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Xu Feng, Wang Tao, Yu Ling, Zhang Li, Zhang Li. Dynamic changes in effective chemical constituents and antioxidant activities in Paeonia lactiflora Pall. during the sun-drying process[J]. Plant Science Journal, 2017, 35(5): 783-789. DOI: 10.11913/PSJ.2095-0837.2017.50783
Citation: Xu Feng, Wang Tao, Yu Ling, Zhang Li, Zhang Li. Dynamic changes in effective chemical constituents and antioxidant activities in Paeonia lactiflora Pall. during the sun-drying process[J]. Plant Science Journal, 2017, 35(5): 783-789. DOI: 10.11913/PSJ.2095-0837.2017.50783

Dynamic changes in effective chemical constituents and antioxidant activities in Paeonia lactiflora Pall. during the sun-drying process

  • To investigate the changes in the active ingredients and antioxidant capacity of fresh peony roots in the post-harvest drying process, the contents of paeoniflorin, albiflorin, and benzoylpaeoniflorin in the root during natural drying were determined by high performance liquid chromatography, and antioxidant activities of the materials were detected. Results showed that the content of paeoniflorin and benzoylpaeoniflorin increased at first and then degraded gradually, whereas albiflorin first decreased and then increased. Free radical scavenging ability, including that of 1,1-diphenyl-2-picrylhydrazyl (DPPH) and superoxide anion, as well as inhibition of lipid peroxidation, were significantly increased in the roots during the early phase of the drying process, and there was a significant positive correlation with the content of paeoniflorin. Therefore, the mechanism of resistance to drought stress in the early stage of peony growth might be related to the increase in antioxidant activity and induction of the content of related active ingredients (such as paeoniflorin).
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