Treatment Increased the Antioxidant Activity and Glucosinolate Contents of Hydroponically Grown Pak Choi." Antioxidants 10, no. 1: 131.
Glycoalkaloids (GAs) are toxic to humans at higher concentrations. However, studies also suggest the health benefits of GAs depending on the dose and conditions of use. Methods that have been used to determine GA content in potato tubers are destructive and time-consuming and require skilled personnel and high-performance laboratory equipment. We conducted this study to develop indices for the prediction of the level of total GAs in potato tubers at different greening stages based on surface color readings and chlorophyll (Chl) development. Color values (Hunter L*, a*, b*, a*/b*), Chls (Chl a, Chl b, and total Chls) and GA (α-solanine, α-chaconine, and total GAs) content were measured from tubers of ‘Atlantic’ and ‘Trent’ potato cultivars at three-week intervals in up to six greening stages during the storage at room conditions (22 °C, 12-h shift of light-dark cycles). The results have revealed that greening, Chls, and GA content significantly increased for the two cultivars as the stage proceeded. The toxic level of GAs (>200 mg kg−1 FW) was accumulated at the late greening stages, accompanied by the highest Chl content. Finally, indices were developed based on surface color and Chl content for estimation of the safe GA levels for the consumption of the two commercially and commonly used potato cultivars. Moreover, the developed indices could be used as basic information to adapt to other potato cultivars.
Shimeles Tilahun; Hee Sung An; Tifsehit Solomon; Min Woo Baek; Han Ryul Choi; Hee Cheol Lee; Cheon Soon Jeong. Indices for the Assessment of Glycoalkaloids in Potato Tubers Based on Surface Color and Chlorophyll Content. Horticulturae 2020, 6, 107 .
AMA StyleShimeles Tilahun, Hee Sung An, Tifsehit Solomon, Min Woo Baek, Han Ryul Choi, Hee Cheol Lee, Cheon Soon Jeong. Indices for the Assessment of Glycoalkaloids in Potato Tubers Based on Surface Color and Chlorophyll Content. Horticulturae. 2020; 6 (4):107.
Chicago/Turabian StyleShimeles Tilahun; Hee Sung An; Tifsehit Solomon; Min Woo Baek; Han Ryul Choi; Hee Cheol Lee; Cheon Soon Jeong. 2020. "Indices for the Assessment of Glycoalkaloids in Potato Tubers Based on Surface Color and Chlorophyll Content." Horticulturae 6, no. 4: 107.
The glycoalkaloids contents of potato tubers are usually measured by the destructive analysis that consumes time and requires expensive high-performance equipment. This study was carried out to determine the possibility of nondestructive estimation of α-solanine and α-chaconine content in potato tubers. Visible/near-infrared (VIS/NIR) spectra, color values, and the reference α-solanine and α-chaconine were measured from 180 tubers of ‘Atlantic’ and ‘Trent’ potato cultivars with eight replications at two-week intervals during the storage up to ten weeks. The partial least square (PLS) regression method was used to develop models correlating color and spectra data to the measured reference data. Regression coefficient (r) between color variables (Hunter a ∗ , a ∗ / b ∗ , and ( a ∗ / b ∗ )2) and the actual measured values of a-solanine and a-chaconine content were 0.74, 0.62, and 0.62 and 0.70, 0.58, and 0.57, respectively, for the prediction set. Concurrently, equations were developed from color variables in multiple regression with r-values of 0.76 and 0.71 for α-solanine and α-chaconine, respectively. Additionally, the selected PLS model of VIS/NIR spectra had promising predictive power for α-solanine and α-chaconine with r-values of 0.68 and 0.63, respectively, between measured and predicted samples. Taken together, although it requires further studies to improve the prediction power of the developed models, the results of this study revealed the possibility of using VIS/NIR spectra and color variables for the prediction of α-solanine and α-chaconine contents from intact unpeeled potato tubers with chemical-free, fast, and cheap assessment methods.
Shimeles Tilahun; Hee Sung An; In Geun Hwang; Jong Hang Choi; Min Woo Baek; Han Ryul Choi; Do Su Park; Cheon Soon Jeong. Prediction of α-Solanine and α-Chaconine in Potato Tubers from Hunter Color Values and VIS/NIR Spectra. Journal of Food Quality 2020, 2020, 1 -9.
