Effect of nitric oxide treatment on postharvest quality of Xin Jiang ‘Jia Shi'Muskmelon fruit

Effects of nitric oxide treatment on postharvest Physiology of ‘Jia Shi'Muskmelon fruit were investigated in this study.Jiashi Muskmelon were treated with 40, 60, 80μL / L nitric oxide ( NO) fumigation 3h, then stored in cold storage ( 5 ± 0.5℃) and observed the treatment effect. Changes in these levels of weight- loss rate, firmness of friuts, soluble solids ( TSS) , titratable acid ( TA) , respiration rate and ethylene production, superoxide dismutase ( SOD) , peroxidase activity ( POD) , catalase ( CAT) were measured during storage, in order to screened NO appropriate concentration of Jiashi Muskmelon. The results showed that under the three different of NO concentrations, 60μL / L NO treatment could better maintain Jiashi Muskmelon fruits hardness, slow the rise in the rate of weight loss; inhibit the soluble solids, titratable acid content; suppress the respiration rate and ethylene production of fruit; reduce the content of MDA. The 60μL / L NO treatment was able to significantly induce SOD, POD, CAT activity increased, enhance the antioxidant capacity of fruits.