丹参须根乙醇提取物抗氧化及抑真菌活性研究

以没食子酸为标准品,对丹参须根乙醇提取物各萃取物中酚性化合物含量进行测定,并采用DPPH.法对各萃取物进行自由基清除实验;以3种植物病原真菌为供试菌,采用离体实验方法对丹参须根乙醇提取物各萃取物进行抑菌效果研究。结果表明,(1)石油醚、氯仿、乙酸乙酯、正丁醇萃取物及水溶物5部分的酚性成分含量依次为2.74%、11.11%、51.48%、31.80%、1.69%。(2)抗氧化实验显示,各部分清除DPPH.的IC50值分别为210.00、122.00、6.00、42.001、0 277.00μg.mL-1。(3)相关性分析表明,丹参须根乙醇提取物各萃取部分的抗氧化活性主要源于其中的酚性化合物。(4)在浓度为1 mg.mL-1时,石油醚萃取相抑菌效果最好,对番茄灰霉、棉花立枯、苹果炭疽3种病原菌抑菌率为81.44%、85.58%、82.73%。(5)不同浓度石油醚萃取相对相同病原菌的抑菌效果差异显著,对番茄灰霉、棉花立枯、苹果炭疽病原菌的72 hEC50值分别为0.361 5、0.422 1、0.270 8 mg.mL-1。

Antioxidant and Antifungal Activities of Ethanol Extract from Salvia miltiorrhiza Fibrous Roots

The alcoholic extracts of Salvia miltiorrhiza fibrous roots were further extracted by diffferent solvents,respectively.The contents of phenols in each extract were measured by using gallic acid as standard compound.DPPH free radical scavenging activity and antimicrobial activity of different extracts were measured.The results showed that the contents of phenols were 2.74%,11.11%,51.48%,31.80% and 1.69% in the extracts of petroleum ether,chloroform,ethyl acetate,n-butanol,and water,respectively;the correspon...