Table 3.

Results of the Discriminant Analyses based on five antioxidant enzyme levels in roots of the four investigated species.

	Garden-grown plants (N = 15)		Field-collected plants (N = 41)
	Wilks' lambda = 0.003, df = (5, 3, 11), F = 9.9***		Wilks' lambda = 0.17, df = (5, 3, 37), F = 5.5***
	F-to remove	Tolerance	F-to remove	Tolerance
APX	7.09	0.65	3.35	0.69
POX	5.65	0.26	1.26	0.43
CAT	4.19	0.57	13.91	0.63
GR	0.07	0.83	5.37	0.83
SOD	2.42	0.27	1.81	0.38

^***P < 0.001.