TABLE 2.
Conjugative transfer of plasmid pJP4 between P. chlororaphis and of derivatives of this organism as donors and R. eutropha as the recipient in the A. thaliana rhizosphere
| Strain | Incubation time (days) | No. of bacteria/g of rootsa
|
Transfer efficiency (%)b | ||
|---|---|---|---|---|---|
| Donors (108 CFU) | Recipients (107 CFU) | Exconjugants (106 CFU) | |||
| SPR044 | 14 | 3.8 | 5.5 | 8.7 | 2 |
| 28 | 2.2 | 6.9 | 9.1 | 4 | |
| 42 | 1.4 | 4.5 | 5.8 | 4 | |
| SPR244 | 14 | 2.8 | 5.1 | 6.7 | 2 |
| 28 | 2.6 | 8.4 | 8.4 | 3 | |
| 42 | 2.6 | 8.8 | 9.5 | 4 | |
| SPR644 | 14 | 1.8 | 2.2 | 4.2 | 2 |
| 28 | 1.3 | 5.0 | 3.6 | 3 | |
| 42 | 1.5 | 8.6 | 3.6 | 3 | |
a
Average values for six replicates.
b
Ratio of exconjugants to donor cells.