Effect of the ethylene on the peach fruit quality and relative physiological mechanism during the MA storage and shelf life

【Objective】 The study was to research the relationship between the ethylene and the chilling injury.【Method】 'Okubo'peach fruit was used as our materials.Four different treatments(polyethylene packaging without ethylene treatment;5-10 μL/L exogenous ethylene treatment;10-20 μL/L exogenous ethylene treatment;1-methylcyclopropene treatment and polyethylene packaging with ten holes) were devised in low temperature MA(modified atmosphere) storage stage and 20 ℃ shelf life stage.We evaluated the effects of these treatments on the rot velocity,firmness,soluble solid content,Vc content,conductance,ethylene production and respiration intensity change.【Result】 The results showed that 5-10 μL/L exogenous ethylene treatment can keep the fine quality of peach fruit until the middle stage of the MA storage,keep its normal respiration and ethylene release,higher soluble solid and Vc content,higher membrane permeability,and lower firmness;10-20 μL/L exogenous ethylene treatment was similar to the 5-10 μL/L exogenous ethylene treatment,but its rot velocity rate was higher than the 5-10 μL/L exogenous ethylene treatment;1-MCP(1-methylcyclopropene)treatment had a later lower ethylene release fastigium than other treatments during the MA storage and 3-day shelf life,and it had a lower respiration velocity,lower membrane permeability,a higher soluble solid and Vc content.1-MCP treatment lost the ability of normal softening even at 20 ℃ at the late period of storage.The airtight PE treatment was better than CK,its rot velocity was lower,its respiration intensity and ethylene release were lower,and its Vc and SSc content were low,its quality was worse during the MA late storage.The impact of the comparison CS was the worst,its rot velocity was the highest,its respiration intensity and ethylene release were the lowest,and its Vc and SSC content were low,so its quality was the worst during the late MA storage.【Conclusion】 In a word,5-10 μL/L exogenous ethylene treatment was the best,and it can keep the peach fruit excellent quality during the front and middle storage.