AMA StyleShimeles Tilahun, Hee Sung An, In Geun Hwang, Jong Hang Choi, Min Woo Baek, Han Ryul Choi, Do Su Park, Cheon Soon Jeong. Prediction of α-Solanine and α-Chaconine in Potato Tubers from Hunter Color Values and VIS/NIR Spectra. Journal of Food Quality. 2020; 2020 ():1-9.
Chicago/Turabian StyleShimeles Tilahun; Hee Sung An; In Geun Hwang; Jong Hang Choi; Min Woo Baek; Han Ryul Choi; Do Su Park; Cheon Soon Jeong. 2020. "Prediction of α-Solanine and α-Chaconine in Potato Tubers from Hunter Color Values and VIS/NIR Spectra." Journal of Food Quality 2020, no. : 1-9.
Fruit ripening involves changes in physical, physiological and metabolic activities through the actions of enzymes and regulatory genes. This study was initiated to identify the genes related to the ripening of kiwifruit. Gold ‘Haegeum’ kiwifruit is a yellow-fleshed kiwifruit cultivar usually used for fresh marketing. The fruit is harvested at a physiologically mature but unripe stage for proper storage, marketing distribution and longer shelf life. To identify the differentially expressed genes (DEGs) during ripening, fruit treated with ethylene were compared with control fruit that ripened naturally without ethylene treatment. Firmness, respiration rate, ethylene production rate, total soluble solids (TSS), titratable acidity (TA), brix acid ratio (BAR) and overall acceptability were taken during the study as fruit ripening indicators. Total mRNAs were sequenced by Illumina high-throughput sequencing platform and the transcriptome gene set was constructed by de novo assembly. We identified 99,601 unigenes with an average length of 511.77 bp in transcriptome contigs. A total of 28,582 differentially expressed unigenes were identified in the ethylene treatment vs. control. Of these 28,582 unigenes, 13,361 and 15,221 genes were up- and downregulated, respectively, in the treated fruit. The results also showed that 1682 and 855 genes were up- and downregulated, respectively, more than 2-fold at p < 0.05 in fruit treated with ethylene as compared with the control fruit. Moreover, we identified 75 genes showing significantly different expression; 42 were upregulated, and 33 were downregulated. A possible category of the identified ripening-related genes was also made. The findings of this study will add to the available information on the effect of ethylene treatment on ripening and the related changes of kiwifruit at the genomic level, and it could assist the further study of genes related to ripening for kiwifruit breeding and improvement.
Shimeles Tilahun; Han Ryul Choi; Hyok Kwon; Sung Min Park; Do Su Park; Cheon Soon Jeong. Transcriptome Analysis of ‘Haegeum’ Gold Kiwifruit Following Ethylene Treatment to Improve Postharvest Ripening Quality. Agronomy 2020, 10, 487 .
AMA StyleShimeles Tilahun, Han Ryul Choi, Hyok Kwon, Sung Min Park, Do Su Park, Cheon Soon Jeong. Transcriptome Analysis of ‘Haegeum’ Gold Kiwifruit Following Ethylene Treatment to Improve Postharvest Ripening Quality. Agronomy. 2020; 10 (4):487.
Chicago/Turabian StyleShimeles Tilahun; Han Ryul Choi; Hyok Kwon; Sung Min Park; Do Su Park; Cheon Soon Jeong. 2020. "Transcriptome Analysis of ‘Haegeum’ Gold Kiwifruit Following Ethylene Treatment to Improve Postharvest Ripening Quality." Agronomy 10, no. 4: 487.
