Table 2.
Effects of B. phytofirmans PsJN on plant growth in different switchgrass cultivars
| Cultivars | Treatment | No. plants | Root length (cm) | Shoot length (cm) | Total fresh weight (mg) | PsJN/control (%)a |
|---|---|---|---|---|---|---|
| Shawnee |
Control |
24 |
2.3 |
8.4 |
50.1 |
|
| |
PsJN |
24 |
2.1 |
7.8 |
58.8 |
117.4 |
| |
p-valueb |
|
0.2037 |
0.2049 |
0.0717 |
|
| Nebraska |
Control |
24 |
1.5 |
10.3 |
40.9 |
|
| |
PsJN |
24 |
1.5 |
11.6 |
51.9 |
126.8 |
| |
p-value |
|
0.4160 |
0.0656 |
0.0055 |
|
| Forestburg |
Control |
34 |
1.6 |
8.6 |
33.7 |
|
| |
PsJN |
30 |
1.8 |
12.7 |
54.0 |
160.1 |
| |
p-value |
|
0.1986 |
0.0000002 |
0.0000001 |
|
| Shelton |
Control |
28 |
3.3 |
14.1 |
117.7 |
|
| |
PsJN |
28 |
3.0 |
12.0 |
135.3 |
115.0 |
| |
p-value |
|
0.1579 |
0.0067 |
0.0907 |
|
| Blackwell |
Control |
28 |
1.4 |
9.9 |
52.6 |
|
| |
PsJN |
28 |
1.5 |
11.3 |
64.7 |
123.0 |
| |
p-value |
|
0.2970 |
0.0998 |
0.0543 |
|
| Sunburst |
Control |
30 |
0.8 |
8.5 |
33.0 |
|
| |
PsJN |
28 |
0.9 |
10.4 |
26.4 |
80.0 |
| |
p-value |
|
0.2985 |
0.0137 |
0.0731 |
|
| Cave-in-Rock |
Control |
33 |
2.8 |
14.7 |
107.8 |
|
| |
PsJN |
34 |
3.1 |
13.8 |
113.4 |
105.2 |
| p-value | 0.2317 | 0.4052 | 0.5613 |
a PsJN/control (%) means total fresh weight of PsJN inoculated plants over that of control plants.
b p-value means degrees of statistical significance between PsJN treatment and control using student T-test.