First Report of the US1 Strain of Pepino mosaic virus in Tomato in the Canary Islands, Spain

Pepino mosaic virus (PepMV), a member of the genus Potexvirus, was first described in 1974 on pepino (Solanum muricatum Ait.) in Peru. In 1999, PepMV was reported to be affecting tomato (Solanum lycopersicum L.) (3), and currently, the virus is distributed throughout many parts of the world causing...

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Veröffentlicht in:Plant disease. - 1997. - 92(2008), 11 vom: 11. Nov., Seite 1590
1. Verfasser: Alfaro-Fernández, A (VerfasserIn)
Weitere Verfasser: Cebrián, M C, Córdoba-Sellés, C, Herrera-Vásquez, J A, Jordá, C
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2008
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article
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520 |a Pepino mosaic virus (PepMV), a member of the genus Potexvirus, was first described in 1974 on pepino (Solanum muricatum Ait.) in Peru. In 1999, PepMV was reported to be affecting tomato (Solanum lycopersicum L.) (3), and currently, the virus is distributed throughout many parts of the world causing economic losses in tomato crops. This virus induces not only a high variability of symptoms on infected plants, including distortion, chlorosis, mosaic, blistering, and filiformity on leaves and marbling on fruits, but also exhibits substantial genetic diversity. Five strains or genotypes of PepMV have been described, including European tomato (EU), Peruvian (PE), Chilean 2 (CH2), and two American strains, US1 (including CH1) and US2. No correlation has been found between different genotypes and symptom expression of PepMV infection. Studies have demonstrated that field populations of PepMV in Europe belong to EU and US2 or CH2 strains. Mixed infections between these strains and interstrain recombinant isolates are also found (1,2). In Spain, the PE strain was also described, but at a lower relative frequency than other strains (2). In February 2007 in the Canary Islands (Tenerife, Spain), a PepMV isolate (PepMV-Can1) showing the typical leaf symptoms of blistering and mosaic was collected. PepMV was first identified by double-antibody sandwich (DAS)-ELISA with specific antisera against PepMV (DSMZ GMBH, Baunschweig, Germany) according to the manufacturer's instructions. The serological identification was confirmed by reverse transcription (RT)-PCR with two pairs of PepMV-specific primers Pep3/Pep4 and CP-D/CP-R that amplify a fragment of the RNA dependent RNA polymerase (RdRp) gene and the complete coat protein (CP) gene, respectively (2). PCR products were purified and directly sequenced. The amplified RdRp fragment of PepMV-Can1 (GenBank Accession No. EU791618) showed 82% nt identity with the EU and PE strains (GenBank Accession Nos. AJ606360 and AM109896, respectively), but more than 98% identity with the US2 and US1 strains (GenBank Accession Nos. AY509927 and AY 509926, respectively). Sequence information obtained from the amplified CP fragment (GenBank Accession No. EU797176) showed 99% nt identity with US1 and less than 83% with EU, PE, CH2 (GenBank Accession No. DQ000985), and US2. To confirm these results, specific primers for the triple gene block (TGB) were designed using the sequence data from GenBank Accession Nos. AY509926, AY509927, DQ000985, AJ606360, and AM109896. (PepTGB-D:5' GATGAAGCTGAACAACATTTC 3' and PepTGB-R: 5' GGAGCTGTATTRGGATTTGA 3'). A 1,437-bp fragment (GenBank Accession No. EU797177) was obtained, sequenced, and compared with the published sequences, showing 98% nt identity with the US1 strain and less than 86% with the other strains of PepMV. The highest sequence identity in all the studied regions of the PepMV-Can1 isolate was with the US1 strain of PepMV. To our knowledge, this is not only the first report of an isolate of the US1 strain in the Canary Islands (Spain), but also the first report of the presence of this genotype in a different location than its original report (North America). References: (1) I. Hanssen et al. Eur. J. Plant Pathol. 121:131, 2008. (2) I. Pagán et al. Phytopathology 96:274, 2006. (3) R. A. R. Van der Vlugt et al. Plant Dis. 84:103, 2000 
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700 1 |a Córdoba-Sellés, C  |e verfasserin  |4 aut 
700 1 |a Herrera-Vásquez, J A  |e verfasserin  |4 aut 
700 1 |a Jordá, C  |e verfasserin  |4 aut 
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