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杧果(Mangifera indicaL.)栽培品种‘圣心’采前套袋果实采后经5mmol·L-1草酸溶液浸泡10min后常温(25℃)下贮藏,期间果实硬度系数、病情指数、腐烂率、黄化都显著低于对照;其中,处理果实果皮的还原型抗坏血酸(AsA)和还原型谷胱甘肽(GSH)含量保持较高,抗坏血酸氧化酶(APX)和谷胱甘肽还原酶(GR)活性在贮藏9d后提高,同时,超氧阴离子()生成速率、过氧化氢(H2O2)含量和丙二醛(MDA)含量降低,说明草酸处理可通过提高果皮AsA-GSH循环系统中抗氧化酶活性和抗氧化剂水平来增强清除活性氧自由基(ROS)能力,减轻膜脂过氧化伤害,进而有利于延缓套袋杧果采后成熟衰老进程,提高果实的商品率。
The bagged fruits of Mangifera indica L. cultivated variety Sacred Heart were stored at room temperature (25 ℃) for 10min after being immersed in 5mmol·L-1 oxalic acid solution for 10min. The fruit firmness index, disease index, decay rate, Yellowing were significantly lower than the control; Among them, the content of reduced ascorbic acid (AsA) and reduced glutathione (GSH) remained high in the pericarp of the fruit, ascorbate oxidase (APX) and glutathione reductase ) Activity increased after 9 d of storage, meanwhile, the generation rate of superoxide anion (), the content of hydrogen peroxide (H2O2) and the content of malondialdehyde (MDA) decreased, indicating that oxalic acid treatment could improve the activity of AsA-GSH Oxidase activity and antioxidant levels to enhance the ability to scavenge reactive oxygen species (ROS), reduce membrane lipid peroxidation damage, and thus help to delay bagging ripening aging process post-harvest fruit, improve the commercial rate of fruit.