Viruses (2018) 10 (9 - 449)

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Aleksandra Obrepalska-Steplowska, Agnieszka Zmienko, Barbara Wrzesinska, Michal Goralski, Marek Figlerowicz, Joanna Zyprych-Walczak, Idzi Siatkowski and Henryk Pospieszny (2018)
The defense response of Nicotiana benthamiana to Peanut stunt virus infection in the presence of symptom exacerbating satellite RNA
Viruses 10 (9 - 449)
Abstract: Peanut stunt virus (PSV) is a widespread pathogen infecting legumes. The PSV strains are classified into four subgroups and some are defined by the association of satellite RNAs (satRNAs). In the case of PSV, the presence of satRNAs alters the symptoms of disease in infected plants. In this study, we elucidated the plant response to PSV-G strain, which occurs in natural conditions without satRNA. However, it was found that it might easily acquire satRNA, which exacerbated pathogenesis in Nicotiana benthamiana. To explain the mechanisms underlying PSV infection and symptoms exacerbation caused by satRNA, we carried out transcriptome profiling of N. benthamiana challenged by PSV-G and satRNA using species-specific microarrays. Co-infection of plants with PSV-G + satRNA increased the number of identified differentially expressed genes (DEGs) compared with the number identified in PSV-G-infected plants. In both treatments, the majority of up-regulated DEGs were engaged in translation, ribosome biogenesis, RNA metabolism, and response to stimuli, while the down-regulated DEGs were required for photosynthesis. The presence of satRNA in PSV-G-infected plants caused different trends in expression of DEGs associated with phosphorylation, ATP binding, and plasma membrane.
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Database assignments for author(s): Aleksandra Obrepalska-Steplowska, Henryk Pospieszny

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Peanut stunt virus