Fig. 8: Correlation analysis between flavonoids and antioxidant activity.

A Correlation network heat map between antioxidant activity and 14 differential metabolites of flavonoids. The red curve represents a positive connection, whereas the blue curve represents a negative correlation. The solid line of the P-value represents a statistically significant correlation, whereas the dotted line represents a connection that is not statistically significant. The color of the heatmap and the size of the square represent the respective correlation coefficients. The intensity of the color and the size of the box directly correspond to the magnitude of the correlation coefficient. The larger the correlation coefficient, the redder the color and the larger the box; Conversely, The smaller the correlation coefficient, the bluer the color and the smaller the box. B Chemical structural formulae for flavonoids. Solid triangular carbon implies that the bond is above the plane of the carbon ring, whereas imaginary triangular carbon suggests that the bond is below it.