盐旱交叉胁迫对皂角幼苗保护酶活性的影响  

Effects of Salt and Drought Intercross Stresses on Activity of Cell Defense Enzymes in Leaves of Gleditsia sinensis Lam.Seedlings

作　　者：于振群[1] 孙明高[1] 魏海霞[2] 孔艳菊[1] 孔红岭[1] 

机构地区：[1]山东农业大学林学院,山东泰安271018 [2]中国科学院青藏研究所,北京100085

出　　处：《中南林业科技大学学报》2007年第3期29-32,48,共5页Journal of Central South University of Forestry & Technology

基　　金：国家科技攻关计划重大专项(2002BA516A15-04);山东农业良种产业化开发工程项目(2001500)

摘　　要：以一年生皂角Gleditsia sinensis Lam.实生苗为材料,研究干旱和盐分交叉胁迫对其膜质过氧化和保护酶活性的影响.结果表明:盐旱交叉胁迫下,丙二醛(MDA)含量、膜透性呈上升趋势,超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性先上升后下降;在相同的处理下,随着处理时间的延长,膜透性和MDA含量呈上升趋势,SOD、POD活性均下降,CAT活性先上升后下降.分析认为皂角幼苗在盐旱交叉胁迫下表现出交叉适应性,适度的干旱胁迫可增加皂角的抗盐能力.Lipid peroxidation and activity of cell defense enzymes in leaves of one-year-old Gleditsia sinensis Lam. seedlings were studied under drought and salt stresses. The results show that under drought and salt stresses, the content of MDA and electrolyte leakage took on an increasing trend; that the activities of SOD, POD, CAT increased at first and then decreased; that with the prolonging of treatment, electrolyte leakage and content of MDA took on an increasing trend; and that the activities of SOD, POD decreased while the activities of CAT increased at first and then decreased. The comprehensive analysis indicates that under the intercross stresses of salt and drought, the seedlings of Gleditsia sinensis Lam. showed some tolerance to salt and drought and this further indicates that appropriate drought stress can increase the seedlings＇ resistance to salt stress.

关 键 词：植物生理 交叉胁迫 皂角幼苗 膜质过氧化膜 保护酶活性 

分 类 号：Q945.78[生物学—植物学]