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

Abstract

‘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.

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

“…Ripeness is usually considered readiness for harvest. Numerous changes such as seed maturation, change in colour, abscission from the parent plant, texture softening, production of flavour volatiles, wax development on the skin, tissue permeability, and change in carbohydrate composition are measurable and many of them were considered in the decision about harvest [44,45,46,47]. However, due to a large number of variables, the end result is unpredictable for such fruits as pears intended for long-term storage.…”

Effects of High-Pressure Homogenization Treatment on the Development of Antioxidant Zanthoxylum bungeanum Leaf Powder Films for Preservation of Fresh-Cut Apple

“…The test was conducted following the instructions of the instrument. Ten random apple slice samples were selected under each storage condition, and the hardness of the fresh-cut apples was measured to obtain an average value [ 28 ].…”

Effect of Storage Conditions on the Volatilome, Biochemical Composition and Quality of Golden Delicious and Red Delicious Apple (Malus domestica) Varieties

“…Titratable acidity was determined by titrating 10 mL of diluted juice in 100 mL of distilled water, with 0.1 N sodium hydroxide solution, to pH = 8.2. The results were expressed in g of malic acid/100 mL [97]. pH was determined in apple juice using a Jenway 3310 pH meter (Cole-Parmer Instrument Co., Ltd., Saint Neots, UK).…”