摘要
采用大田持续水分胁迫处理,探讨干旱对野生豆科牧草生长发育和抗旱生理机制的影响.结果表明,干旱胁迫条件下3种野生豆科牧草株高均显著降低,地上和地下生物量较对照显著下降(P<0.05);白花草木樨在干旱胁迫下根冠比显著高于对照(P<0.05);黄花苜蓿和沙打旺叶片中可溶性糖、游离脯氨酸显著上升(P<0.05);白花草木樨叶片中游离脯氨酸含量无显著性变化,可溶性糖含量上升;SOD和POD两种保护酶活性均较对照增强,且达到显著水平(P<0.05).
The effects of drought on growth development and physiological mechanism of drought resistance of 3 wild leguminous forages,Melilotusalbus,Astragalusadsurgens and Lespedeza hedysaroides were determined. Under the conditions of drought stress,the plant heights significantly decreased,and the aboveand below ground yields decreased significantly compared with the controls（P0.05）; under drought stress,the root shoot ratio of Melilotusalbus was significantly higher than that of the control（P0.05）; there was a significant increase in soluble sugar and free proline in the leaves of Astragalusadsurgens and Lespedeza hedysaroides（P0.05）; there was no significant change in the leaf proline content in Melilotusalbus,but soluble sugar content increased significantly. The activities of SOD and POD,two protective enzymes,were significantly enhanced.
作者
苏日古嘎
张玉霞
朱爱民
Suriguga;ZHANG Yu-xia;ZHU Ai-min(College of Agriculture, Inner Mongolia University for Nationalities, Tongliao 028043 ,Chin)
出处
《内蒙古民族大学学报（自然科学版）》
2017年第5期424-428,441,共6页
Journal of Inner Mongolia Minzu University：Natural Sciences
基金
国家行业公益项目(201403048-2)
内蒙古自然科学基金项目(2014MS0315)
关键词
干旱胁迫
豆科牧草
生长发育
抗旱生理机制
Drought stress
Leguminous forage
Growth development
Physiological mechanism of drought resistance
