Correlation coefficients for leaves (above the diagonal) and flower buds (below the diagonal) between the three antioxidant assay methods and the content of three metabolites with antioxidant activity (n = 280).

* Significant at p≤0.05, and ** significant at p≤0.01. ABTS: 2, 2′-azino-bis (3-ethylbenzthiazoline-6-sulphonic acid); FRAP: ferric ion reducing antioxidant power assay; DPPH: 2,2-diphenyl-1-picrylhydrazyl.Correlation coefficients for leaves (above the diagonal) and flower buds (below the diagonal) between the three antioxidant assay methods and the content of three metabolites with antioxidant activity (n = 280).

* 表示p≤0.05时具有统计学显著性，** 表示p≤0.01时具有高度统计学显著性。ABTS：2,2′-偶氮双(3-乙基苯并噻唑啉-6-磺酸)（2,2′-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid)）；FRAP：铁离子还原抗氧化能力分析法（ferric ion reducing antioxidant power assay）；DPPH：2,2-二苯基-1-苦基肼基（2,2-diphenyl-1-picrylhydrazyl）。本相关性矩阵中，对角线以上为叶片样本的相关系数，对角线以下为花蕾样本的相关系数，展示了3种抗氧化活性检测方法与3种抗氧化活性代谢物含量之间的相关性（n=280）。