Table 3.
Detection of viruses from infected apple and pear shoots before and after incubation at high temperature (HT).
| Experiment | Fruit tree | Virus | No. of plants detected ALSV by RT-PCR | ||
|---|---|---|---|---|---|
| Before HT∗ | Just after HT | After growth at 25°C for 2 months | |||
| 1 | Apple∗∗ | ALSV ACLSV | 9/9 9/9 | 0/9 0/9 | 0/9 9/9 |
| 2 | Apple | ALSV | 7/7 | 0/7 | 0/7 |
| 3 | Pear | ALSV | 7/7 | 0/7 | 0/7 |
| 4 | Pear | ALSV | 8/8 | 0/8 | 0/8 |
∗Apple seedlings were grown at 25°C and then at HT (37°C) for 4 weeks. After that, the seedlings were grown at 25°C for 2 months. ∗∗Apple plants infected with a mixture of ALSV and ACLSV.