The Influence of 1-Methylcyclopropene on Fruit Quality of “Granny Smith” Apple Cultivar Depending on Applied Concentration and Storage Conditions | Uticaj 1-metilciklopropena na kvalitet plodova jabuke sorte „Granny smith“ u zavisnosti od primenjene koncentracije i uslova čuvanja
2017
Magazin, Nenad | Keserovic, Zoran | Milic, Biserka | Miodragovic, Maja | Tarlanovic, Jelena
The paper presents the results of 1-methylcyclopropene (1-methylcyclopropene, 1- MCP) influence on fruit quality of “Granny Smith” apple cultivar. 1-MCP is an inhibitor of ethylene action which binds to the receptors of ethylene and thus delays the maturity of fruit, and prolongs their storage. 1-MCP is applied in a period of 5 days after harvest at concentrations of 0, 500, 1000 and 2000 ppb, each with and without the presence of exogenous ethylene from other ripe apples. After treatment, the fruits were stored in cold storage with controlled atmosphere (CA) in two separate chambers with different composition of the gases. Fruits analyses were made immediately after CA storage, after additional storage in normal atmosphere, and after room temperature shelf life. The results showed that 1- methylcyclopropene can significantly help preserve the quality of apple during cold storage. Irrespective of the applied concentration 1-MCP significantly affects retention of fruit firmness even during shelf life, and also affects the total acids (TA) content in the treated fruits by slowing down drop of TA compared to untreated fruits. There was no treatment effect on total soluble solids content. All tested concentrations of 1-MCP effectively suppress the occurrence of superficial scald in circumstances where the treatment is carried out in the chamber without the presence of other apple cultivars. In the case where the treatment is done in presence of exogenous ethylene 1-MCP has not prevented scald occurrence. A concentration of 500 ppb has not yielded satisfactory results with all investigated parameters, while a concentration of 1000 ppb is recommended to be used. The concentration of 2000 ppb gives the same results as 1000 ppb and there is no justification for its application.
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