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园艺学报 ›› 2006, Vol. 33 ›› Issue (2): 289-293.

• 研究论文 • 上一篇    下一篇

外源茉莉酸甲酯对黄瓜采后冷害及生理生化的影响

韩 晋1, 2;田世平1*
  

  1. (1 中国科学院植物研究所, 北京100093; 2 中国科学院研究生院, 北京100039)
  • 收稿日期:2005-04-25 修回日期:2005-06-17 出版日期:2006-04-25 发布日期:2006-04-25

Effects of Exogenous Methyl Ja smona te on Chilling Injury and Physiologyand Biochem istry in Postharvest Cucumber

Han J in1, 2 and Tian Ship ing13
  

  1. (1 Institute of B otany, Chinese Academ y of Sciences, B eijing 100093, China; 2Graduate School, Chinese Academ y of Sciences,B eijing 100039, China)
  • Received:2005-04-25 Revised:2005-06-17 Online:2006-04-25 Published:2006-04-25

摘要: 以对低温敏感的黄瓜‘神农5号’果实为材料, 研究了外源茉莉酸甲酯处理后的果实有关抗冷性的生理生化指标的变化。结果表明, 该处理减缓了黄瓜果实冷害症状的发展, 降低了细胞膜电解质渗出率、脯氨酸和可溶性固形物含量。处理后, 黄瓜组织中过氧化氢酶的活性升高, 过氧化物酶活性降低,超氧化物歧化酶活性没有显著变化。此外, 不同浓度的茉莉酸甲酯对黄瓜叶绿素含量的影响不同。因此,茉莉酸甲酯可能通过代谢途径的改变来降低黄瓜冷害。

关键词: 黄瓜, 茉莉酸甲酯, 果实, 冷害, 抗氧化酶, 叶绿素含量

Abstract: The effects of exogenous methyl jasmonate (MJ) on physiological and biochemical attributes of cucumber (Cucumis sativus L. ‘Shennong 5’) under low temperature stress were investigated in this paper. The results indicated that symp toms of chilling injury in the cucumber treated withMJ developed slowly, electrolyte leakage of cellmembrane, p roline content and soluble solids content decreased after the treatment. MJ treatment could increase catalase activity, decrease peroxidase activity, but it could not affect significantly superoxide dismutase activity. Additionally, the concentration of MJ significantly affected chlorophyll content in cucumber. Therefore, the effect ofMJ on enhancing resistance of cucumber fruits to chilling stressmay attribute to altering its physiological pathways.

Key words: Cucumber, Methyl jasmonate, Fruit, Chilling injury, Antioxidant enzymes, Chlorophyll content