Physiological Response of Three Kinds of Slope Protection and Disaster Reduction Plants to Different Water Potentials
Amorpha fruticosa,Lespedeza bicolor and Hippophae rhamnoides are excellent plants with stronger slope disaster resistance in the North,which can effectively prevent the occurrence of the slope failure through three-dimensional reinforced effect.We tested the adaptive range and physiological mechanism of three plants to water-stress in quantitative.The contents of soluble sugar,flee proline and malonaldehyde (MDA) of leaves were tested under different water potentials designed for 5 treatments,including 0-0.02Mpa,-0.02-0.04 Mpa,-0.04-0.06 Mpa,-0.06-0.08 Mpa and<-0.08 Mpa.Three kinds of plants had the best growth under-0.04-0.06 Mpa,especially for Amorphafruticosa,Amorphafruticosa had better water wet resistance than the other two plants and did not show any damaged symptoms under 0-0.02Mpa for 2 months later.When the water potential was below-0.06 Mpa,the growth of Amorpha fruticosa and Lespedeza bicolor was restricted,but Hippophae rhamnoides still grew well below-0.08Mpa.The results of the contents determination of soluble sugar,free proline and malonaldehyde (MDA) showed that the drought had influence on three plants in different degree.A compensatory inerease appeared in contents of soluble sugar and free proline for Hippophae rhamnoides under drought stress,and the malondialdehyde content of Amorpha fruticosa and Lespedeza bicolor increased significantly in low water potential.
soil water potential soluble sugar free proline malonaldehyde
WANG Jinghong LI Xingtao LIU Xiaodong XUE Fei WANG Guangli
The College of Landscape, Northeast Forestry University, Harbin 150040 College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China
国际会议
合肥
英文
778-782
2012-05-24（万方平台首次上网日期，不代表论文的发表时间）