In this study, green ‘Hayward’, gold ‘Haegeum’ and red ‘Hongyang’ kiwifruit cultivars were harvested at 160, 170 and 180 days after full bloom (DAFB) and treated with 100 μL kg−1 ethylene to investigate the ripening quality at 25 °C. Significant (p < 0.05) interaction effects between cultivars and harvest times on firmness and firmness related parameters, biochemical parameters, physiological parameters, and overall sensory quality were observed during the study. The results of our study revealed that the ripening quality of kiwifruit cultivars could be influenced by harvest time. During ripening, similar increasing trends were observed for sucrose, glucose, fructose, and total simple sugars until 4 d ripening and maintained or slightly reduced afterward, irrespective of cultivar and harvest time. In addition, based on firmness and firmness related parameters (respiration rate, ethylene production rate, pectins and polygalacturonase (PG) activity), eating quality was attained by gold ‘Haegeum’ and red ‘Hongyang’ on the 2nd day of ripening, whereas green ‘Hayward’ attained eating quality on the 4th day, irrespective of harvest time. However, based on the lowest weight loss to attain eating quality during ripening, which avoids the risk of shriveling, we suggest to harvest red ‘Hongyang’, gold ‘Haegeum’ and green ‘Hayward’ at 160, 170 and 170 DAFB, respectively. The shortest possible harvest time without compromising quality, as observed in this study, could also help growers to reduce production cost and it assists further distributions to consumers.
Shimeles Tilahun; Han Ryul Choi; Do Su Park; Yeon Mi Lee; Jong Hang Choi; Min Woo Baek; Kwon Hyok; Sung Min Park; Cheon Soon Jeong. Ripening quality of kiwifruit cultivars is affected by harvest time. Scientia Horticulturae 2019, 261, 108936 .
AMA StyleShimeles Tilahun, Han Ryul Choi, Do Su Park, Yeon Mi Lee, Jong Hang Choi, Min Woo Baek, Kwon Hyok, Sung Min Park, Cheon Soon Jeong. Ripening quality of kiwifruit cultivars is affected by harvest time. Scientia Horticulturae. 2019; 261 ():108936.
Chicago/Turabian StyleShimeles Tilahun; Han Ryul Choi; Do Su Park; Yeon Mi Lee; Jong Hang Choi; Min Woo Baek; Kwon Hyok; Sung Min Park; Cheon Soon Jeong. 2019. "Ripening quality of kiwifruit cultivars is affected by harvest time." Scientia Horticulturae 261, no. : 108936.
Cherry tomato is a perishable fruit due to its high rate of ethylene production and respiration during ripening. 1-Methylcyclopropene (1-MCP) is known to control ripening and reduce decay of fruit by inhibiting ethylene action. In the present study, the influence of 1-MCP application on quality and storability of ‘Unicorn’ cherry tomato was observed. Fruit at pink and red maturity stages were put in the commercial plastic containers and sealed with 40 μm low density polyethylene (LDPE) film, treated with 1-MCP (0 µL L−1 (control), 0.035 µL L−1 and 0.1 µL L−1), and stored at 10 °C in 85 ± 5% relative humidity (RH). The results indicated that application of 1-MCP at 0.1 µL L−1 significantly affected firmness, cell wall thickness, water soluble pectin, weight loss, surface color, lycopene content and physiological parameters in both pink and red maturity stages compared to 0.035 µL L−1 and control. 1-MCP treatment at 0.1 µL L−1 kept the fruits firmer than 0.035 µL L−1 and the control throughout the storage period for both maturity stages. Cell wall degradation in the control treatment was higher compared to the 0.1 µL L−1 1-MCP treated fruits in both maturity stages throughout the storage period. Results of this study revealed the effectiveness of application of 0.1 µL L−1 1-MCP on quality and shelf life of cherry tomato.
Adanech Taye; Shimeles Tilahun; Mu Seo; Do Park; Cheon Jeong. Effects of 1-MCP on Quality and Storability of Cherry Tomato (Solanum lycopersicum L.). Horticulturae 2019, 5, 29 .
AMA StyleAdanech Taye, Shimeles Tilahun, Mu Seo, Do Park, Cheon Jeong. Effects of 1-MCP on Quality and Storability of Cherry Tomato (Solanum lycopersicum L.). Horticulturae. 2019; 5 (2):29.
Chicago/Turabian StyleAdanech Taye; Shimeles Tilahun; Mu Seo; Do Park; Cheon Jeong. 2019. "Effects of 1-MCP on Quality and Storability of Cherry Tomato (Solanum lycopersicum L.)." Horticulturae 5, no. 2: 29.
