The Influence Of Postharvest ASM Treatments On Ethylene Metabolism And Aroma Release Of ’Yujinxiang’ Muskmelon

Acibenzolar-S-methyl(ASM), a synthetic chemical elicitor of salicylic acid, can inducedisease resistance in a variety of fruits and vegetables.Muskmelon(Cucumis melo L.cv.Yujinxiang) fruits were treated with0.1g/L ASM for10min to study the effects of ASMtreatment on fruit ethylene metabolism and the release of volatile substances.The resultsindicated as follows:1."Yujinxiang" Melon is a climacteric fruit, had typical release peak of ethylene.ASMtreatment inhibits the release of ethylene fruit. The ACC, ACS activity and the ACO activityin Peel and flesh tissue were correspond with ethylene production, were lower than thecontrol group, and the peak has been earlier.2. The initial fruit storage, aldehydes and alcohol-based were main part, the content ofesters was less in flesh and peel tissue. content with the extension of storage time, totalvolatile substances, esters gradually increased, aldehydes decreased gradually, estersgradually become the main volatile substances. After the ASM process fruits tissue (flesh andpeel) and total volatile substances esters, alcohols, aldehydes have been suppressed.3. During fruit storage, ethylene of control group peaked at6th day, followed by totalvolatile substances peaked of flesh and peel tissues. After ASM treatment, ethylene releasepeaked at4th day, volatile substances and esters release peak of fruits changed, and thenpeaked. Aldehydes decreased more significantly, the content of esters was found to furtherincrease. The alcohols and aldehydes of fruits gradually transforms esters.4. During fruit storage, the hardness decreased, MDA gradual accumulation, membraneintegrity decreased, and the soluble solids content showed a downward trend after the firstrise. ASM treatment reduced the respiration rate, so that the fruit soluble solids contentincreased, while, ASM treatment also delayed the the down rate of fruitfirmness and cellmembrane integrity rate, slowing the accumulation of MDA content.In conclusion, ethylene can promote the release of volatiles released. The ethylenerelease of ASM postharvest treatment group can be suppressed by inhibiting the ethylenemetabolic pathway substrate and the activity of enzyme, which further influence the release ofvolatile substances in the fruit.