期刊
FRONTIERS IN CHEMISTRY
卷 6, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2018.00009
关键词
systematic approach; synergistic antioxidant; flavonoids; red leaves; Malus crabapple
资金
- National Natural Science Foundation of China [31372057]
- Beijing Postdoctoral Research Foundation [2017-22-006]
- Beijing Collaborative Innovation Center for Eco-environmental Improvement with Forestry and Fruit Trees [CEFF-PXM2017_014207_000043]
- Agricultural Science and Technology Project of Beijing Municipal Commission of Rural Affairs [20150121]
- Beijing Key Laboratory of New Technology in Agricultural Application [kf2017021, KF2016024]
- Beijing Key Project of Science and Technology Plan [D161100000716003]
- Scientific Research Improvement Project of Beijing University of Agriculture [GZL2014003]
The flavonoid system comprises an abundance of compounds with multiple functions; however, their potential synergismin antioxidant function remains unclear. We established an approach using ever-red (RL) and ever-green leaves (GL) of crabapple cultivars during their development to determine interrelationships among flavonoid compounds. RL scored significantly better than GL in terms of the type, composition, and diversity of flavonoids than GL. Principal component analysis predicted flavonoids in RL to have positive interaction effects, and the total antioxidant capacity was significantly higher than the sum of antioxidant capacities of the individual compounds. This synergy was verified by the high antioxidant capacity in rat serum after feeding on red leaves. Our findings suggest that the synergistic effect is a result of the high transcription levels regulated by McMYBs in RL. In summary, individual flavonoids cooperate in a flavonoid system, thus producing a synergistic antioxidant effect, and the approach used herein can provide insights into the roles of flavonoids and other compounds in future studies.
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