一氧化氮熏蒸对冬枣采后贮藏品质的影响

Effect of Treatment with Nitric Oxide Fumigation on Storage Quality of Postharvest Winter Jujube Fruit

试验旨在研究不同浓度NO熏蒸处理对冬枣采后贮藏品质的影响。以白熟期冬枣为试验材料,分别以0,50, 100, 150和200μL/L一氧化氮(Nitric oxide, NO)气体熏蒸处理2 h后,在0±1℃条件下贮藏80 d。观察贮藏期果实阶段性的外观变化,同时分析测定其腐烂指数、失重率、硬度、可溶性固形物、呼吸强度和细胞膜渗透率的变化。结果表明:NO处理(浓度为50～200μL/L)能够不同程度地减轻白熟期冬枣果实表面出现腐烂斑点和软腐情况;降低果实的腐烂指数、失重率和细胞膜渗透率;抑制果实的呼吸强度;较好地保持果实的硬度和可溶性固形物的含量。在NO浓度为50～200μL/L范围内熏蒸对白熟期冬枣采后的贮藏品质有不同影响,其中以150μL/L处理2 h后在0±1℃条件下贮藏效果最好,贮藏期延长,腐烂指数降低,失重率降低,硬度保持较好,可溶性固形物含量维持较好,能抑制冬枣采后贮藏过程中的呼吸强度、抑制细胞膜渗透率的上升。

The effects of treatment with nitric oxide fumigation on postharvest quality of winter jujube during storage were investigated in this study.Winter Jujube fruit in white mature period was used as the experimental material.Winter Jujube fruit was fumigated with different concentrations of nitric oxide gas(0,50,100,150,and 200μL/L)for 2 h under the oxygen environment and stored under 0±1℃.The changes of fruit appearance were observed,and the decay rate,weightlessness rate,hardness,soluble solids,respiration intensity and cell membrane permeability of fruits were analyzed.The result showed that the appearance of mildew and soft rot on the appearance of fruit were alleviated,the rot rate,weight loss rate,and cell membrane permeability of fruit were reduced,the respiratory intensity of fruit was inhibited,and the hardness and the soluble solids contents of fruit were better maintain with NO treatment.The NO concentrations of 50-200μL/L range fumigation white mature period of winter jujube after harvesting storage quality have different influence.The NO treatment with the concentration of 150μL/L was significantly better than that of other treatment groups,processing at 0±1℃after 2 h,the storage period was prolonged,the decay index decreases,the weight loss rate was reduced,the hardness was better,the soluble solid content was maintained well,and the soluble solid content remains good.It could inhibit the respiration intensity and inhibit the increase of cell membrane permeability during the postharvest storage of winter jujube.