Journal of Integrative Agriculture ›› 2013, Vol. 12 ›› Issue (8): 1450-1460.DOI: 10.1016/S2095-3119(13)60549-3

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Low Root Zone Temperature Limits Nutrient Effects on Cucumber Seedling Growth and Induces Adversity Physiological Response

 YAN Qiu-yan, DUAN Zeng-qiang, MAO Jing-dong, LI Xun , DONG Fei   

  1. 1.State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese cademy of Sciences, Nanjing 210008, P.R.China
    2.Department of Chemistry and Biochemistry, Old Dominion University, VA 23529, USA
    3 Agricultural Bureau of Xiangfen County, Shanxi Province, Xiangfen 041500, P.R.China
  • 收稿日期:2012-09-18 出版日期:2013-08-01 发布日期:2013-09-12
  • 通讯作者: Correspondence DUAN Zeng-qiang, Tel: +86-25-86881562, Fax: +86-25-86881000, E-mail: zqduan@issas.ac.cn
  • 基金资助:

    This work was supported by the National Natural Science Foundation of China (41101272) and the Open Fund of the State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences (0812201217).

Low Root Zone Temperature Limits Nutrient Effects on Cucumber Seedling Growth and Induces Adversity Physiological Response

 YAN Qiu-yan, DUAN Zeng-qiang, MAO Jing-dong, LI Xun , DONG Fei   

  1. 1.State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese cademy of Sciences, Nanjing 210008, P.R.China
    2.Department of Chemistry and Biochemistry, Old Dominion University, VA 23529, USA
    3 Agricultural Bureau of Xiangfen County, Shanxi Province, Xiangfen 041500, P.R.China
  • Received:2012-09-18 Online:2013-08-01 Published:2013-09-12
  • Contact: Correspondence DUAN Zeng-qiang, Tel: +86-25-86881562, Fax: +86-25-86881000, E-mail: zqduan@issas.ac.cn
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (41101272) and the Open Fund of the State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences (0812201217).

摘要: Effects of root-zone temperatures (RZT) (12°C-RZT and 20°C-RZT) and different N, P, and K nutrient regimes on the growth, reactive oxygen species (ROS), and antioxidant enzyme in cucumber seedlings were investigated in hydroponics. Strong interactions were observed between RZT and nutrient on the dry weight (P=0.001), root length (P=0.001) and leaf area (P=0.05). Plant dry weights were suppressed at low RZT of 12°C, while higher biomass and growth of cucumber seedlings were produced at elevated RZT of 20°C under each nutrient treatment. Growth indexes (plant height, internode length, root length, and leaf area) at 12°C-RZT had less difference among nutrient treatments, but greater response was obtained for different nutrients at high RZT. RZT had larger effects (P=0.001) on cucumber seedling growth than nutrients. In addition, N was more effective nutrients to plant growth than P and K under low root temperature to plant growth. Higher hydrogen peroxide (H2O2), malondialdehyde (MDA), soluble sugar (SS) contents in leaves were observed at 12°C-RZT in all nutrient treatments than those at 20°C-RZT, indicating the chilling adversity damaged to plant growth. In general, antioxidant enzyme had larger response under low root-zone temperature. Superoxide dismutase (SOD) activities were higher in both leaves and roots while peroxidase (POD) and catalase (CAT) showed large different action in leaves and roots at both the two root-zone temperature.

关键词: Cucumis sativus L. , growth indexes , antioxidant enzyme , reactive oxygen

Abstract: Effects of root-zone temperatures (RZT) (12°C-RZT and 20°C-RZT) and different N, P, and K nutrient regimes on the growth, reactive oxygen species (ROS), and antioxidant enzyme in cucumber seedlings were investigated in hydroponics. Strong interactions were observed between RZT and nutrient on the dry weight (P=0.001), root length (P=0.001) and leaf area (P=0.05). Plant dry weights were suppressed at low RZT of 12°C, while higher biomass and growth of cucumber seedlings were produced at elevated RZT of 20°C under each nutrient treatment. Growth indexes (plant height, internode length, root length, and leaf area) at 12°C-RZT had less difference among nutrient treatments, but greater response was obtained for different nutrients at high RZT. RZT had larger effects (P=0.001) on cucumber seedling growth than nutrients. In addition, N was more effective nutrients to plant growth than P and K under low root temperature to plant growth. Higher hydrogen peroxide (H2O2), malondialdehyde (MDA), soluble sugar (SS) contents in leaves were observed at 12°C-RZT in all nutrient treatments than those at 20°C-RZT, indicating the chilling adversity damaged to plant growth. In general, antioxidant enzyme had larger response under low root-zone temperature. Superoxide dismutase (SOD) activities were higher in both leaves and roots while peroxidase (POD) and catalase (CAT) showed large different action in leaves and roots at both the two root-zone temperature.

Key words: Cucumis sativus L. , growth indexes , antioxidant enzyme , reactive oxygen