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Response of selected Prunus rootstock clones to infection by Prune dwarf virus and Prunus necrotic ringspot virus


Response of selected Prunus rootstock clones to infection by Prune dwarf virus and Prunus necrotic ringspot virus



European Journal of Horticultural Science 68(1): 45-49



ISSN/ISBN: 1611-4426

Due to the economic importance of sweet cherry production and virus tolerance, a range of rootstock clones (hybrids of Prunus spp.) has for some time been under study for response to infection by the pollen-borne Prune dwarf virus (PDV) and Prunus necrotic ringspot virus (PNRSV). The plants were artificially inoculated by bark grafting using well-prepared inocula. Throughout the phases of preparation and investigation all the plants were grown in containers filled with sterilized soil-substrate and were kept under conditions excluding accidental infection. Virus replication in the leaf tissue was checked for by DAS-ELISA. Data of growth parameters (leaf and shoot development) and virus symptom expression (description and evaluation of number of leaves showing symptoms compared to overall number of leaves) was recorded weekly. Two types of virus response were observed and will be discussed for their epidemiological importance: a) tolerance as a tool to guarantee economically efficient cultivation e.g. of cherries under conditions where accidental infection has to be taken into account; b) hypersensitivity as a prerequisite to stop infection and save valuable plants (e.g. seed and scion source trees) under conditions where accidental infection is relatively unlikely but could have costly consequence in case of occurrence.

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Accession: 011292626

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