Pb treatment
(mg kg
-1
)
CAT
U g
-1
min
-1
SOD
U g
-1
FW
POD
U mg
-1
min
-1
0
Control
2.63 ± 0.13
b
80.70 ± 5.72
a
113.25 ± 7.11
c
Act12
3.14 ± 0.14
c
85.70 ± 4.41
b
146.02 ± 5.38
d
⊿Ctrl (%)
19.3*
6.2
16.8*
200
Control
2.48 ± 0.23
b
95.69 ± 4.17
b
107.35 ± 3.72
c
Act12
2.57 ± 0.22
ab
104.22 ± 2.92
c
113.25 ± 7.05
b
⊿Ctrl (%)
3.6
8.9*
5.5
300
Control
2.33 ± 0.19
b
107.35 ± 5.72
c
94.22 ± 1.86
b
Act12
2.77 ± 0.12
b
113.82 ± 4.64
a
115.69 ± 8.65
b
⊿Ctrl (%)
19.0*
6.0
22.8*
500
Control
1.55 ± 0.24
a
135.05 ± 6.62
d
67.70 ± 3.52
a
Act12
2.52 ± 0.10
ab
176.02 ± 6.63
d
131.49 ± 7.70
c
⊿Ctrl (%)
62.4*
30.3*
94.2*
1,000
Control
1.38 ± 0.25
a
71.49 ± 5.40
a
62.67 ± 2.34
a
Act12
2.35 ± 0.21
a
113.25 ± 7.11
c
89.82 ± 4.87
a
⊿Ctrl (%)
70.3*
58.4*
43.3*
Table 1:
Leaf antioxidant enzyme activity (catalase activity, CAT; superoxide dismutase, SOD; peroxidase activity, POD.) of perennial ryegrass in Pb-treated soil inoculated with or without
Streptomyces pactum
Act12 (means ± SD, n = 3).
