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Solvent Effects on the Phenolic Compounds and Antioxidant Activity Associated with Camellia polyodonta Flower Extracts

文献类型： 外文期刊

作者： Xiang, Zhuoya 1 ; Liu, Li 1 ; Xu, Zhou 3 ; Kong, Qingbo 1 ; Feng, Shiling 1 ; Chen, Tao 1 ; Zhou, Lijun 1 ; Yang, Hongyu 1 ; Xiao, Yao 1 ; Ding, Chunbang 1 ;

作者机构： 1.Sichuan Agr Univ, Coll Life Sci, Yaan 625014, Peoples R China

2.Sichuan Acad Agr Sci, Inst Agroprod Proc Sci & Technol, Inst Food Nutr & Hlth, Chengdu 610066, Peoples R China

3.Xichang Univ, Panxi Crops Res & Utilizat Key Lab Sichuan Prov, Xichang 615000, Peoples R China

期刊名称：ACS OMEGA （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN： 2470-1343

年卷期： 2024 年 9 卷 25 期

页码：

收录情况： SCI

摘要： Camellia polyodonta flowers contain limited information available regarding the composition of their bioactive compounds and activity. The objective of this study was to identify phenolic compounds and investigate the effect of different solvents (ethanol and methanol) on the phenolic content and antioxidant activity in C. polyodonta flowers. The analysis using UPLC-Q-TOF-MS/MS revealed the presence of 105 phytochemicals and the most common compounds were flavonols, procyanidins, and ellagitannins. Interestingly, flavonol triglycosides were identified for the first time in these flowers. The study demonstrated that the concentration of the solvent had a significant impact on the total phenolic compound (TPC), total flavonoid compound (TFC), and total proanthocyanidin content (TPAC). The TPC, TFC, and TPAC showed a remarkable increase with the increasing concentration of the solvent, reaching their maximum levels (138.23 mg GAE/g DW, 421.62 mg RE/g DW, 60.77 mg PB2E/g DW) at 70% ethanol. However, the total anthocyanin content reached its maximum at low concentrations (0.49 mg CGE/g DW). Similar trends were observed in the antioxidant activity, as measured by the DPPH assay (DPPH radical scavenging activity), ABTS+ assay (ABTS radical cation scavenging activity), and FRAP assay (Ferric reducing antioxidant power). The maximum antioxidant activity was observed at 100% solvents and 70% methanol. Among the 14 individual phenolic compounds, 70% methanol yielded the highest content for 8 (cyanidin-3-O-glucoside, procyanidin B2, procyanidin B4, epicatechin, rutin, kaempferol-3-O-rutinoside, astragaline and quercitrin) out of the 14 compounds. Additionally, it was found that epicatechin was the most abundant phenolic compound, accounting for approximately 20339.37 mu g/g DW. Based on these findings, it can be concluded that 70% methanol is the most effective solvent for extracting polyphenols from C. polyodonta flowers. These results provided chemical information and potential antioxidant value for further research in C. polyodonta flowers.

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