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Effects of Hydrocooling and 1-MCP Treatment on the Quality Changes of Peach Fruit during Storage
Aditya Nurmalita Pervitasari,Jong-Hyun Kim,Kyeongsuk Cho,Dasom Choi,Seok Kyu Yun,Daeil Kim,Dong-Hwan Kim,Jongkee Kim 한국원예학회 2021 원예과학기술지 Vol.39 No.6
We investigated quality changes during storage in white peach (Prunus persica (L.) Batsch; cv. ‘Mibaekdo’) and yellow peach (cv. ‘Janghowon Hwangdo’) to estimate single and combined effects of hydrocooling and 1-methylcyclopropene (1-MCP) treatment to extend shelf life. Fruit at the optimum maturity with green background 60 ± 10% were harvested and subjected to hydrocooling by immersing fruit into a water tank generating micro-bubbles for 40 min at 0℃ and/or a 3 μl·L<SUP>-1</SUP> of 1-MCP treatment for 12 hrs, followed by storage at 10℃. In both cultivars, ethylene production was lowest from fruits treated with 1-MCP and hydrocooling (combined treatment) compared to the individual treatments as well as control fruit throughout storage. The firmness of the control fruit decreased rapidly from about 35 N at harvest to about 8 N on the 8<SUP>th</SUP> day of storage, but fruit in the combined treatment remained much firmer for at least 4 days after treatment. Total soluble solids content was also significantly higher at least 4 days after treatment in ‘Mibaekdo’ fruit applied with the combined treatment, whereas ‘Janghowon Hwangdo’ fruit did not display an obvious positive effect by the combined treatment. The titratable acidity of the ‘Mibaekdo’ fruit was also lower in the combined treatment, whereas ‘Janghowon Hwangdo’ showed similar levels among treatments. Removal of trichomes from peach fruit by micro-bubbled hydrocooling can also enhance the marketability of the fruit by eliminating allergy-like responses from customers to the fruit. The results obtained in the present study suggest that hydrocooling followed by 1-MCP application to peach fruit maintains firmer flesh and extends the shelf-life by at least 4 days, therein improving marketability.
Baskoro Dwi Nugroho Adji,Choi Peter,Pervitasari Aditya Nurmalita,한나래,Kim Jongkee,Kim Dong-Hwan 한국원예학회 2024 Horticulture, Environment, and Biotechnology Vol.65 No.2
The production of double haploids (“DH”) by microspore-derived embryos is one of the best breeding methods to generate new varieties with better traits and stable genetic background. In the previous study, radish ‘DH’ lines were generated with a diff erent range of glucosinolate (GSL) contents, ranging from low to high levels of GSL. In this study, we performed metabolic and transcriptional profi ling to elucidate the regulatory system behind the GSL biosynthesis process using the ‘DH’ radish lines. Four individual ‘DH’ lines were selected, of which two lines named ‘HH’ had high GSL content, while the other two lines, ‘LL’, had low GSL content. HPLC analysis in the vegetative (leaf and root) and reproductive tissue (seed) was detected seven GSL compounds from radish. Among seven GSLs, glucoraphasatin (GRH) occupied the largest proportion of total GSLs in both leaf and root tissues, while glucoraphenin (GRE) was taking a place as the major GSL in radish seeds. Six major genes ( RsBCAT4, RsIPMDH1, RsCYP79F1, RsCYP83A1, RsUGT74B1 , and RsGRS1 ) represent ing the major biosynthesis of aliphatic GSLs were selected for qRT-PCR analysis. Heat map analysis based on Pearson correlation coeffi cient showed that RsBCAT4, RsIPMDH1, RsCYP79F1 , and RsCYP83A1 were positively correlated with the amount of GRH in leaf tissue. Meanwhile, RsGRS1 showed a strong correlation with the amount of GRH and total aliphatic GSLs in both leaf and root tissues. By using the ‘DH’ radish lines, this study revealed that regardless of tissues of radish, accumulation of total GSL is strongly aff ected by the RsGRS1 and also positively supported by the other bio synthetic genes like RsBCAT4, RsIPMDH1, RsCYP79F1 , and RsCYP83A1 .