TABLE 2.

Plant and fungal biomasses of mycorrhizal and nonmycorrhizal P. sylvestris seedlings treated with elevated Cu concentrations for 10 weeks^a

Fungal treatment	Copper treatment (μM)	Shoot wt (mg)	Root wt (mg)	Wt of mycelium in roots (mg)	Wt of extraradical mycelium (mg)
Cu-tolerant S. luteus UH-Slu-Fg1.6	0.1	165 ± 12 A	286 ± 13 A	78 ± 2 BC	81 ± 5 A
	15	143 ± 9 A	265 ± 10 A	90 ± 3 A	83 ± 6 A
	30	156 ± 8 A	219 ± 13 B	82 ± 6 AB	109 ± 13 A
	60	149 ± 15 A	199 ± 17 B	64 ± 6 C	82 ± 11 A
Cu-sensitive S. luteus UH-Slu-Lsk10	0.1	179 ± 9 A	272 ± 20 A	160 ± 11 A	54 ± 8 A
	15	136 ± 8 B	256 ± 7 A	97 ± 7 A	22 ± 8 AB
	30	128 ± 3 B	217 ± 12 B	80 ± 5 B	8 ± 1 BC
	60	119 ± 11 B	185 ± 12 B	58 ± 6 C	5 ± 1 C
Nonmycorrhizal	0.1	199 ± 27 A	799 ± 50 A
	15	152 ± 24 AB	366 ± 41 A
	30	171 ± 15 A	191 ± 27 B
	60	127 ± 10 B	116 ± 18 C

^aThe values are means ± standard errors of the means (n = 5). Values followed by the same letter within an inoculation treatment are not significantly different (as determined by the Kruskal-Wallis test followed by a multiple-comparison procedure tested for α = 0.05).