ACTA AGRICULTURAE BOREALI-SINICA ›› 2011, Vol. 26 ›› Issue (4): 86-90. doi: 10.7668/hbnxb.2011.04.015

Special Issue: Cucumber

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Effect of Low Light Stress on Antioxidant Enzymes in Water-water Cycle of PS I of Two Ecotype Cucumber Seedlings

MI Guo-quan1, LIU Li-ying2, JIN Bao-yan3, ZHANG Zhen-xian2, REN Hua-zhong2   

  1. 1. Horticultural Institute, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;
    2. College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China;
    3. Integrated Agricultural Service Center of Xibeiwang Town, Beijing 100094, China
  • Received:2011-05-23 Published:2011-08-28

Abstract: Influences of low light on the activities of antioxidant enzymes in the electron transport of water-water cycle of PS I of two ecotypes of cucumber(Cucumis sativus L.cv.S1 and S404) seedling in artificial climatic chamber were studied.The trial aims to realize the physiology mechanism of low light response of cucumber seedlings.Results showed that,compared to the controlled condition,SOD,APX and DHAR activities in cucumber leaves were all increased during the early stage after low light treatment,but then decreased along with the treatment time delay.Increment of SOD,APX and DHAR activities in S1(tolerant to low light) leaves were larger than S404(sensitive to low light).Both MDHAR and GR activities were all decreased compared with controlled condition in S1 and S404.MDHAR activities in S1 leaves were higher than S404 under low light,while GR activities were reversed.These results suggested that low light-tolerant S1 were more potential to eliminate the active oxygen and free radicals with better low light adaptability by adjusting NADPH distribution in water-water cycle of PSI compare with low light-sensitive S404.

Key words: Cucumber, Low light, PS I, Antioxidant enzymes

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Cite this article

MI Guo-quan, LIU Li-ying, JIN Bao-yan, ZHANG Zhen-xian, REN Hua-zhong. Effect of Low Light Stress on Antioxidant Enzymes in Water-water Cycle of PS I of Two Ecotype Cucumber Seedlings[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2011, 26(4): 86-90. doi: 10.7668/hbnxb.2011.04.015.

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