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不同浓度氧贮藏荔枝的几种酶活性变化
孙谷畴; 林植芳; 林桂珠; 陈芳; 刘淑娴;   
1.中国科学院华南植物研究所;2.中国科学院华南植物研究所 广州 510650;3.广州 510650
摘要:
在空气和高浓度氧下贮藏荔枝1至2天,果皮和果肉脂氧合酶活性增高;而在低浓度氧下则无此酶活增高。3天后酶活降低,5天后果实酶活很低。三种浓度氧下3天,果皮过氧化物酶活增至最大值,随后则略有降低。在高浓度氧和空气下,果皮多酚氧化酶活性增高,酶活性较低浓度氧的高。在高浓度氧下,黄嘌呤氧化酶活性鞍空气和低浓度氧下的高。几种酶活性增高,可能导致氧化和过氧化作用加剧和引起果皮褐变。
关键词:  荔枝  酶活性  氧浓度  
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