ISHS Acta Horticulturae 94: XI International Symposium on Fruit Tree Virus Diseases
RESEARCH NOTE ON THE DIFFUSION OF ILAR VIRUS IN A COLLECTION OF VARIETIES OF PRUNUS DOMESTICA L. |
| Author: | R.F. GELLA |
| Abstract:
Studies on pollen transmission of ILAR type of virus have been carried out during four years on 49 cultivars of Prunus domestica. Trees were planted in 1971, 1972 and 1973, and each cultivar was represented by four or five individuals. All trees of twelve varieties were already contaminated at planting. The transmission rate of contamination was always lower than 2% each year. Seed germination of ILAR infected trees after a four months stratification period at 3°C ± 1 varied between 41% and 100% viable seeds, and variability seemed influenced more by varietal characteristics or stratification treatment than by the virus effect itself. Pollen morphology, germination rate and pollen tube growth were also studied. There was no incidence of virus diseases transmitted by pollen grains on tree crop in any year. However, it would be most interesting to follow the possible contamination side effects on the accumulated tree crops. | |
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