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。
In this study Longdong（ strong drought-resistance） Gongnong No 1 （ medium drought-resistance）and BL-02- 329（ weak drought-resistance）were chosen as experimental material to study the change of water metabolism and two osmotic 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 drought-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 drought-resistant of alfalfa cuhivars.
出处
《华北农学报》
CSCD
北大核心
2008年第4期140-144,共5页
Acta Agriculturae Boreali-Sinica
基金
教育部博士点基金项目(20060022011)
中国博士后科学基金(20070410836)
