Fig. 4
From: Dynamic polyphenolic profiling of soybean seeds and leaves during developmental stages

Quantitative comparison of flavonoids (A, kaempferol, luteolin, quercetin, and rutin) and isoflavones (B, daidzein, daidzin, genistein, and genistin) across soybean cultivars and developmental stages. Flavonoids were predominantly detected in leaves, with minimal or no presence in seeds. Isoflavone glycosides (daidzin and genistin) showed peak concentrations in seeds, while aglycones (daidzein and genistein) were highest at the V4 stage. Data represent mean concentrations (μg/g dry weight).