Fig. 11
Concentrations of secondary metabolites in stylo leaves subjected to different Mn treatments. a Total phenols. b Flavonoids. c Tannins. d Anthocyanins. Thirty-day-old stylo plants were treated with 5 to 800 μM MnSO4 for 10 d. Values are the mean of three replicates with standard error bars. Different letters represent significant differences at P < 0.05