一氧化氮对新疆伽师瓜果实采后贮藏品质的影响

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

以新疆伽师瓜为试材,研究不同浓度一氧化氮(NO)熏蒸处理对伽师瓜果实采后品质的影响。分别采用40、60、80μL/L NO熏蒸处理伽师瓜果实3h,贮藏于低温冷库(5±0.5℃)中。通过失重率、硬度、可溶性固形物(TSS)、可滴定酸、呼吸速率、乙烯释放量、丙二酸(MDA)及超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性变化的测定,筛选出NO处理伽师瓜的适宜浓度。结果表明,60μL/L NO处理能较好地保持伽师瓜果实的硬度,延缓失重率的上升;抑制可溶性固形物、可滴定酸含量的下降;抑制果实的呼吸速率、乙烯释放量;降低MDA的含量;能够明显地诱导SOD、POD、CAT活性的增加,增强果实的抗氧化能力。

Effects of nitric oxide treatment on postharvest Physiology of ＇ JiaShi＇ 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 Ioss; 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.