作　　者： ; ; ; ; ;

机构地区： 广西药用植物园

出　　处： 《北方园艺》 2012年第10期181-183,共3页

摘　　要： 以广豆根幼苗为试材,采用不同质量浓度PEG-6000模拟土壤干旱胁迫处理广豆根(Sophora tonkinensis Gagnep.)幼苗60d后,测定叶中超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)活性及丙二醛(MDA)含量,探讨山豆根对干旱胁迫的适应机理,观测广豆根在干旱胁迫下的生理响应。结果表明:经不同质量浓度PEG-6000胁迫后,广豆根MDA的含量显著提高,几种保护酶活性在不同浓度干旱胁迫后都有不同程度的变化,但都显著或极显著高于正常水分处理;在15%处理下CAT活性显著高于其它处理;随着PEG浓度的增加,SOD活性表现出一直上升的趋势。 Sophora tonkinensis Gagnep.seedling was chosen as test material,the protective enzymes activity include super oxide dismasts（SOD）,catalase（CAT）,peroxidase（POD） and malondialde-hyde（MDA） content in leaves were measured when the S.tonkinensis Gagnep.had lived in different concentration of polyethylene glycol（PEG-6000） treatment soil for 60 days,the physiological responses under drought stress and find out the plant drought adaptation of Sophora tonkinensis Gagnep.were studied.The results showed that the MDA content increased and the activity of the protective enzymes had different changes but were notably higher than the normal treatment under different concentration of PEG-6000.The activity of CAT was notably higher under the 15% treatment.The activity of SOD was increased with the increasing concentration of PEG.

关 键 词： 广豆根 干旱胁迫 生理响应

领　　域： [农业科学] [农业科学]