Marafivirus


Marafivirus is a genus of viruses in the order Tymovirales, in the family Tymoviridae. Plants serve as natural hosts. There are 12 species in this genus.

Taxonomy

The genus contains the following species, listed by scientific name and followed by the exemplar virus of the species:Marafivirus asteroides, Grapevine asteroid mosaic associated virusMarafivirus avenae, Oat blue dwarf virusMarafivirus citri, Citrus sudden death-associated virusMarafivirus cynodonis, Bermuda grass etched-line virusMarafivirus maydis, Maize rayado fino virusMarafivirus medicagonis, Alfalfa virus FMarafivirus nucipersicae, Nectarine marafivirus MMarafivirus oleae, Olive latent virus 3Marafivirus pruni, Peach marafivirus DMarafivirus rubi, Blackberry virus SMarafivirus sorghi, Sorghum almum marafivirusMarafivirus syrahense, Grapevine Syrah virus 1

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.
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. Transmission routes are vector and mechanical.
GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
MarafivirusPlants-Viral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: pseudococcid mealybugs; Mechanical inoculation: aphids