毛白杨叶片保护酶活性等对干旱胁迫的响应  

Response of Activity of Cell Defense Enzymes in Seedlings Leaves of Populus tomentosa to Drought Stress

作　　者：方晓娟 李吉跃[2] 

机构地区：[1]山西省灵石县林业局,山西灵石031300 [2]华南农业大学林学院

出　　处：《广东林业科技》2011年第6期16-20,共5页Forestry Science and Technology of Guangdong Province

基　　金："十一五"国家科技支撑计划课题(2006BAD24B04)

摘　　要：通过盆栽控水试验研究了不同水分胁迫条件下毛白杨(Populus tomentosa)8个1(2)-0型无性系苗木叶片中膜脂过氧化产物丙二醛(MDA)含量、超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性的动态变化过程。结果表明,随干旱胁迫强度的增大,毛白杨无性系叶片的MDA含量、CAT活性呈递增趋势;POD、SOD的活性在轻度干旱时显著增加,随后下降,但始终高于无胁迫时的酶活性。Response of the leaves of eight 1 （2）-0 type Populus tomentosa clones to drought stress were studied by water controlling experiment. Relative indices, including the content of malondialdehyde （MDA） , the activities of peroxidase （ POD）, superoxide dismutase （SOD） and catalase （ CAT）, were measured. The results showed that with increasing intensity of drought stress, the contents of MDA and CAT activity in seedlings leaves were increasing. The activities of POD and SOD significantly increased first and then decreased, which were higher than that without drought stress.

关 键 词：毛白杨 干旱胁迫 丙二醛 保护酶 

分 类 号：S792.117[农业科学—林木遗传育种]