文献类型：期刊文献

英文题名：Flavonol profiles of mature leaves allow discriminating Toona sinensis Roem from different north-south geographical origins across China with varied antioxidant activities

作者：Su, Shang[1] Wang, Lijin[2] Geng, Yonghang[1] Wang, Junhui[1]

第一作者：苏上

通信作者：Wang, JH[1];Wang, LJ[2]

机构：[1]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat, State Forestry Adm,Res Inst Forestry, Beijing 100091, Peoples R China;[2]Beijing Technol & Business Univ, Sch Food & Hlth, Lab Mol Sensory Sci, Beijing 100048, Peoples R China

年份：2024

卷号：10

期号：5

外文期刊名：HELIYON

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001202053400001)】；

基金：This study was supported by the National Natural Science Foundation of China (grant No. 31700603) and the Dazhu County Science and Technology Project (grant No. 2022NCG0011) .

语种：英文

外文关键词：Toona sinensis; HPLC; Acylated flavonol; Geographic origin; Quality control

摘要：Toona sinensis (A. Juss.) Roem, a multipurpose economic tree, is widely cultivated across Asia, but its high-yielding mature leaves are largely overlooked. This study systematically analysed the flavonols in the mature leaves of T. sinensis from 44 different geographic locations across China, using HPLC-DAD and HPLC-ESI-MS2 techniques. In total, 18 flavonols were detected, among which 6 (f1, f3, f7, f14, f15, and f17) were firstly identified in this plant. Significant variations in quality among different T. sinensis varieties were observed (p < 0.01). Through OPLS-DA analysis, all samples could be clearly categorised into two distinct geographical groups. The northern varieties (N1-N20) exhibited concise flavonol fingerprints with higher total flavonol content (TFC) (727.55 +/- 22.79 mg/100 g fresh weight, FW), predominantly non-acylated flavonols (705.95 +/- 21.65 mg/100 g FW), particularly quercetin glycosides (614.60 +/- 22.76 mg/100 g FW). In contrast, the southern varieties (S1-S24) presented more intricate flavonol profiles with lower TFC (622.81 +/- 21.82 mg/100 g FW) and balanced amounts of quercetin (344.75 +/- 16.41 mg/100 g FW) and kaempferol glycosides (278.06 +/- 12.29 mg/100 g FW). Notably, the southern samples possessed higher content of acylated flavonols (184.50 +/- 12.87 mg/100 g FW), especially galloylated ones, which contributed to their heightened antioxidant activities. Quercetin 3-O-rhamnoside (f11') and kaempferol 3-O-galloyglucoside (f11) were determined to be the crucial biomarkers for quality discrimination. Considering quality control of mature T. sinensis leaves as potential resources for natural flavonol extraction, this study suggested that their northern/southern geographic origins should be distinguished first. Additionally, the flavonol profiles allow for discriminating the origin and assessing the quality of T. sinensis.