【作者】 季作梁； 戴宏芬； 张昭其；

【Author】 Ji Zuoliang Dai Hongfen Zhang Zhaoqi(Dept. of Hort.,South- China Agri.Univ. , Guangzhou 510642)(Pomology Research Institutes of Guangdong Academy of Agricultural Science, 510640)

【机构】 华南农业大学； 广东省农科院果树研究所；

【摘要】 紫花芒果(Mangifera indica L.ZhiHua)果实2℃贮藏15d时完全冷害,贮藏前期,还原型谷胱甘肽(GSH)、还原型维生素C(AsA)含量略有上升,说明短期低温逆境胁迫可促使机体提高清除氧自由基能力,以适应不良环境.随冷害时间延长,GSH、AsA含量下降;膜脂过氧化产物(MDA)、膜透性、氧化型谷胱甘肽(GSSG)和氧化型维生素C(DHA)增加,表明细胞防御能力下降,自由基代谢平衡可能被打破,膜脂过氧化加剧,果实冷害加重.10℃贮藏芒果,无冷害症状,22d时果实启动成熟,贮藏期中,GSH、AsA含量维持较高水平.更多还原

【Abstract】 The contents of two endogenous free radicals scavengers, ascorbic acid (AsA) , glutathione (GSH) and their oxidative types were studied in. Mango (Mangifera indica L. ZhiHua) fruits stored under 2 ±0.5℃ and. 10 ±0.5℃ . Mango of 2 ±0.5℃ storage were suffered the severe chilling injury on the 15th day, while those of 10 ± 0.5℃ storage didn’ t at all. In the early stage of 2 ±0.5℃ storage, the levels of CSH and AsA got a little high-er. It implies that a physiological adjustment for increasing the scavenging ability to free rad-icals was induced by short term chilling stress. With the storage under 2 ±0.5℃ prolonged, the levels of GSH and AsA were decreased associated with the increase of GSSR, DHA con-tents and membrane permeability indicating that the balance of free radicals metabolism might by impaired. The levels of endogenous free radical scavengers in mangoes of 10 ±0. 5℃ storage were maintained higher.更多还原