TABLE 3.
Willow and poplar clone cuttings tested for the presence of B. salicis bacteria in their vascular fluida
| Clone no. (species) | Age (yr)b | 553-bp bandc |
|---|---|---|
| 95021/4 (S. longifolia) | 2 | − |
| 95022/5 (S. triandra) | 2 | − |
| S.96001 (S. fragilis × S. alba) | 2 | − |
| 880309, 77683, 78118 | 3 | − |
| 82.237 (S. alba hybrid) | 4 | + |
| 82.240 (S. alba hybrid) | 4 | − |
| 82.276 (S. fragilis) | 5 | + |
| 82.284 (S. fragilis hybrid) | 5 | − |
| 82.320 (S. alba × S. fragilis) | 5 | − |
| 82.242 (S. alba) | 5 | − |
| 81.003 (not determined) | 5 | − |
| (P. nigra) | ? | + |
| 71051/19 (P. nigra × P. nigra) | ? | − |
| F22 (P. nigra) | ? | − |
a
The cuttings were not artificially infected with B. salicis. The plants did not show any internal or external symptoms of the watermark disease.
b
?, unknown.
c
Presence (+) or absence (−) of 553-bp band after PCR amplification with primer pair ES1a-ES4b.