苹果酸对采后杏果实品质和活性氧代谢的影响  

Effects of Malic Acid Treatment on Quality and Active Oxygen Metabolism of Postharvest Apricot Fruits

作　　者：石慧敏 任新雅 张昱 刘志旭 马亚萱 赵亚婷 朱璇 SHI Huimin;REN Xinya;ZHANG Yu;LIU Zhixu;MA Yaxuan;ZHAO Yating;ZHU Xuan(College of Food Science and Pharmacy,Xinjiang Agricultural University,Urumqi 830052,China)

机构地区：[1]新疆农业大学食品科学与药学学院,新疆乌鲁木齐830052

出　　处：《食品工业科技》2024年第22期289-296,共8页Science and Technology of Food Industry

基　　金：新疆维吾尔自治区自然科学基金资助项目(2022D01A196);南京农业大学-新疆农业大学联合基金项目(KYYJ201908)。

摘　　要：为研究外源苹果酸(Malic acid,MA)对采后杏果实抗氧化代谢及品质的影响,以‘赛买提’杏为试材,分别采用5、10和15 mmol/L的MA浸泡果实10 min,随后将果实置于0±1℃下,RH为90%~95%冷库贮藏49 d,每隔7 d测定杏果实硬度、可溶性固形物含量、可滴定酸含量、腐烂率及抗氧化代谢相关指标。结果表明:MA处理能减缓杏果实贮藏期间硬度、可滴定酸和可溶性固形物含量的下降,明显减少杏果实贮藏期间腐烂的发生,其中以10 mmol/L MA处理效果最佳。进一步研究表明,苹果酸处理明显提高了杏果实贮藏期间超氧化物歧化酶、过氧化氢酶、过氧化物酶、抗坏血酸过氧化物酶、谷胱甘肽还原酶活性,降低了超氧阴离子自由基的产生速率和过氧化氢含量,抑制了抗坏血酸、谷胱甘肽、总酚和类黄酮含量的下降,以及丙二醛含量的上升,较长时间保持了细胞膜完整性。说明MA处理对采后杏果实品质的保持与其调控活性氧代谢密切相关。In order to investigate the effects of exogenous malic acid(MA)on antioxidant metabolism and quality of postharvest apricot fruits,apricot'Saimaiti'was used as experimental material.The apricot fruits were soaked in 5,10 and 15 mmol/L MA for 10 min.The treated apricot fruits were stored at 0±1℃and 90%~95%relative humidity for 49 days.The firmness,soluble solids content,titratable acid content,decay rate and antioxidant metabolism of apricot fruits were measured every 7 days.The results showed that MA treatment slowed down the decrease of hardness,titratable acid and total soluble solids contents.MA treatment with 10 mmol/L had the best effect.Further research showed that malic acid treatment significantly increased the activities of superoxide dismutase,catalase,peroxidase,ascorbate peroxidase and glutathione reductase during storage of apricot fruits.It decreased the production rate of superoxide anion radical and the content of hydrogen peroxide,inhibited the decrease of ascorbic acid,glutathione,total phenolics and flavonoids,and increased the content of malondialdehyde.The integrity of cell membrane was maintained for a long time.These results indicate that MA treatment is closely related to the maintenance of postharvest apricot fruit quality and its regulation of active oxygen metabolism.

关 键 词：杏 冷藏 苹果酸 抗氧化代谢 品质 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]