Influence  of  1-Methylocyclopropene  (1-McP)   on  the  Quality  and  Storability  of  ‘Red  Jonaprince’   Apples  Stored  in  Different  Conditions

Błaszczyk, Jan; Gasparski, Krzysztof

doi:10.24326/asphc.2019.6.1

Cited by 8 publications

(6 citation statements)

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“…'Conference' pears harvested on the optimal harvest date can be kept for 2 to 4 months in an ordinary cold store and for about 6 months in a CA cold store [31]. Various modern types of cold stores with a controlled atmosphere in which fruit metabolism is maintained on the verge between aerobic and anaerobic respiration as well as the use of substances that slow down the ripening processes, such as 1 MCP, allow one to extend the fruit storage period [32,33], but cannot correct the negative effects of too early or too late harvest. In such cases, even the best technology will not improve fruit quality after a few months [2].…”

Section: Resultsmentioning

confidence: 99%

“…A number of studies have shown that fruit firmness gradually decreases during ripening due to progressive enzymatic degradation of cell wall polymers, alteration in cell wall structure caused by degradation processes (e.g., polygalacturonase) and also polysaccharide degradation, which leads to the breakdown of starch, cellulose and hemicellulose. These changes result in a loss of integrity of the middle lamella, which is rich in pectins that control cell-to-cell adhesion, thus influencing the texture of the fruit [7,33,34,35].…”

Section: Resultsmentioning

confidence: 99%

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Degree Days as a Method to Estimate the Optimum Harvest Date of ‘Conference’ Pears

Łysiak¹

2022

Preprint

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The European pear is a climacteric fruit species characterized by high storability. 'Conference', a pear cultivar very popular on the market, can be stored in a CA room without major losses for half a year. However, for ‘Conference’ storage to be successful, the fruit must be harvested fully developed even before it enters the climatic maturation phase. Harvested too early or too late, pears will taste bad, have physiological disorders and will be poorly storable. Among the various methods used to determine the optimal harvest date, the degree-days method, which relies of the sum of active temperatures, seems to be relatively accurate and easy to apply. During 11 years of study, ‘Conference’ pears were harvested on 4 dates (every 4-5 days) chosen based on measurements and observations, and then, after a six-month storage period, the optimum harvest date was determined. During the growing season, temperature was measured using an automatic weather station to calculate the sum of active temperatures from full bloom to the optimal harvest date. Measurements made after storage were analysed and the sum of active temperatures needed for the proper development of ‘Conference’ pear was calculated to be 2469 degree days. The calculations are very accurate because the dispersion calculated using the standard deviation was only 20 °. The base temperature with the smallest error was 0 °. On the basis of the study results, this method can be recommended as useful for determining the optimal harvest date.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Degree Days as a Method to Estimate the Optimum Harvest Date of ‘Conference’ Pears

Łysiak¹

2022

Preprint

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“…The firmness was assessed according to a previously described method [31] removing the peel, the firmness was measured in duplicate for each sample. Each urement was conducted for opposite sides of the apple.…”

Section: Measurementsmentioning

confidence: 99%

“…The 1-MCP treatments resulting in delayed fruit ripening and the success of 1-MCP technology for apples is associated with the fact that for the apple, the maintenance of 'at harvest' quality is needed and only a moderate softening texture is desirable [29]. Such treatment for 'Red Jonaprince' is commonly applied during storage (postharvest), and such treatment has been shown to delay softening [31]. However, recently, its preharvest application has also been studied and it was indicated that it may allow delayed harvesting and reduce the quality deterioration during storage [32].…”

Section: Introductionmentioning

confidence: 99%

Maintaining the Quality of ‘Red Jonaprince’ Apples during Storage by 1-Methylcyclopropene Preharvest and Postharvest Treatment

