Marafivirus

Marafivirus is a genus of viruses in the order Tymovirales, in the family Tymoviridae. Plants serve as natural hosts. There are 11 species in this genus.[1][2]

Marafivirus
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Alsuviricetes
Order: Tymovirales
Family: Tymoviridae
Genus: Marafivirus

Taxonomy

The genus contains the following species:[2]

  • Alfalfa virus F
  • Bermuda grass etched-line virus
  • Blackberry virus S
  • Citrus sudden death-associated virus
  • Grapevine asteroid mosaic associated virus
  • Grapevine Syrah virus 1
  • Maize rayado fino virus
  • Nectarine marafivirus M
  • Oat blue dwarf virus
  • Olive latent virus 3
  • Peach marafivirus D

Structure

Viruses in Marafivirus are non-enveloped, with icosahedral and isometric geometries, and T=3 symmetry. The diameter is around 30 nm. Genomes are linear, around 6-7kb in length.[1]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
MarafivirusIcosahedralT=3Non-envelopedLinearMonopartite

Life cycle

Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription is the method of transcription. The virus exits the host cell by monopartite non-tubule guided viral movement. Plants serve as the natural host. The virus is transmitted via a vector (leafhoppers). Transmission routes are vector and mechanical.[1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
MarafivirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: pseudococcid mealybugs; Mechanical inoculation: aphids

References
  1. "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 15 May 2021.
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