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冷害过程芒果果实中谷胱甘肽和抗坏血酸含量的变化

Changes of Ascorbic Acid and Glutatione Con- tents during Mango’ s Chilling Injury

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【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.

【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.

【基金】 国家及广东省自然科学基金资助项目(930411)
  • 【会议录名称】 中国园艺学会成立70周年纪念优秀论文选编
  • 【会议名称】中国园艺学会成立70周年纪念暨学术讨论会
  • 【会议时间】1999
  • 【分类号】S667.7
  • 【主办单位】中国园艺学会
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