Table 2.
Populations of mutant strain PCL1233 with the wild-type (WCS365) on root tips with different plant species and rooting media
| Colonization conditions | Mean log10(CFU + 1)/ cm of root tip
|
|
|---|---|---|
| WCS365 | PCL1233 | |
| Gnotobiotic compact sand column in competition on potato | ||
| Exp. 1 | 5.5a | 0.3b |
| Exp. 2 | 5.4a | 1.4b |
| Strains alone in the gnotobiotic compact sand column | ||
| Potato | — | 5.6a |
| 5.7a | — | |
| Tomato | — | 4.3a |
| 4.4a | — | |
| Wheat | — | 4.1a |
| 5.0a | — | |
| Standard gnotobiotic sand column in competition | ||
| Potato | 3.6a | 1.1b |
| Tomato | 4.2a | 1.6b |
| Wheat | 4.7a | 3.8b |
| Radish | 4.3a | 2.9b |
| Potting soil in competition | ||
| Tomato | 4.1a | 1.4b |
Inoculation was carried out on sterile stem cuttings of potato and germinated seeds of radish, tomato, and wheat (7). In every experiment, 10 plants were inoculated. When values from the same experiment are followed by a different letter, they are significantly different at P = 0.05 according to the Wilcoxon Mann–Whitney test (29).