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<p><i>Artemisia argyi</i> is a significant medicinal plant in China. To date, no viruses have been reported to infect <i>A. argyi</i>. In this study, using the RNA-seq technique, we identified a novel marafivirus in <i>A. argyi</i> plants showing leaf mottle and albinism symptoms, which we have tentatively named “Artemisia argyi albinism-associated virus” (AAAaV). The AAAaV genome is a positive-sense single-stranded RNA with a length of 6749 nt, excluding the poly(A) tail, containing a single open reading frame (ORF) encoding a large polyprotein. Phylogenetic analysis based on the full-length genome and polyprotein amino acid sequences revealed that AAAaV is related to members of the genus <i>Marafivirus</i> of the family <i>Tymoviridae</i>. The polyprotein of AAAaV shares 33.68-38.14% amino acid sequence identity with those of 12 closely related marafiviruses and contains five conserved domains that are characteristic of members of this genus. This discovery expands our knowledge of marafivirus diversity, host range, and viruses capable of infecting <i>A. argyi</i>.</p>

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Discovery and characterization of a novel marafivirus from Artemisia argyi plants

  • 期刊论文

  • 发表日期：

    2026年1月26日

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  • Liyan Li,
  • Lele Chen,
  • Yaqin Wang,
  • Li Xie,
  • Shuai Fu,
  • Jianxiang Wu

摘要

Artemisia argyi is a significant medicinal plant in China. To date, no viruses have been reported to infect A. argyi. In this study, using the RNA-seq technique, we identified a novel marafivirus in A. argyi plants showing leaf mottle and albinism symptoms, which we have tentatively named “Artemisia argyi albinism-associated virus” (AAAaV). The AAAaV genome is a positive-sense single-stranded RNA with a length of 6749 nt, excluding the poly(A) tail, containing a single open reading frame (ORF) encoding a large polyprotein. Phylogenetic analysis based on the full-length genome and polyprotein amino acid sequences revealed that AAAaV is related to members of the genus Marafivirus of the family Tymoviridae. The polyprotein of AAAaV shares 33.68-38.14% amino acid sequence identity with those of 12 closely related marafiviruses and contains five conserved domains that are characteristic of members of this genus. This discovery expands our knowledge of marafivirus diversity, host range, and viruses capable of infecting A. argyi.