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园艺学报 ›› 2005, Vol. 32 ›› Issue (4): 589-593.

• 研究论文 • 上一篇    下一篇

一氧化氮对草莓果实衰老的影响

朱树华1;周 杰1, 2;束怀瑞1   

  1. (1 山东农业大学园艺科学与工程学院, 泰安271018; 2 山东农业大学化学与材料科学学院, 泰安271018)
  • 收稿日期:2004-08-25 修回日期:2004-12-22 出版日期:2005-08-25 发布日期:2005-08-25

Effects of Nitric Oxide on Senescence of Strawberry

Zhu Shuhua1;Zhou Jie1, 2;Shu Huairui1   

  1. (1College of Horticulture, Shandong Agricultural University, Tai'an 271018, China; 2 College of Chemistry and Material Science, Shandong Agricultural University, Tai'an 271018, China)
  • Received:2004-08-25 Revised:2004-12-22 Online:2005-08-25 Published:2005-08-25

摘要: 以硝普钠( SNP) 为一氧化氮供体, 研究不同浓度的SNP对‘丰香’草莓果实软化过程相关酶活性的影响。结果表明, 5 μmol·L - 1 SNP可以显著增强果实CAT活性, 抑制PME、纤维素酶、PPO和LOX活性, 并推迟了PPO和LOX活性高峰的出现。但对exo-PG酶活性作用不明显。揭示了适宜浓度的一氧化氮通过改变果实软化酶的活性, 能够抑制果实衰老的规律, 证明了一氧化氮对果实衰老的影响具有双重生物效应。

关键词: 草莓, 一氧化氮, 贮藏, 软化,

Abstract: Using sodium nitrop russide as a nitric oxide (NO) donor, the effect of different concentration of SNP treatment on the activities of the softening enzymes of the post-harvest strawberry (‘Fengxiang’) was investigated. The results showed that in the fruits treated by 5μmol·L - 1 SNP aqueous solution, the activity of CAT could be obviously increased and those of PME, cellulase PPO and LOX could be significantly inhibited. However, exo-PG activity was hardly changed. This further opened out the mechanism that p roper concentration of NO could inhibit senescence of fruits by the way of effecting the activities of softening enzymes and p roved NO took on dual biological effects on senescence of fruits.

Key words: Strawberry, Nitric oxide, Storage, Softening, Enzyme

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