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https://www.ahs.ac.cn/images/0513-353X/images/top-banner6.jpg|#|黄瓜
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园艺学报 ›› 2001, Vol. 28 ›› Issue (5): 430-434.

• 研究论文 • 上一篇    下一篇

不同光照条件下缺镁对黄瓜生长及活性氧清除系统的影响

杨广东1, 2;朱祝军1   

  1. ( 1 浙江大学园艺系, 杭州310029; 􀀁2􀀁山西省农业科学院棉花研究所, 运城044000)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2001-10-25 发布日期:2001-10-25

Effects of Magnesium Deficiency on Growth and Active Oxygen Scav􀀁enging System in Cucumber under Different Light Intensities

Yang Guangdong1, 2 and Zhu Zhujun1   

  1. (1Department of Horticulture, Zhej iang University , Hangzhou 310029; 􀀁2Cotton Research Institute, Shanxi Academy of Agricultural Sciences , Yuncheng 044000)
  • Received:1900-01-01 Revised:1900-01-01 Online:2001-10-25 Published:2001-10-25

摘要: 探讨了不同光照条件下缺镁对黄瓜生长及活性氧清除系统的影响。结果表明,强光下缺镁明显抑制黄瓜植株的生长, 叶片中超氧自由基( O-2 ) 产生速率、H2O2 和丙二醛(MDA) 含量明显增加, 超氧化物歧化酶( SOD) 、抗坏血酸过氧化物酶( AsA􀀁POD) 、抗坏血酸还原酶( DR) 和谷胱甘肽还原酶( GR) 的活性明显上升; 而弱光下缺镁则对植株生长影响较小, 叶片中O-2 产生速率、H2O2 和MDA 含量以及SOD、AsA􀀁POD、DR、GR 的活性无明显变
化, 过氧化氢酶( CAT) 的活性在各处理间均无显著差异。强光下缺镁对植株的伤害较大, 可
能与活性氧的增加有关。

关键词: 黄瓜, 缺镁, 光照强度, 活性氧, H2O2 清除酶系统

Abstract: The effects of magnesium deficiency on the growth and active oxygen scavenging system under different light intensities were studied in cucumber. The results showed that magnesium deficiency under high light intensity inhibited plant growth, however, magnesium deficiency did hardly affect plant growth under low light intensity. O-2 producing rate, H2O2 and MDA contents, and the activit ies of superoxide dismutase, ascorbate peroxidase, dehydroascorbate reductase, glutathione reductase in the leaves were considerably increased by magnesium deficiency under high light intensity, but were not significantly affected under low light intensity. There were no significant differences of catalase activity among all treatments.

Key words: Cucumber, Def iciency, Magnesium, Light intensity, Active oxygen, H2O2􀀁, scavenging enzymes

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