Figure 5From: Effects of aluminum on nucleoli in root tip cells and selected physiological and biochemical characters in Allium cepa var. agrogarumLEffects of different concentrations of Al on the activities of three antioxidant enzymes in Allium cepa var. agrogarum L. exposed to Al stress over 12 days. a SOD in leaves, b SOD in roots, c POD in leaves, d POD in roots, e CAT in leaves, f CAT in roots. Vertical bars denote SE. Values with different letters differ significantly from each other (P < 0.05, t-test).Back to article page