Luteoviridae

Luteoviridae is a family of viruses. Plants serve as natural hosts. There are currently 51 species in this family, divided among three genera, with seven unassigned species. Diseases associated with this family include: yellowing symptoms.[1][2]

Luteoviridae
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Tolucaviricetes
Order: Tolivirales
Family: Luteoviridae
Genera

Taxonomy

The following genera are recognized:

The following species are unassigned to a genus:

  • Barley yellow dwarf virus GPV
  • Barley yellow dwarf virus SGV
  • Chickenpea stunt disease associated virus
  • Groundnut rosette assistor virus
  • Indonesian soybean dwarf virus
  • Sweat potato leaf speckling virus
  • Tobacco necrotic dwarf virus

Structure

Viruses in Luteoviridae are non-enveloped, with icosahedral and Spherical geometries, and T=3 symmetry. The diameter is around 25-30 nm. Genomes are linear and non-segmented, around 5.3-5.7kb in length.[1] Luteoviruses can act as helper viruses for Umbraviruses, providing them with a coat protein.[2]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
LuteovirusIcosahedralT=3Non-envelopedLinearMonopartite
PolerovirusIcosahedralT=3Non-envelopedLinearMonopartite
UnassignedHead-TailT=16Non-envelopedLinearMonopartite
EnamovirusIcosahedralT=3Non-envelopedLinearMonopartite

Life cycle

Viral replication is cytoplasmic. 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. Translation takes place by leaky scanning, -1 ribosomal frameshifting, and suppression of termination. The virus exits the host cell by tubule-guided viral movement. Plants serve as the natural host. The virus is transmitted via a vector (insects). Transmission routes are vector and mechanical.[1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
LuteovirusPlantsPhloemViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: aphids
PolerovirusPlantsPhloemViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: aphids
UnassignedBacteriaNoneInjectionLysisCytoplasmCytoplasmPassive diffusion
EnamovirusPlantsPhloemViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: aphids

References
  1. "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015.
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