Effect of nitric oxide treatment on senescence and enzymes to scavenge free radical of postharvest peach fruit

Peach fruit were fumigated with 0,5,10,20 and 30 μL / L nitric oxide( NO) respectively,to study the effect of NO on the senescence and enzymes to scavenge free radical of postharvest peach.The results showed 10 μL / L NO treatment could effectively inhibit fruit soften and enhance superoxide dismutase( SOD),ascorbate peroxidase( APX),dehydroascorbate reductase( DHAR),monodehydroascorbate reductase( MDHAR) activity and ascorbate( ASC) content. In conclusion,NO treatment at proper concentration( 10 μL/L) could advance the antioxidant capacity,restrain the peroxidation of membrane lipid and maintain the membrane integration,NO treatment could improve the storage quality of peach fruit.