et al. 2022

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‘Red Jonaprince’ cultivar production is rapidly increasing; therefore, the interest in harvesting in various regions, as well as in improving and maintaining the quality of the apple, is also increasing. The aim of this study was to analyze the possibility of applying 1-MCP treatment in pre- and postharvest treatment for ‘Red Jonaprince’ apples for maintaining the quality of the apple after Ultra-Low Oxygen (ULO) storage. The studied apples were assessed in four groups: 0—control group without any specific treatment applied; group 1—1-MCP applied preharvest; group 2—1-MCP applied postharvest; group 3—1-MCP applied preharvest and postharvest. Measurements were conducted directly after 3, 5 and 6 months of ULO storage and additionally after 7 days of simulated distribution for each period of storage. The 24 groups obtained (four treatments × three storage periods × two simulated distribution periods) were evaluated for firmness, soluble solids content (SSC) and titratable acidity (TA). No statistically significant impact on the SSC of ‘Red Jonaprince’ for all groups was stated (p > 0.05), while for the firmness and TA values, there was a statistically significant impact of applied treatment (ULO storage period and simulated distribution) (p < 0.05). Longer ULO storage as well as longer simulated distribution were associated with decreasing firmness and decreasing TA of apples (p < 0.05). For samples subjected to 1-MCP treatment postharvest and those subjected to 1-MCP treatment preharvest and postharvest combined, the apples in the majority of analyses were protected against decreasing firmness and decreasing TA. It may be concluded that postharvest 1-MCP treatment applied for ‘Red Jonaprince’ apples allows maintaining its quality parameters, including firmness and TA of fruits. Taking this into account, our recommendation is that the postharvest 1-MCP treatment should be sufficient, in order to avoid unreasonable management of 1-MCP, which is not justified to be applied preharvest, or preharvest and postharvest combined, for ‘Red Jonaprince’ apples.

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“…Among promising options to apply is the use of 1-Methylcyclopropene (1-MCP) during storage (postharvest), which has been proven to delay the softening of Red Jonaprince apples [11]. However, the 1-MCP was studied in the preharvest period as a novel option to maintain the eating quality [12] and enable delayed harvesting [13].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Possibility to Apply Preharvest 1-Methylcyclopropene (1-MCP) Treatment to Delay Harvesting of Red Jonaprince Apples

et al. 2020

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The production of Red Jonaprince cultivar is increasing, but the quality of apples is still challenging. Therefore, various options may be used including 1-Methylcyclopropene (1-MCP) application, as it influences ethylene receptors and blocks them, resulting in the possibility of delaying harvesting. The preharvest application of 1-MCP has not been studied so far for this cultivar but for other ones it has been successful, as it is based on the understanding of the natural apple ripening process. The study aimed to analyze the possibility of applying a 1-MCP treatment in the preharvest period for Red Jonaprince apples. The study was conducted based on a comparison of apples from two groups of Red Jonaprince apple trees (4 years) cultivated in an experimental orchard, where for one of them 1-MCP was applied in the preharvest period (HarvistaTM; 150 g per ha; 20 September—12 days before the optimum harvesting window (OHW)). For both groups, the apples were studied twice, for harvesting in the OHW (2 October) and for delayed harvesting (24 October). The harvested fruits were stored in an Ultra Low Oxygen chamber (ULO; 1.2% CO2, 1.2% O2) until May. They were analyzed before storage (preharvest) five times (20 September–24 October) and after storage (postharvest) three times (20 March–18 May). The following parameters were included: firmness, total soluble solids (TSS) content, titratable acidity (TA). For the preharvest period, the parameters also included internal ethylene content (IEC), starch index, and Streif index. For the preharvest period, significant differences associated with the 1-MCP treatment (p ≤ 0.05) were observed for the IEC (lower results for apples treated for 4th and 5th assessment), TA (higher results), and Streif index (higher results). Meanwhile, for firmness, TSS, and starch index for the majority of measurements there were no differences (p > 0.05). For the postharvest period, significant differences associated with 1-MCP treatment (p ≤ 0.05) were observed for firmness (higher results) and TA (higher results) both for OHW and delayed harvesting. It was concluded that a preharvest 1-MCP treatment allowed delayed harvesting and reduced the quality deterioration during the ULO storage of Red Jonaprince apples.

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Influence of 1-Methylocyclopropene (1-McP) on the Quality and Storability of ‘Red Jonaprince’ Apples Stored in Different Conditions

Cited by 8 publications

References 0 publications

Degree Days as a Method to Estimate the Optimum Harvest Date of ‘Conference’ Pears

Degree Days as a Method to Estimate the Optimum Harvest Date of ‘Conference’ Pears

Maintaining the Quality of ‘Red Jonaprince’ Apples during Storage by 1-Methylcyclopropene Preharvest and Postharvest Treatment

Analysis of Possibility to Apply Preharvest 1-Methylcyclopropene (1-MCP) Treatment to Delay Harvesting of Red Jonaprince Apples

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