华北农学报 ›› 2008, Vol. 23 ›› Issue (4): 140-144. doi: 10.7668/hbnxb.2008.04.032

所属专题: 抗旱节水

• 论文 • 上一篇    下一篇

干旱胁迫下紫花苜蓿叶片水分代谢与两种渗透调节物质的变化

韩瑞宏1, 田华2, 高桂娟3, 卢欣石4   

  1. 1. 华南农业大学 生命科学学院,广东 广州 510642;
    2. 华南农业大学 农学院,广东 广州 510642;
    3. 广东教育学院 生物系,广东 广州 510303;
    4. 北京林业大学 资环学院,北京 100083
  • 收稿日期:2008-02-20 出版日期:2008-08-28
  • 通讯作者: 卢欣石(1947-),男,甘肃兰州人,教授,博士,博士生导师,主要从事牧草抗逆性研究工作
  • 作者简介:韩瑞宏(1974-),女,内蒙古牙克石人,博士,主要从事牧草抗逆性研究工作
  • 基金资助:
    教育部博士点基金项目(20060022011);中国博士后科学基金(20070410836)

Change of Water Metabolism and Two Osmotic Adjustment Substances in the Leaves of Alfalfa under Drought Stress

HAN Rui-hong1, TIAN Hua2, GAO Gui-juan3, LU Xin-shi4   

  1. 1. College of Life Science,South China Agricultural University,Guangzhou 510642,China;
    2. College of Agronomy,South China Agricultural University,Guangzhou 510642,China;
    3. Department of Biology,Guangdong Education Institute,Guangzhou 510303,China;
    4. Institute of Resources and Environment,University of Forestry of Beijing,Beijing 100083,China
  • Received:2008-02-20 Published:2008-08-28

摘要: 以陇东(耐旱)、公农1号(耐旱性中等)、BL-02-329(不耐旱)3种抗旱性强弱差异较大的紫花苜蓿为试验材料,对干旱胁迫下其叶片水分代谢与两种渗透调节物质的变化进行研究,结果表明:干旱胁迫下苜蓿叶片水势、叶片相对含水量降低,水分饱和亏缺增加,总体上3种紫花苜蓿叶片抗旱性强的材料其叶片水势降低的幅度较大,水分饱和亏缺上升幅度及叶片相对含水量下降幅度较低。干旱胁迫下,可溶性糖及脯氨酸含量上升,2种渗透物质对3种紫花苜蓿均有渗透调节作用。脯氨酸是三种紫花苜蓿主要渗透调节物质,脯氨酸含量的多少及增加的幅度能反映苜蓿的耐旱性。

关键词: 干旱胁迫, 紫花苜蓿, 叶片, 水分代谢, 渗透调节

Abstract: In this study Longdong( strong drough- t resistance) Gongnong No 1( medium drough- t resistance) and BL -02 - 329( weak drough- t resistance) were chosen as experimental material to study the change of water metabolism and two os - motic adjustment substances in the leaves of alfalfa under drought stress.The results showed: the water potential and water relative content in the leaves of alfalfa decreased and water saturated deficit in the leaves of alfalfa increased under drought stress.There were higher decrease extent of water potential and lower decrease extent of water relative content in the leaves of strong drough- t resistance alfalfa under drought stress. At the same time the proline content and soluble sugar content increased in the leaves of three alfalfa, the two substances both have adjustive function to three alfalfa under drought stress. Proline is the main adjustment substance and the content and the increase extent can reveal drough- t resis - tant of alfalfa cultivars.

Key words: Drough stress, Alfalfa, Leaf, Water metabolism, Osmotic adjustment

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引用本文

韩瑞宏, 田华, 高桂娟, 卢欣石. 干旱胁迫下紫花苜蓿叶片水分代谢与两种渗透调节物质的变化[J]. 华北农学报, 2008, 23(4): 140-144. doi: 10.7668/hbnxb.2008.04.032.

HAN Rui-hong, TIAN Hua, GAO Gui-juan, LU Xin-shi. Change of Water Metabolism and Two Osmotic Adjustment Substances in the Leaves of Alfalfa under Drought Stress[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(4): 140-144. doi: 10.7668/hbnxb.2008.04.032.

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