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ACTA HORTICULTURAE SINICA ›› 2003, Vol. 30 ›› Issue (1): 15-18.

• 研究论文 • Previous Articles     Next Articles

Microsomal Membrane Ca2+-ATPase Activity and Lipid Peroxidation Levelduring Senescence of Postharvest Strawberry Fruit

Fan Xiucai1,2;Guan Junfeng1;Zhang Jishu2;Li Guangmin1   

  1. (1 Institute of Agro-Physics , Plant Physiology and Biochemistry , Hebei Academy of Agricultural and Forestry Sciences , Shijiazhuang 050051 , China ;2 Northwestern Science and Technology University of Agricultural and Forestry , Yangling 712100 , China)
  • Received:2002-04-25 Revised:2002-06-23 Online:2003-02-25 Published:2003-02-25

Abstract: Changes in activities of Ca2+-ATPase and SOD , O-·2 production rate and MDA content in microsomal membrane of strawberry fruit stored at normal temperature (25 ℃) and cold temperature (4 ℃) were investigated. The results showed that the activities of total microsomal membrane Ca2+-ATPase, plasmolemma Ca2+-ATPase , mitochondria-Ca2+-ATPase and tonoplast-Ca2+-ATPase , and of SOD , and O-·2 production rate all increased at first and then decreased , and MDA content changed in the contrary trend during senescence in fruit stored at 4 ℃. The changing trends in Ca2+-ATPase activities and O-·2 production rate of microsomal membrane in fruit stored at 25 ℃were consistent with the fruit stored at 4 ℃. However , a gradual decrease in SOD activity and increase in MDA content were found during room temperature storage. It is suggested that the fruit senescence was closely correlated with the damage of cytoplasmic Ca2+ homeostasis and the enhancement of membrane lipid
peroxidation in strawberry fruit

Key words: Strawberry, Fruit, Senescence, Microsomal membrane, Ca2+-ATPase, Lipid peroxidation

CLC Number: