| 生物土壤与生态 |
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| Effects of Exogenous Ca2+ on Resistance to Rapid Cold and Freeze of Tebet Lamiophlomis rotate (Benth.) Kudo Seedlings |
CAI Zi-ping1, CHEN Yuan1*, GUO Feng-xia2,3, LI Xin-rong3, WANG Hong-xia1,
WANG San-xi4, LI Yao-ming4, ZHU Jun4 |
| 1.College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; 2.College of Life Sciences and Technology, Gansu Agricultural University, Lanzhou 730070, China; 3.Laboratory of Extreme Environmental Biology Adversity Tolerance and Biotechnology, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;4.Gannanzhou Institute of Agricultural Sciences, Gannanzhou 747000, Gansu, China |
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Abstract The seedlings of Tebet Lamiophlomis rotate (Benth.) Kudo at two-pair-leaf age were sprayed with different concentrations of CaCl2, and then were rapidly exposed to different low temperatures (4 ℃, 0 ℃ and -4 ℃) for 48 hours. Simultaneously, the treatment in 28 ℃ was taken as the Check. 48 hours later, the seedlings relative conductivity, chlorophyll content, MDA content, SOD and POD activities in the leaves were measured so as to explore the effect of exogenous Ca2+ on their resistance to rapid cold and freeze and provide a theoretical basis for their artificially domestic cultivation. The result indicated that the seedlings are well adapted to low temperatures at and above 0 ℃. The CaCl2 in concentration of 15 mmol\5L-1 can significantly motivate antioxidant enzymes such as SOD and POD activities, which consequently mitigate the membrane lipid peroxidation and enhance the stability of the membrane systems. All these effectually enhance the cold resistance of Tebet L. rotate, reduce the injury caused by rapid cold and freeze, and keep higher chlorophyll content in leaves to lay a good foundation for regrowth under good environmental condition.
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Received: 11 October 2008
Published: 07 September 2009
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Cite this article:
CAI Zi-ping;CHEN Yuan*;GUO Feng-xia;LI Xin-rong;WANG Hong-xia;WANG San-xi;LI Yao-ming;ZHU Jun. Effects of Exogenous Ca2+ on Resistance to Rapid Cold and Freeze of Tebet Lamiophlomis rotate (Benth.) Kudo Seedlings. JOURNAL OF DESERT RESEARCH, 2009, 29(5): 928-932.
URL:
http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2009/V29/I5/928
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2009, Vol. 29 
