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当前位置: 首页 > 文章 > 甜菜碱处理对枇杷果实采后冷害和活性氧代谢的影响 食品科学 2014,35 (14) 210-215
Position: Home > Articles > Effect of Glycine Betaine Treatment on Postharvest Chilling Injury and Active Oxygen Metabolism in Loquat Fruits FOOD SCIENCE 2014,35 (14) 210-215

甜菜碱处理对枇杷果实采后冷害和活性氧代谢的影响

作  者：
孙玉洁;金鹏;单体敏;许佳;郑永华
单  位：
南京农业大学食品科技学院
关键词：
枇杷果实;冷害;甜菜碱;活性氧
摘  要：
以‘解放钟’枇杷果实为试材,研究甜菜碱处理对冷藏枇杷果实活性氧代谢的影响。结果表明,10 mmol/L甜菜碱处理能有效减轻枇杷果实果心褐变,抑制相对电导率和丙二醛含量的上升,保持较低水平的O2-·和H2O2含量。此外,甜菜碱处理可提高枇杷果实过氧化氢酶、抗坏血酸过氧化物酶和超氧化物歧化酶的活性,抑制多酚氧化酶、过氧化物酶活性的升高,保持果实内较高的总酚和总黄酮含量。结果表明,甜菜碱处理可维持枇杷果实活性氧代谢平衡,减少膜质过氧化与损伤,保护膜结构的完整,从而减轻冷藏过程中的冷害症状,延长果实贮藏期。
译  名：
Effect of Glycine Betaine Treatment on Postharvest Chilling Injury and Active Oxygen Metabolism in Loquat Fruits
作  者：
SUN Yu-jie;JIN Peng;SHAN Ti-min;XU Jia;ZHENG Yong-hua;College of Food Science and Technology,Nanjing Agricultural University;College of Biosystem Engineering and Food Science,Zhejiang University;
关键词：
loquat;;chilling injury;;glycine betaine;;active oxygen
摘  要：
The effect of 10 mmol/L glycine betaine(GB) treatment on active oxygen metabolism in loquat fruits(Eriobotrya japonica Lindl. cv. Jiefangzhong) during cold storage was investigated. The results showed that GB treatment effectively reduced internal browning,inhibited the increase of electric conductivity and malonaldehyde(MDA) content,maintained the low level of superoxide anion(O2-·) production and hydrogen peroxide(H2O2) content. Moreover,GB treatment enhanced the activities of catalase(CAT),ascorbate peroxidase(APX) and superoxide dismutase(SOD) and inhibited the activities of polyphenol oxidase(PPO) and peroxidase(POD). High levels of total phenols and total flavonoids were also observed in GB-treated loquat fruits. These results suggest that GB treatment may maintain the balance of active oxygen metabolism and reduce the lipid peroxidation and membrane damage,thereby reducing the chilling injury and extending the storage time of cold-stored loquat fruits.

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