Table I.

Maximal extractable enzyme activities in leaves of different lines of transformed poplars overexpressing FeSOD or WT for eight untransformed and four transformed poplar plants in each case

Plant Line	SOD	APX	MDHAR	DHAR
	units mg−1 protein	μmol mg−1 protein
WT	1.18  ± 0.28	0.94  ± 0.12	0.40  ± 0.02	0.18  ± 0.03
4SOD	8.22  ± 0.86	1.15  ± 0.06	0.40  ± 0.02	0.29  ± 0.06
6SOD	9.00  ± 0.87	1.15  ± 0.21	0.39  ± 0.04	0.42  ± 0.04
8SOD	7.24  ± 0.48	1.02  ± 0.13	0.45  ± 0.03	0.40  ± 0.07
9SOD	9.92  ± 0.80	1.18  ± 0.07	0.40  ± 0.02	0.40  ± 0.03
5SOD	12.32  ± 1.46	0.75  ± 0.28	0.39  ± 0.02	0.36  ± 0.04