H_2O_2对药用植物活性成分含量的影响

目的：研究外源H2O2对中药材抗氧化物质含量及总抗氧化能力的影响。方法：采收前10天分别对5种药材的花、果实及叶片进行250 ml 0.3%H2O2的喷洒处理,之后测定药材中黄酮、维生素C和维生素E含量的变化及总抗氧化能力的变化。结果：0.3%的H2O2处理后,药材中的黄酮、维生素C和维生素E含量被不同程度地提高了,丁香花中分别提高了59.9%、41.1%和46.9%,野蔷薇果实和山楂果实提高幅度在20%以下,叶片类药材的提高幅度介于花与果实之间。检测药材中总抗氧化能力的变化时得出了类似的结果。结论：H2O2能提高药材活性成分的含量,提高幅度与药用植物的器官有关。

Effect of H_2O_2 on Active Compounds Content in Medicinal Plants

Objective：Studying the effect of exogenous H2O2 on antioxidant content and antioxidant capacity in medicinal plants.Methods：The medicine plants were treated by 0.3% H2O2 for 10 days before harvest,and then the contents of flavonoids,vitamin C and vitamin E and the total antioxidant capacity were determined.Results：The contents of flavonoids,vitamin C and vitamin E in medicine plants were increased by 0.3% H2O2,and it was increased by 59.9%,41.1% and 46.9% respectively in flower of Flos Caryophyllata.The increase level in fruit of Rosa multiflora Thunb and Crataegus pinnatifida Bge was below 20%,and the increase level in leaves was between flower and fruit.The similar results were obtained in total antioxidant capacity.Conclusion：The active compounds in medicinal plant can be increased by exogenous H2O2,and the increase level is depend on different organ.