科研之友
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摘要
Fruits from forty-two blueberry cultivars, including thirty-six rabbiteye (Vaccinium ashei Reade), three V.similar to ashei hybrid derivatives and three northern highbush (V.similar to corymbosum L.) standards, were evaluated for their antioxidant activities against peroxyl free radicals (ROO), hydroxyl radicals (OH), hydrogen peroxide (H2O2), superoxide radicals () and singlet oxygen (1O2) radicals. The differences in scavenging capacities for these radicals among forty-two selected blueberry cultivars were significant. Oxygen radical absorbance capacity values ranged from 33.8 to 118.7 mu mol Trolox equivalents (TE) g fresh wt-1, 196.1 to 518.8 mu mol TE g dry wt(-1) and 7.1 to 22.2 mu mol cm-2-surface area. Extracts from fruit of pure rabbiteye had higher levels of scavenging capacities of oxygen species , O-2(-1) and H2O2 compared to V. ashei hybrid derivatives and northern highbush blueberry standards. The rabbiteye cultivars Early May and Centurion had the highest scavenging capacity for the reactive oxygen species, not only for ROO and OH, but also for , O-2(-1) and a strong oxidant, H2O2. In contrast, Pink Lemonade (pink-fruited) had the lowest ability to inhibit free radical activity of ROO., .OH, O-1(2), and H2O2.Snowflake had the lowest scavenging capacity for . Blueberry cultivars with high antioxidant activity and radical scavenging capacity have potential to improve human health and can possibly be used as parents for future blueberry breeding programs to develop new blueberry cultivars with higher antioxidant activity.
- 出版日期2011-12
- 单位浙江省农业科学院; rutgers
