Abstract:

To provide theoretical reference for the development and utilization of rose varieties, we used dry buds of seven rose varieties as the materials, and determined the antioxidant capacity of the tested materials by DPPH method, salicylic acid method, pyrogallol autoxidation method and chelating metal ion method. Then the antioxidant capacity of the materials was evaluated comprehensively by membership function method. The results showed that the ferric ion reducing power of all tested materials was more than 70%. The highest was found in Rosa rugosa ‘Kushui’ (99.33%), and the lowest was found in R. damascena ‘Hetian’ (77.66%). The scavenging rate of OH^-· of R. ‘Crimson Glory’ was significantly higher than that of other tested varieties, and that of ‘France’ rose (33.62%) and R. rugosa ‘Kushui’ (31.42%) were significantly lower than that of other varieties. The scavenging rate of superoxide anion of R. rugosa ‘Kushui’ was the highest (82.13%), and that of Rosa rugosa Plena in Changbai Mountain was the lowest (26.53%), and that of the other varieties was between the above two. The DPPH clearance rate of all varieties was above 90%, and there was no significant difference among the varieties. The DPPH clearance rate of ‘France’ rose was the highest (94.56%), and that of R. rugosa ‘Kushui’ was the lowest (93.72%). The antioxidant activity of the tested materials was evaluated comprehensively by membership function method. The antioxidant capacity from high to low was: R. ‘Crimson Glory’> R. rugosa ‘Kushui’> R. forrestiana ‘Jinbian’> R. rugosa Plena in Changbai Mountain > ‘France’ rose> R. damascena ‘Hetian’ > ‘Pingyin’ rose.

Key words: Rosa rugosa, dry flower buds, antioxidant capacity, membership function method, comprehensive evaluation