Table 3.

(A) P-values of the two-way ANOVA for the effects of the factors “Copper contamination” and “Mycorrhizal inoculation treatment” and their interaction; (B) Soil dehydrogenase activity (in mg TPF g⁻¹ dry weight) and root mycorrhizal colonization rate in Touriga Nacional plants grafted onto 1103 Paulsen rootstock at the end of the growing season.

(A) Factor	Soil dehydrogenase activity		Root mycorrhizal colonization rate
Copper contamination	<0.0001		0.744
Mycorrhizal inoculation treatment	0.287		0.575
Interaction	0.567		0.919
(B) Inoculation treatment	Soil dehydrogenase activity		Root mycorrhizal colonization rate
	Non-contaminated soil	Cu-contaminated soil	Non-contaminated soil	Cu-contaminated soil
Non-inoculated	13.80 ± 1.386 a	0.67 ± 0.086 b	0.54 ± 0.069 a	0.49 ± 0.070 a
Inoculated with R. irregulare	12.34 ± 0.812 a	0.49 ± 0.069 b	0.55 ± 0.034 a	0.59 ± 0.026 a
Inoculated with F. mosseae	13.64 ± 1.689 a	0.50 ± 0.069 b	0.51 ± 0.059 a	0.52 ± 0.053 a

Data represent average values (n = 5) ± standard error. Different letters indicate significant differences among treatments according to Tukey b a posteriori tests at p-value ≤ 0.05.