Pb
treatments
(mg kg^{1}) 
Inoculation
treatments 
Root colonization of plants 
Cu0^{1} 
Cu100 
Cu200 
0 
M^{2} 
0.0 d3 
0.0 d 
0.0 d 

+M 
69.0 a 
54.9a 
35.5a 
300 
M 
0.0d 
0.0 d 
0.0 d 

+M 
44.6 b 
26.0 c 
29.0 b 
600 
M 
0.0d 
0.0d 
0.0d 

+M 
24.6c 
35.1b 
15.9 c 
Significance^{4} of: 




Pb addition level: 


*** 

Inoculation: 


*** 

Cu addition level: 


*** 

Pb×inoculation: 


*** 

Pb×Cu: 


** 

Cu×inoculation: 


*** 

Pb×Cu×inoculation: 


** 

^{1}Cu0, Cu100, Cu200: Cu application rate of 0, 100 and 200 mg kg^{1}.
^{2}–M, +M: uninoculated control, inoculation with the mycorrhizal fungus G.mosseae.
^{3}In each column, means followed by the same letter are not significantly different
by LSD at the 5% level.
4By analysis of variance; *** p<0.001; ** p<0.01 