干旱胁迫对小叶黄杨幼苗膜脂过氧化及保护酶活性的影响  

Effects of Drought Stress on Lipid Peroxidation and Activity of Defense Enzyme of Buxus Microphylla Seedings

作　　者：张旭颖[1] 王玲玲[1] 关旸[1] 徐娜[1] 

机构地区：[1]哈尔滨师范大学

出　　处：《哈尔滨师范大学自然科学学报》2010年第2期79-83,共5页Natural Science Journal of Harbin Normal University

基　　金：黑龙江省教育厅科学技术研究资助项目(10541083;10551104);哈尔滨师范大学博士科研启动项目

摘　　要：以小叶黄杨幼苗为实验材料,通过人为控制土壤含水量模拟自然干旱条件,研究了干旱胁迫对小叶黄杨(Buxus microphylla)质膜相对透性、MDA含量和过氧化氢含量、超氧阴离子产生速率及保护酶活性的影响.结果表明:在干旱胁迫下,小叶黄杨质膜相对透性、超氧阴离子产生速率、MDA及过氧化氢含量总体呈上升趋势,但幅度各异;随着胁迫程度的加剧,SOD、CAT活性呈现出先升后降的变化趋势,POD、APX活性总体呈现上升趋势.Lipid peroxidation,MDA content,H2O2 content,O·2 production rate,activities of defense enzymes in Buxus microphylla seedlings were studied during drought stress.During drought stress,the cytomembrane permeability,MDA content,H2O2 content,O·2 production rate increased.the activities of SOD as well as CAT showed the trend of increasing-reducing with increasing levels of drought stress,however the activities of POD as well as APX showed consistent increases.

关 键 词：干旱胁迫 小叶黄杨 膜脂过氧化 保护酶活性 

分 类 号：S688[农业科学—观赏园艺]