ArticleViruses2025
Investigating Apple Rubbery Wood Virus 2: HTS-Based Detection in Hungary and Involvement of sRNA-Based Regulation Processes During Its Infection.
Article in Viruses, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Pomme fruits are propagated vegetatively, thereby facilitating frequent viral transmission. The causative agent of apple rubbery wood disease, apple rubbery wood virus 2 (ARWV2), can infect apple and pear. The branches of ARWV2-infected, symptomatic trees are flexible due to the decreased lignification of the xylem. In this research, we reanalysed our small RNA (sRNA) HTS datasets to survey the presence of ARWV2 in Hungary. Validation of HTS using RT-PCR revealed infection in several cultivars. The following RT-PCR-based survey revealed the infection of 17 trees, including not only apple, but also pears, one quince, and a rootstock, without showing any rubbery wood symptoms. Analysis of the sRNA datasets allowed us to profile the sRNA pattern of ARWV2-infected and non-infected trees, and characterise the differential expression pattern of vsiRNAs, sRNAs, and miRNAs targeting the lignin biosynthetic pathway. The results confirmed that the gene-expression changes in the genes that regulate lignification cannot be directly correlated with the presence of the virus, which can explain its frequent latent presence. The variable titre and sequence of the virus, and mixed-infection status of the trees, make its reliable diagnostics challenging, which could be achieved as a result of further research.
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