Table 1.
Motility of the Rhizobium leguminosarum bv. trifolii wild-type and the pssA mutant strains assayed in different media.
| Strain | Migration distance (mm) a | |||||
|---|---|---|---|---|---|---|
|
| ||||||
| M1 | 79CA | TY | ||||
|
| ||||||
| 0.3% | 0.7% | 0.3% | 0.7% | 0.3% | 0.7% | |
| Rt24.2 (wild-type) | 9.5 ± 1.0 | 3.5 ± 0.5 | 19 ± 2.0 | 6.5 ± 1.0 | 15 ± 2.0 | 4.0 ± 0.5 |
| Rt270 (pssA) | 4.5 ± 0.5 * | 2 ± 0.5 * | 11 ± 1.0 * | 1.5 ± 0.5 * | 7.0 ± 0.5 * | 1.5 ± 0.5 * |
a
Migration of bacteria was determined after four-day incubation at 28 °C by measuring the distance from the injection site of bacterial suspensions into agar;
*
indicates a statistically significant difference in migration zones compared to the wild-type strain (p value < 0.005; Student’s t test).