温度对白菜采后乙烯释放和活性氧代谢的影响  

Effect of temperature on ethylene production and active oxygen metabolism of Chinese cabbage after harvest

作　　者：余挺[1] 席屿芳 

机构地区：[1]浙江农业大学食品科学与技术系

出　　处：《浙江农业学报》1997年第6期290-294,共5页Acta Agriculturae Zhejiangensis

摘　　要：白菜采后在２０±１℃条件下乙烯释放量呈峰型变化，Ｏ－２产生速率迅速大幅度上升，而ＳＯＤ、ＣＡＴ活性快速下降，使膜脂过氧化产物ＭＤＡ含量和膜透性提高；在１０±１℃和５±１℃条件下，乙烯释放量持续下降，活性氧代谢保持相对平衡，ＭＤＡ含量和膜透性被控制在较低水平上。结果表明，活性氧代谢失调是导致白菜采后叶片衰老的重要因素。The changes in ethylene production and active oxygen metabolism of Chinese cabbage (Brassica campestris spp. Chinensis (L) Makino) after harvest at 20±1℃, 10±1℃ and 5±1℃ were studied. It was found that at 20±1℃, the ethylene production showed a climacteric-like pattern, and the activities of both SOD and CAT were rapidly dereased, while the rate of superoxide radical production, the content of MDA and membrane permeability were continuously increased. But at the lower temperature (10±1℃ and 5±1℃), no climacteric rise in ethylene production was found. However higher activity of both SOD and CAT was maintained. Lower O-2 production rate, MDA content and permeability of membrane were obtained. The results indicated that the unbalance of active oxygen metabolism could be considered the important factor which triggered the leaves senescence of Chinese cabbage after harvest.

关 键 词：白菜 乙烯 温度 活性氧代谢 

分 类 号：S634.101[农业科学—蔬菜学]