Effect of Application Timing of Deastringency and 1-Methylcyclopropene Treatments on Fruit Quality Attributes and Physiological Disorders of Two Astringent Persimmon Cultivars during Cold Storage

Abstract

Astringent persimmon (Diospyros kaki Thunb.) fruit are treated with high levels of CO 2 or alcohol treatments to remove bitterness, but additional treatments are needed to maintain fruit firmness for long-term cold storage. Currently, 1-methylcyclopropene (1-MCP) is widely employed to maintain fruit firmness during cold storage. The objective of this study was to evaluate the effects of application timing of a combination of deastringency and 1-MCP treatments on fruit quality attributes and the incidence of physiological disorders in the cold-stored astringent persimmon fruit of two cultivars, 'Tonewase' and 'Sangjudungsi'. Fresh weight loss gradually increased in 'Tonewase', regardless of the timing of the deastringency and 1-MCP treatment. However, the 1-MCP treatment alone resulted in the smallest loss of fresh weight compared with the other treatments in 'Sangjudungsi'. Fruit firmness was highly maintained by the 1-MCP treatment, regardless of cultivar and application timing. Furthermore, the soluble solids content (SSC) was not affected by the 1-MCP treatment, but was significantly reduced by the deastringency treatment. The SSC was highly retained in 'Sangjudungsi'. The variation in various color variables was greater in 'Sangjudungsi' fruit than in 'Tonewase' fruit. Compared with the other treatments, the combination of 1-MCP and deastringency treatments significantly reduced all color variables at both of the peel regions of 'Tonewase' fruit. Fruit softening, decay, and wilting rates were highest in the combined 1-MCP and deastringency treatments in 'Tonewase' fruit. On the other hand, 'Sangjudungsi' was relatively less susceptible to physiological disorders during cold storage. Overall, our results show that astringent persimmon cultivars require individually-tailored management techniques immediately before cold storage to retain fruit quality.

Effect of Salicylic Acid and 1-Methylcyclopropene Treatments on Fruit Quality and Cell Wall Hydrolases of ‘Hwangok’ Apples During Cold and Shelf-life Storage

“…However, these processes may be delayed by 1-MCP and SA+1-MCP treatments according to the present results. A similar result was observed in 1-MCP-treated fruits (Zucoloto et al, 2017;Yoo et al, 2019aYoo et al, , 2019b. However, SA did not delay pigment changes during ripening.…”

Traits and Gene Expression Analysis of Early and Late Ripening Pollination Constant Non-Astringent Persimmon Fruits at Different Developmental Phases

“…감에서는 RNA sequencing(RNA-seq)을 이용한 전사체 분석 (Kim et al, 2017)을 통해 aldehyde dehydrogenase(ALDH) 2 유전자가 alcohol dehydrogenase(ADH), pyruvate decarboxylase(PDC) 유전자와 함께 감 탈삽 (Yoo et al, 2019;에 중요한 기능을 한다는 것과, miR395p-3p와 miR858b가 각각 basic helix-loop-helix(bHLH)와 myeloblastosis (MYB)를 조절함으로써 감의 탈삽을 조절하는 miRNAs임이 보고되었으며 (Luo et al, 2014;Luo et al, 2015), Jung et al(2017) 최적의 de novo assembly를 선택하기 위해 8가지의 hash length (k-mer = 51, 55, 57, 59, 61, 63, 65, 71) (Gupta et al, 2015). 또한 본 결과는 탄수화물 대사 관련 유전자 발현 양상 탄수화물 대사 관련 유전자로 Sucrose synthase 등 8개의 유전자에 대한 발현양상을 비교분석 하였다(Fig.…”