Table 2.

Total antioxidant capacity and concentration of total thiols in extracts from roots of the control plants growing in water or from roots of tomato seedlings treated with CAN (10 or 50 µM) for 24 and 72 h.

Plant treatment	Total antioxidant capacity		Total thiol content
	(% of DPPH reduction)		(µmol TNB g-1 FW)
	24 h	72 h	24 h	72 h
Control (water)	41.2 ± 8.0	57.1 ± 9.5		0.15 ± 0.02	0.16 ± 0.03
CAN 10 µM	36.6 ± 5.5	65.9 ± 11.2		0.29 ± 0.04*	0.33 ± 0.05*
CAN 50 µM	64.2 ± 4.3*	87.4 ± 5.1*		0.21 ± 0.02*	0.38 ± 0.03*

Values are average ± SD of three to four repetitions. Asterisks (*) indicate significance between treatments and the control at the same time of culture period at P ≤ 0.05, based on Student’s test.