激光对油松在干旱胁迫下萌发及酶活性的影响  

Effect of laser on germination and enzyme activity of Chinese pine seeds under drought stress

作　　者：吴俊林[1] 张社奇[2] 孙润广[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,西安710062 [2]西北农林科技大学生命科学学院,杨凌712100

出　　处：《应用激光》2005年第6期408-410,420,共4页Applied Laser

基　　金：国家自然科学基金(20272035);陕西省自然科学基金(2002A04)资助项目

摘　　要：在干旱胁迫条件下,对激光辐照的油松种子进行了萌发试验,并对其幼苗进行了超氧化物歧化酶(SOD)、过氧化物酶(POD)的活性和丙二醛(MDA)含量的测定。结果表明:激光辐照油松种子在干旱胁迫条件下的发芽率、根长、活力指数、生物量等显著提高,萌发期油松幼苗保护酶系统的超氧化物歧化酶和过氧化物酶活性明显提高,膜脂的过氧化物丙二醛含量下降,减少了膜脂过氧化作用对膜的伤害。从而说明,激光辐照油松种子在干旱胁迫条件下萌发及幼苗生长的抗旱性效应明显增强。The germination experiment of Chinese pine seeds processed by laser was carried out under drought stress. The activity of superoxide dismatase （SOD）, peroxidase（POD） and the content of malondialdehyde（MDA） were determined. The result showed： The germination percentage ,root length ,vitality index and fresh weight were notably increased. The SOD and POD activity of Chinese pine seedings＇ Protective Enzyme System were obviously raised. The content of malondialdehyde （MDA） was decreascd, which reduced the damage to the membance. So ,the germination and seedings＇ drought resistance of Chinese pine seeds processed by laser were enhanced under drought stress.

关 键 词：激光辐照 干旱胁迫 油松种子 酶活性 

分 类 号：S792.39[农业科学—林木遗传育种] Q945[农业科学—林学]