Table 4.
Competitiveness of co-inoculated Sp+ and Sp− strains on Alnus glutinosa host plants.
| Inoculated strains | Sp+ / Sp− ratio | Nb nodule per plant | Nodule proportions (%)1 | |||
|---|---|---|---|---|---|---|
|
|
|
|||||
| Sp+ | Sp− | Sp+ | Sp− | Sp+/Sp− | ||
| AgTyI.5 | None (Sp+ control) | 100/0 | 10.0±1.3 | 100.0 | 0.0 | 0.0 |
|
| ||||||
| Mg60Ag2 | 85/15 | 8.2±1.0 | 96.7 | 0.0 | 3.3 | |
| 50/50 | 6.9±1.0 | 84.2 | 0.0 | 15.8 | ||
| 15/85 | 5.9±0.6 | 98.3 | 1.7 | 0.0 | ||
|
| ||||||
| ACN14a | 85/15 | 7.5±1.9 | 100.0 | 0.0 | 0.0 | |
| 50/50 | 7.4±2.2 | 96.6 | 0.0 | 3.4 | ||
| 15/85 | 4.3 *±0.8 | 100.0 | 0.0 | 0.0 | ||
|
| ||||||
| AgTrS1 | None (Sp+ control) | 100/0 | 12.3±2.1 | 100.0 | 0.0 | 0.0 |
|
| ||||||
| Mg60Ag2 | 85/15 | 10.2±1.3 | 96.7 | 0.0 | 3.3 | |
| 50/50 | 8.9±1.9 | 100.0 | 0.0 | 0.0 | ||
| 15/85 | 6.7±1.1 | 96.7 | 0.0 | 3.3 | ||
|
| ||||||
| ACN14a | 85/15 | 12.5±1.9 | 100.0 | 0.0 | 0.0 | |
| 50/50 | 9.0±1.8 | 100.0 | 0.0 | 0.0 | ||
| 15/85 | 6.2±1.2 | 100.0 | 0.0 | 0.0 | ||
1
Sp+: % of nodules with strain AgTyI.5 or AgTrS1; Sp−: % of nodules with strain Mg60Ag2 or ACN14a; Sp+/Sp−: both Sp+ and Sp− co-existing strains.
*
Significantly different from the corresponding Sp+ control plants (without Sp− co-inoculation, grey lines), using Tukey’s HSD tests (p-value<0.05).