干旱胁迫下两种岩石边坡修复植物的抗旱性  

The Drought Resistance of Two Rocky Slope Ecological Restoration Plants Under Drought Stress Condition

作　　者：周江 胡佳佳 裴宗平[3] 涂永成[3] 孔静[3] 

机构地区：[1]贵阳市生态环境科学研究院,贵州贵阳550002 [2]贵州省环境监测中心站,贵州贵阳550001 [3]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《北方园艺》2014年第24期70-73,共4页Northern Horticulture

摘　　要：以岩石边坡常用修复植物火棘和紫穗槐为试材,采用盆栽控水法对其进行干旱胁迫试验,分析干旱胁迫对植物形态和生理的影响。结果表明:在形态特征上,干旱胁迫会使植物发生叶片黄化,植株萎蔫等现象;在生理特征上,随着胁迫时间的增加,火棘、紫穗槐的叶片相对含水量(RWC)、叶绿素含量均呈现不同的下降趋势,相对水分亏缺(RWD)、电导率、丙二醛(MDA)含量、脯氨酸含量和可溶性糖含量均呈现不同程度的上升趋势;干旱胁迫结束时,火棘各生理指标的变化幅度依次为-26.7%、-53.28%、+22.7%、+22.9%,+13.2%、+352.7%和+1.0%;紫穗槐各生理指标的变化幅度依次为-44.3%、-54.8%,+25.3%、+123.6%,+2 327.5%和399.4%。即干旱胁迫对火棘的影响小于紫穗槐,说明火棘的抗旱性高于紫穗槐,在岩石边坡修复植物选择上应引起重视。Taking Pyracantha fortuneana and Amorpha fruticosa L.that are common in the ecological restoration of rocky slopes as the materials,the changes of morphology and physiology under drought stress with pot culture experiments were researched.The results showed that drought stress would make the plant leaf yellowing and wilting on the morphological characteristics under the drought stress,the relative water content and chlorophyll content in leaves of Pyracantha fortuneana,Amorpha fruticosa L.were declined in different degree,the relative water content,relative conductivities,malondialdehyde（MDA）content,proline content and soluble sugar content showed a rising trend in different degree;at the end of drought stress,the amplitude of variation of the above physiological indexes of Pyracantha fortuneana were-26.7%,-53.28%,＋13.2%,22.7%,＋22.9%,＋352.7% and ＋1.0%,and these indexes of Amorpha fruticosa L.were-44.3%、-54.8%,＋25.3%、＋123.6%,＋2 327.5%and 399.4%.It said that the effect of drought stress on Pyracantha fortuneana was less than Amorphafruticosa L.＇s,which illustrated Pyracantha fortuneana was more resistant to drought stress than Amorpha fruticosa L.,and it should cause more attention in rock slope repair plant selection.

关 键 词：干旱胁迫 岩石边坡 火棘 紫穗槐 抗旱性 

分 类 号：X171.4[环境科学与工程—环境科学]