黄连木根系抗氧化酶系对干旱胁迫的响应

Responses of Anti-oxidative Enzymes in Pistacia chinensis Roots to Drought Stress

采用划分水分梯度的控水方法,研究黄连木根系抗氧化酶系对干旱胁迫的响应。结果表明:干旱胁迫使黄连木根系中O2.-产生速率升高、MDA含量增加,使根系中SOD、POD、CAT、APX活性升高。O2.-产生速率、MDA含量与SOD、POD、CAT、APX活性的变化具有同步性,表明黄连木根系的抗氧化酶系具有清除活性氧的潜在能力,表现出一定的抗旱能力。

By the specific method from Hsiao （1973） a drought simulating test was conducted to study the responses of Anti-oxidative enzymes in one-year-old Pistacia chinensis seedling roots to drought stress in this paper. The results showed that under drought stress conditions, the superoxide anion （02＂-） generating rate and malondialdehyde （MDA） content in the Pistacia chinensis seedling roots were increased, which made the activity of superoxide dismutase （SOD）, peroxidase （POD）, catalase （CAT） and ascorbate peroxidase （APX） enhance. The Synchronous increases of 02＂-generating rate and MDA content with the activity of SOD, POD, CAT and APX under drought stresses indicated that anti-oxidative enzymes of Pistacia chinensis roots had the potential capacity on the scavenging activated oxygen and being of drought tolerance.