不同北高丛蓝莓品种的抗氧化成分及其抗氧化活性

摘要

In order to provide a theoretical basis for blueberry exploiting and utilization, four northern highbush blueberry cuhivars, including Bluegold, Sunrise, Sierra and Willow, were used as experimental materials. The content of antioxidant substances such as total anthocyanin, soluble polysaccharide, vitamin C and reduced glutathione were analyzed in four northern highbush blueberry cultivars. Moreover, DPPH free radical scavenging ability and superoxide dismutase （SOD） activity were investigated. The correlative relationship between DPPH free radical scavenging ability and four antioxidants were studied. The results indicated that DPPH free radical scavenging ability was significantly related with total anthocyanin content, vitamin C content and reduced glutathione content （P 〈 0.05 ）. The total anthocyanin content, vitamin C content, reduced glutathione content and DPPH free radical scavenging ability in Willow cultivar were significantly higher than that of other three cultivars （P 〈 0.05）. Therefore, Willow cuhivar has the highest antioxidant ability.%以蓝金、日出、塞拉、柳叶4个北高丛蓝莓品种为试验材料，对它们的总花色苷、可溶性多糖、Vc以及还原型谷胱甘肽等4种抗氧化物质的含量进行了测定，并测试了代表抗氧化活性的DPPH自由基清除能力和超氧化物歧化酶（SOD）活性，同时分析比较了4种抗氧化物质与DPPH自由基清除能力之间的相关性关系。研究表明：总花色苷含量、Vc含量以及还原型谷胱甘肽含量与DPPH自由基清除能力间存在显著正相关关系（P〈0．05）。4个品种中柳叶的总花色苷含量、Vc含量、还原型谷胱甘肽含量以及DPPH自由基清除能力均显著高于其他3个品种（P〈0．05），说明柳叶品种的抗氧化性最强。