EFFECT OF 1-METHYLCYCLOPROPENE AND ULO CONDITIONSON BIOACTIVE COMPOSITION AND ORGANOLEPTIC PROPERTIES OF APPLES DURING STORAGE

The aim of this study was to analyze the effect of the use of an agent inhibiting ethylene release - 1-Methylcyclopropene in the storage of selected apple varieties 'Szampion', 'Gloster', 'Elstar', 'Ligol', 'Idared', 'Jonagold', and 'Honeygold' originating from orchards of the Fruit Plant in Wtelno and stored in chambers with a controlled atmosphere. Laboratory analyzes were performed immediately after harvest and after 6 months of storage in chambers under ULO conditions (<2% O2, <2% CO2) at a tem-perature of 1.5-2.0°C and relative air humidity of 95-96%. Fruits treated with 1-MCP were characterized by significantly lower losses of bioactive compounds, especially vitamin C, compared to untreated apples. The contents of total polyphenols and chlorogenic acid remained at a similar level as after harvest in untreated apple samples. After the storage peri-od, the 'Szampion' variety contained significantly the most polyphenolic compounds, and the least - the 'Honeygold' variety, where the highest de-crease was also recorded during storage (26.7%) in fruits not treated with 1-MCP. After storage, the 'Ligol' and 'Elstar' cultivars had the significant-ly highest content of chlorogenic acid. The highest losses of chlorogenic acid during apple storage (32.4%) were observed in the 'Honeygold' vari-ety. The lowest loss of ascorbic acid during ...