This research was conducted to identify the optimum harvest maturity stage/s that yielded the highest nutritional quality and longest marketable shelf-life. “TY Megaton” and “Yureka” cultivars were harvested at the breaker, pink, and red stages and stored up to 20 days at 12°C with 85 ± 5% relative humidity (RH). Quality attributes, the contents of important secondary metabolites, and antioxidant activity were assessed during the storage period. Storing and marketing of tomato fruits up to 3 weeks could be possible. However, a gradually decreasing trend of ascorbic acid and total phenolic content was observed as the maturity stage and storage period proceeded, irrespective of the cultivar. Results of lycopene content and antioxidant activity suggest that better nutritional benefit from the breaker and pink stages could be obtained after 16 and 12 days of storage, respectively, and from the beginning to eighth day of storage for the red stage.
Shimeles Tilahun; Do Su Park; Tifsehit Solomon; Han Ryul Choi; Cheon Soon Jeong. Maturity stages affect nutritional quality and storability of tomato cultivars. CyTA - Journal of Food 2019, 17, 87 -95.
AMA StyleShimeles Tilahun, Do Su Park, Tifsehit Solomon, Han Ryul Choi, Cheon Soon Jeong. Maturity stages affect nutritional quality and storability of tomato cultivars. CyTA - Journal of Food. 2019; 17 (1):87-95.
Chicago/Turabian StyleShimeles Tilahun; Do Su Park; Tifsehit Solomon; Han Ryul Choi; Cheon Soon Jeong. 2019. "Maturity stages affect nutritional quality and storability of tomato cultivars." CyTA - Journal of Food 17, no. 1: 87-95.
This research was conducted to study the gene expression related to the removal of astringency and ripening in astringent ‘Cheongdo-Bansi’ persimmon. Fruit treated with ethylene were used to compare the differentially expressed genes against fruit ripened naturally without ethylene treatment (control). We sequenced total mRNAs using Illumina high-throughput sequencing platform and constructed the transcriptome gene set by de novo assembly. We identified 93,601 unigenes with an average length of 643.2 bp in transcriptome contigs. Differential gene expression analysis was performed and a total of 12,374 unigenes were differentially expressed in the ethylene vs. control. Of these 12,374 unigenes, 6072 were up-regulated and 6302 were down-regulated in the treated fruit. Compared with the control, the number of genes that induced more than 2 fold expression were 2647 and the number of genes whose expression was inhibited more than 2 fold were 2804. We also identified 38 genes showing significantly different expression, 26 of which were up-regulated and the rest 12 genes were down-regulated. The identified genes were categorized as genes related to astringency removal, softening and other ripening-related changes. The present study will add the information on the effect of ethylene treatment for astringency removal, softening and other ripening-related changes of persimmon fruit at genomic level. This study will also contribute important resources for further study of the genes related to astringent substance for persimmon breeding and improvement.
Do Su Park; Shimeles Tilahun; Kyong Cheul Park; Ik Young Choi; Cheon Soon Jeong. Transcriptome analysis of astringent ‘Cheongdo-Bansi’ persimmon fruit treated with ethylene for removal of astringency. Postharvest Biology and Technology 2018, 150, 52 -59.
AMA StyleDo Su Park, Shimeles Tilahun, Kyong Cheul Park, Ik Young Choi, Cheon Soon Jeong. Transcriptome analysis of astringent ‘Cheongdo-Bansi’ persimmon fruit treated with ethylene for removal of astringency. Postharvest Biology and Technology. 2018; 150 ():52-59.
Chicago/Turabian StyleDo Su Park; Shimeles Tilahun; Kyong Cheul Park; Ik Young Choi; Cheon Soon Jeong. 2018. "Transcriptome analysis of astringent ‘Cheongdo-Bansi’ persimmon fruit treated with ethylene for removal of astringency." Postharvest Biology and Technology 150, no. : 52-59.
