不同大麦叶片抗氧化活性研究

Study on the Antioxidative Activity in Different Barley Leaves

研究14个大麦种质叶片中甜菜碱、总黄酮含量和抗氧化活性,并将这2种物质与叶片的抗氧化活性进行了相关性分析。试验结果显示:14个大麦种质间甜菜碱、总黄酮含量和抗氧化能力不尽相同,平均甜菜碱和总黄酮含量分别为4.392 8 mg/g(以鲜重计)和2.023 5 mg/g(以鲜重计),且14个大麦种质叶片对DPPH.、OH.和ABTs+.自由基都有一定的清除能力;甜菜碱、总黄酮含量和抗氧化能力之间的相关性分析表明黄酮类物质含量与大麦叶片消除DPPH.和OH.自由基之间具有一定的相关性,而甜菜碱含量与大麦叶片清除OH.自由基之间呈显著相关性。

This paper studied the contents of betaine,total flavonoids and antioxidative activity of leaves in 14 genetic resources of barley.The relationships of the two components and the antioxidative activity were also analyzed.The results showed that there were differences in the contents of betaine,total flavonoids and antioxidative activity in 14 genetic resources of barley.The average contents of betaine and total flavonoids were 4.392 8 mg/g and 2.023 5 mg/g of green weight.The leaves of 14 barley were also shown to have certain scavenging effect on free radicals of DPPH·,OH· and ABTs＋·.The analysis of relationships between the two components and the antioxidative activity showed that the total content of flavonoids in barley leaves had certain correlation with scavenging effect on free radicals of DPPH· and OH·,but the content of betaine had significant correlation with scavenging effect on free radicals of OH·.