Ocorrência generalizada do Lettuce mottle virus em três regiões produtoras de alface comercial do Estado de São Paulo

High-throughput sequencing of two lettuces showing virus-like symptoms in France provided evidence of infection by members of the Secoviridae family. One plant (JG1) had a complex mixed infection that involved, among others, a novel Waikavirus (lettuce waikavirus 1) and two isolates of a sequivirus related to lettuce mottle virus (LeMoV). The second lettuce plant (JG2) was single infected by LeMoV. Complete genomic sequences were obtained for all four isolates and, in addition, near complete genome sequences were obtained for other LeMoV or LeMoV-related isolates (from French cultivated and wild lettuces, and from a Brazilian cultivated lettuce) and for two isolates of another Asteraceae-infecting sequivirus, dandelion yellow mosaic virus (DaYMV). Analysis of these genomic sequences allows to propose tentative genome organization for the various viruses and to clarify their phylogenetic relationships. Sequence and host range comparisons point to significant differences between the two sequivirus isolates identified in the JG1 plant and LeMoV isolates from France and Brazil, suggesting they belong to a novel species for which the name lettuce star mosaic virus is proposed.

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Molecular and Biological Characterization of Novel and Known Family Secoviridae Members Infecting Lettuce

Svanella-Dumas

Τsarmpopoulos

Marais

et al. 2023

Phytopathology®

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Levantamento revela a predominância do Lettuce mottle virus em três regiões produtoras de alface no Estado de São Paulo

et al. 2012

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Among the phytosanitary problems affecting lettuce culture are the diseases caused by viruses. Three viruses cause almost indistinguishable mosaic symptoms: Lettuce mosaic virus (LMV, Potyvirus), Lettuce mottle virus (LeMoV, Sequivirus) and Bidens mosaic virus (BiMV, Potyvirus). By RT-PCR using specific primers for each virus, lettuce and weed samples, preferably with mosaic symptoms, and collected from lettuce fields in the regions of Mogi v.38, n.3, p.245-247, 2012. das Cruzes, Campinas and Bauru, São Paulo State, Brazil, were analyzed for the presence of these viruses. LeMoV was the most frequently found virus, followed by LMV. The occurrence of BiMV in lettuce was extremely low and restricted to the regions of Campinas and Bauru, where it was also found in weeds such as Bidens pilosa and Galinsoga parviflora. The latter plant is the host of these three viruses.Additional keywords: LMV, LeMoV, BiMV. ABSTRACTA alface é infectada por diversos vírus que causam sintomas de mosaico, distorção foliar e necrose resultando em perda na qualidade do produto. Dentre esses vírus destacam-se o Lettuce mosaic virus, LMV pertencente ao gênero Potyvirus, considerado o mais importante na cultura (4), o Lettuce mottle virus, LeMoV possível membro do gênero Sequivirus e os vírus do gênero Tospovirus, causadores da doença conhecida como vira-cabeça. Além destes, o Bidens mosaic virus (BiMV), espécie tentativa no gênero Potyvirus, e o Cucumber mosaic virus (CMV, Cucumovirus) também infectam a alface (6).Dispondo de oligonucleotídeos sensíveis e específicos para o LMV, LeMoV e BiMV, todos causadores de sintomas de mosaico muito similares, o objetivo deste trabalho foi de avaliar a ocorrência do LMV, LeMoV e do BiMV, nos campos de produção de alface de três regiões do estado de São Paulo. v.38, n.3, p.245-247, 2012. coletadas em campos de produção de alface das regiões de Mogi das Cruzes, Campinas e Bauru no Estado de São Paulo e analisadas para a presença dos vírus. Verificou-se que o LeMoV foi o vírus encontrado com maior freqüência, seguido do LMV. A ocorrência de BiMV em alface foi extremamente baixa e restrita às regiões de Campinas e Bauru, onde também foi verificado em plantas invasoras como Bidens pilosa e Galinsoga parviflora. Esta ultima é hospedeira dos três vírus.

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Ocorrência generalizada do Lettuce mottle virus em três regiões produtoras de alface comercial do Estado de São Paulo

Cited by 2 publications

References 3 publications

Molecular and Biological Characterization of Novel and Known Family Secoviridae Members Infecting Lettuce

Molecular and Biological Characterization of Novel and Known Family Secoviridae Members Infecting Lettuce

Levantamento revela a predominância do Lettuce mottle virus em três regiões produtoras de alface no Estado de São Paulo

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