1-MCP Improved Diverse Sensorial, Biochemical and Physical Apple Traits during Cold Storage Based on Cultivar

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Apple cultivars’ storability could be strengthened through known techniques of cold storage, advanced industries of control atmosphere or other routine usages like fruit pre-cooling followed by immersion in CA++ solution, depending on genetic potential of the plant material. At the end of pomology and cold storage assessments of 93 apple cultivars, two high yielding native "Dirras-e Mashhad" and "Wealthy" were treated by single and combined 1-MCP and ethylene nano-absorbent (ENA) to assess eventual improvements in cold storage span, fruit eating quality and role of cultivar. For this purpose, directs effects and interactions between all sources of variance were studied. Ethylene emission and CO2 amounts were measured. The results showed that reduced weight loss and flesh firmness, were registered in the treated samples of both cultivars compared with the control. Using of 1-MCP affected significantly  (p < 0.05) TSS (Total Soluble Solids), pH and TA (Titratable Acidity). 1-MCP inhibited rise of the fruit pH, decreasing also the level of TA during storage, while using of ethylene nano-absorbent showed no significant effect (p > 0.05) on these characteristics. The native apple "Dirras-e Mashhad" showed higher pH value than "Wealthy" under the combined treatment (ENA+1-MCP). Genetic source revealed significant difference through lower "Wealthy" storability. Ethylene emission increased to 53.64 ppm/Kg·hr after 5th month, which resulted in significant difference at p > 0.01 level related to the initial value of 3.26 ppm/Kg∙hr. The combined treatment (ENA+1-MCP) affected significantly (p < 0.05) most of the fruit characteristics in both of the cultivars. The treatments demonstrated different results by cultivar.

B. Pashazadeh
H. Hajnajari
F. Shavakhi
Agricultural Sciences