摘要
为简便快速测定植物过氧化氢酶活性,探究过氧化氢酶活性随时间变化的关系,运用紫外分光光度法比较了4种反应体系中过氧化氢酶(CAT)催化H2O2分解的时间曲线。研究结果表明:CAT催化H2O2的分解反应仅在一定底物浓度范围内符合一级反应,因此计算出速率常数K,即代表CAT活性。直接以0.03%H2O2作为CAT反应液,配制简便,试剂廉价,而且得到的时间曲线效果最好,是CAT反应液的最佳选择。
In order to simply and rapidly measure catalase(CAT) activity in plant and explore the correlationbetween CAT activity and time variation,ultraviolet spectrophotometry was applied to compare the time courseof the decomposition of H2O2 catalyzed by CAT in four different reaction systems.The results showed that thedecomposed reaction of H2O2 catalyzed by CAT accorded with the first order reaction in a certain substrateconcentration.So the constant value of rate K could be represented the activity of CAT.Compared with otherreaction solutions,0.03% H2O2 had such advantages as simple preparation,low cost and could get the best timecourse in the measurement,so it was the optimum reaction solution of CAT activity measurement.
出处
《中国农学通报》
2016年第15期159-165,共7页
Chinese Agricultural Science Bulletin
基金
国家自然科学基金"新疆滴灌条件下高产(≥15000 kg/hm2)玉米需水规律及其调控研究"(31360276)
石河子大学高层人才项目"新疆高产(≥15000 kg/hm2)玉米需水规律及灌溉技术研究"(RCZX201217)
关键词
过氧化氢酶
紫外分光光度法
速率常数
时间曲线
反应液
catalase
ultraviolet spectrophotometry
the rate constant
time course
reaction solution
作者简介
第一作者简介:王群,男,1993年出生,山西右玉人,本科,研究方向为玉米高产栽培生理。通信地址:832003新疆石河子市北四路221号石河子大学农学院,Tel:0993—2058075,E-mail:wangqunsl@163.com。
通讯作者:刘朝巍,男,1983年出生,吉林抚松人,讲师,博士,研究方向为玉米高产栽培。通信地址:832003新疆石河子市北四路221号石河子大学农学院作物栽培教研室,Tel:0993—2058075,E-maihliuyumi2011@163.com。