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Título

The incidence and distribution of viruses infecting lettuce, cultivated Brassica and associated natural vegetation in Spain

AutorMoreno, Aránzazu ; Blas, C. de; Biurrun, R.; Nebreda, Miguel; Palacios, Itziar ; Duque, M.; Fereres, Alberto
Palabras claveBrassica
Lettuce
Alfalfa mosaic virus
Broad bean wilt virus 1
Beet western yellows virus
Cauliflower mosaic virus
Cucumber mosaic virus
Lettuce mosaic virus
Pea seed-borne mosaic virus
Turnip mosaic virus
Tomato spotted wilt virus (TSWV)
Virus reservoirs
Multiple infections
Fecha de publicación1-jun-2004
EditorAssociation of Applied Biologists
CitaciónAnnals of Applied Biology, Volume 144, Number 3, 1 June 2004 , pp. 339-346(8)
ResumenA virus survey was conducted during the spring and autumn of 2001 and 2002 to determine the presence, prevalence and distribution in Spain of the viruses that are most commonly found infecting lettuce and Brassica worldwide. Crop plants showing virus symptoms from the principal lettuce and Brassica-growing regions of Spain, and some samples of the annual and perennial flora nearby, were tested by enzyme-linked immunosorbent assays using specific commercial antibodies against the following viruses: Alfalfa mosaic virus (AMV), Broad bean wilt virus 1 (BBWV-1), Beet western yellows virus (BWYV), Cauliflower mosaic virus (CaMV), Cucumber mosaic virus (CMV), Lettuce mosaic virus (LMV), Pea seed-borne mosaic virus (PSbMV), Turnip mosaic virus (TuMV) and Tomato spotted wilt virus (TSWV). Samples were also tested with a Potyvirus genus antibody. Virus incidence was much lower in spring than in autumn, especially in 2001. In spring 2002, CMV and LMV were the most prevalent viruses in lettuce, while CaMV was the most important virus present in Brassica crops grown in Navarra, followed by CMV and BWYV. In the autumn, the spectrum of viruses was different; potyviruses were widespread in lettuce grown in Madrid, but TSWV and BWYV were predominant in the Murcia region. The prevalent Potyvirus detected in lettuce fields was LMV, but none of the samples collected were positive for PSbMV or TuMV. In Brassica crops, TSWV was the most abundant in autumn-sown crops, especially in the Navarra region. All of the viruses present in lettuce and Brassica were also frequently detected in their associated natural vegetation at the same time, suggesting that they probably play an important role as virus reservoirs. Sonchus spp. were particularly common and were frequently infected with CMV, LMV and BWYV. Another common species, Chenopodium album, was often infected with TSWV and BWYV. Multiple infections were common, especially in non-crop plants, and the most common combination was BWYV and TSWV. The role of weeds in the epidemiology of viruses that infect lettuce and Brassica crops in Spain is discussed.
Versión del editorhttp://dx.doi.org/10.1111/j.1744-7348.2004.tb00349.x
URIhttp://hdl.handle.net/10261/11280
DOI10.1111/j.1744-7348.2004.tb00349.x
ISSN0003-4746
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