The objective of this research was to identify the growing medium that yielded the highest nutritional quality and longest marketable shelf life in tomato fruits. ‘TY Megaton’ and ‘Yureka’ cultivars were grown on soil and coir pith in the same climate-controlled glasshouse using a standard nutrient solution and the recommended cultivation practices. Fruits were harvested at the pink stage of ripening and stored at 12 °C in 85 ± 5% relative humidity for 20 days. The fruits of both cultivars grown on either growing medium were of acceptable quality for sale after 3 weeks of storage. The contents of the most important secondary metabolites of tomato responsible for providing their antioxidant activity (ascorbic acid, lycopene, and polyphenols) were not significantly affected by the choice of growing medium; however, significant differences were observed between the cultivars throughout the storage period. The results of this study demonstrated that the choice of cultivar is more important for fruit quality than the growing medium. The lycopene content and antioxidant activity of the fruits suggest that it is possible to achieve optimum nutrition from the pink-stage fruit of both cultivars after 12 days of storage, irrespective of the growing medium used.
Shimeles Tilahun; Mu Hong Seo; Do Su Park; Cheon Soon Jeong. Effect of cultivar and growing medium on the fruit quality attributes and antioxidant properties of tomato (Solanum lycopersicum L.). Horticulture, Environment, and Biotechnology 2018, 59, 215 -223.
AMA StyleShimeles Tilahun, Mu Hong Seo, Do Su Park, Cheon Soon Jeong. Effect of cultivar and growing medium on the fruit quality attributes and antioxidant properties of tomato (Solanum lycopersicum L.). Horticulture, Environment, and Biotechnology. 2018; 59 (2):215-223.
Chicago/Turabian StyleShimeles Tilahun; Mu Hong Seo; Do Su Park; Cheon Soon Jeong. 2018. "Effect of cultivar and growing medium on the fruit quality attributes and antioxidant properties of tomato (Solanum lycopersicum L.)." Horticulture, Environment, and Biotechnology 59, no. 2: 215-223.
This study was conducted to assess the physicochemical changes and overall nutritional implications of greenhouse-grown “TY Megaton” and “Yureka” tomato cultivars under on-vine and postharvest ripening conditions. In the first group, tomatoes were harvested from a vine at the breaker, pink, and red ripening stages and sampled immediately. The second group was harvested at the breaker stage and allowed to ripen under room conditions to the pink and red stages based on color values, similar to the vine-ripened samples. The results of the present study revealed that fresh weight loss was below the maximum acceptable weight loss and firmness was above the minimum limit of marketing after postharvest ripening to the pink and red stages; moreover, this process did not have any deleterious effect on the antioxidant properties or antioxidant activity of the tomatoes. Hence, the results clearly indicate that breaker-stage tomatoes can be postharvest-ripened under room conditions without affecting their marketability and nutritional components.
Shimeles Tilahun; Do Su Park; Adanech Melaku Taye; Cheon Soon Jeong. Effect of ripening conditions on the physicochemical and antioxidant properties of tomato (Lycopersicon esculentum Mill.). Food Science and Biotechnology 2017, 26, 473 -479.
AMA StyleShimeles Tilahun, Do Su Park, Adanech Melaku Taye, Cheon Soon Jeong. Effect of ripening conditions on the physicochemical and antioxidant properties of tomato (Lycopersicon esculentum Mill.). Food Science and Biotechnology. 2017; 26 (2):473-479.
Chicago/Turabian StyleShimeles Tilahun; Do Su Park; Adanech Melaku Taye; Cheon Soon Jeong. 2017. "Effect of ripening conditions on the physicochemical and antioxidant properties of tomato (Lycopersicon esculentum Mill.)." Food Science and Biotechnology 26, no. 2: 473-479.
Do Su Park; Cheon Soon Jeong. Fabrication and optimization of ethylene-producing tablet. Korean Journal of Food Preservation 2016, 23, 162 -165.
AMA StyleDo Su Park, Cheon Soon Jeong. Fabrication and optimization of ethylene-producing tablet. Korean Journal of Food Preservation. 2016; 23 (2):162-165.
Chicago/Turabian StyleDo Su Park; Cheon Soon Jeong. 2016. "Fabrication and optimization of ethylene-producing tablet." Korean Journal of Food Preservation 23, no. 2: 162-165.