ISHS Acta Horticulturae 738: International Symposium on Biotechnology of Temperate Fruit Crops and Tropical Species
THE EFFECT OF CO-EXISTING PRUNUS VIRUSES ON TRANSGENIC PLUM POX VIRUS RESISTANT PLUMS |
| Authors: | M. Ravelonandro, J. Kundu, P. Briard, M. Monsion, R. Scorza |
| Keywords: | fruit tree viruses, plums, genetic engineering |
| Abstract:
Co-existing viruses can lead to unexpected symptoms in woody perennial fruit-trees. The appearance of the initial infection and disease development can be unpredictable. Studies based on the effects of mixed infections were conducted with plum pox virus (PPV) in association with apple chlorotic leaf spot (ACLSV), prune dwarf (PDV) and Prunus necrotic ringspot viruses (PNRSV). A transgenic resistant plum, C5 (cv. ‘HoneySweet’) as well as related transgenic PPV-susceptible clones were evaluated. The incidence of symptom development and the use of serological and molecular tests revealed the pathogenic effects of these viruses. Results showed that infection spread of the mixed viruses could be shown throughout the control and transgenic susceptible clones; however, the distribution of PPV was restricted to the basal section of PPV-resistant C5 clone. This phenotype has been already reported in clone C5 when inoculated only with PPV. In this study we show the behavior of the PPV-resistant C-5 clone when PPV is associated with other fruit tree viruses and report on the effects of each virus in Prunus domestica. | |
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