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An outbreak of Potato spindle tuber viroid in tomato is linked to imported seed

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Brunschot, S. L., Verhoeven, J. T. J., Persley, D. M., Geering, A. D. W., Drenth, A. and Thomas, J. E. (2014) An outbreak of Potato spindle tuber viroid in tomato is linked to imported seed. European Journal of Plant Pathology . pp. 1-7. ISSN 0929-1873

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Article Link: http://dx.doi.org/10.1007/s10658-014-0379-8


In 2011, an outbreak of the quarantine-regulated pathogen Potato spindle tuber viroid (PSTVd) occurred in a commercial glasshouse-grown tomato crop in Queensland, Australia. Phylogenetic studies showed that the genotype of this isolate grouped in a cluster of PSTVd genotypes from tomato and Physalis peruviana, and exhibited an interesting mutation (U257→A) that has previously been linked to lethal symptom expression in tomato. Transmission studies showed that the viroid could be mechanically transmitted from crushed fruit sap, but not from undamaged fruits. A low rate of asymptomatic infection was determined for plants in the affected glasshouse, demonstrating the efficacy of using symptoms to detect PSTVd infections in tomato. No PSTVd infections were detected in solanaceous weeds located outside of the infected glasshouse, excluding them from playing a role in the viroid epidemiology. Monitoring and subsequent testing of new tomato crops grown in the facility demonstrated successful eradication of the pathogen. A trace-back analysis linked the outbreak of PSTVd to an infected imported tomato seed-lot, indicating that PSTVd is transmitted internationally through contaminated seed

Item Type:Article
Business groups:Horticulture and Forestry Science
Additional Information:Eur J Plant Pathol
Keywords:Pospiviroid Solanum lycopersicum Quarantine Inoculation Detection RT-PCR
Subjects:Plant culture > Food crops
Plant pests and diseases > Plant pathology
Plant pests and diseases
Live Archive:03 Jul 2014 04:40
Last Modified:03 Sep 2021 16:49

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