Table 3.

Correlation matrix

	Fe total	Fe ex	Zn total	Zn ex	Mn total	Mn ex	Cu total	Cu ex	Total flavonoids
Fe total	1
Fe ex	−0.16	1
Zn total	0.01	0.09	1
Zn ex	−0.01	−0.04	0.36	1
Mn total	−0.05	0.45	0.03	0.09	1
Mn ex	−0.15	0.41	0.06	0.22	0.80	1
Cu total	0.13	−0.36	−0.12	−0.29	−0.06	−0.21	1
Cu ex	−0.03	−0.32	−0.25	−0.15	−0.01	−0.09	0.72	1
Total flavonoids	−0.35	0.29	0.33	0.25	0.25	0.18	−0.05	0.13	1

Statistically significant correlation coefficients (α < 0.05) are in italics

ex water-extractable species