摘要
水分胁迫加速了蔗叶活性氧的产生并消弱其清除能力。经回归模拟显示,蔗叶MDA含量、质膜差别透性、O_2产生速率和组织自动氧化速率均随土壤含水量的降低呈指数增加,SOD活性和GSH含量呈抛物线变化,而CAT活性呈对数降低;逐步回归分析定量地指出了水分胁迫下蔗叶SOD和CAT在清除活性氧、防止膜脂过氧化和质膜破坏中的协同作用关系,且受O_2产生的影响;经卡方测验证实,该回归模型各参数与大田干旱胁迫的实际结果相符。
The production of active oxygen in the leaves of sugarcane was accelerated and their scavengering ability weakened when they were subjected to soil water stress. Simulated regression analysis showed that the exponential increase of MDA content, plasmamembrane permeability, auto-oxidation rate of the organ and O2 produc-tion rate and parabolic decrease of SOD activity and GSH content as well as the logarithmic decrease of CAT activity in the stressed leaves were found with the decrease of soil water content. However, stepwise regression analysis indicated that MDA content was closely related to the activities of SOD and CAT as well as theO2 production rate under water stress, and the chi-square test revealed that the estimated parameters compared well with the practical results as tested in water deficit fields under natural conditions.
出处
《作物学报》
CAS
CSCD
北大核心
1996年第6期729-735,共7页
Acta Agronomica Sinica
基金
国家"八.五"科技攻关"85-03-05-02"专题
福建省教委的联合资助
关键词
甘蔗
活性氧
水分胁迫
数学分析
Sugarcane
Active oxygen
Water stress
Mathematical analysis
