Betaflexiviridae
| Betaflexiviridae | |
|---|---|
| Virus classification | |
| Group: |
Group IV ((+)ssRNA)
|
| Order: | |
| Family: |
Betaflexiviridae
|
| Genera | |
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Betaflexiviridae is a family of viruses in the order Tymovirales. Plants and fungi serve as natural hosts. There are currently 87 species in this family, divided among 7 genera. Diseases associated with this family include: mosaic and ringspot symptoms.[1][2]
Taxonomy
Group: ssRNA(+)
-
Family: Betaflexiviridae
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Genus: Carlavirus
- Aconitum latent virus
- American hop latent virus
- Blueberry scorch virus
- Butterbur mosaic virus
- Cactus virus 2
- Caper latent virus
- Carnation latent virus
- Chrysanthemum virus B
- Cole latent virus
- Coleus vein necrosis virus
- Cowpea mild mottle virus
- Cucumber vein-clearing virus
- Dandelion latent virus
- Daphne virus S
- Elderberry symptomless virus
- Garlic common latent virus
- Helenium virus S
- Helleborus mosaic virus
- Helleborus net necrosis virus
- Hippeastrum latent virus
- Honeysuckle latent virus
- Hop latent virus
- Hop mosaic virus
- Hydrangea chlorotic mottle virus
- Hydrangea latent virus
- Kalancho‰ latent virus
- Ligustrum necrotic ringspot virus
- Lilac mottle virus
- Lily symptomless virus
- Melon yellowing-associated virus
- Mirabilis jalapa mottle virus
- Mulberry latent virus
- Muskmelon vein necrosis virus
- Narcissus common latent virus
- Nerine latent virus
- Passiflora latent virus
- Pea streak virus
- Phlox virus B
- Phlox virus M
- Phlox virus S
- Poplar mosaic virus
- Potato latent virus
- Potato virus M
- Potato virus P
- Potato virus S
- Red clover vein mosaic virus
- Shallot latent virus
- Sint-Jan's onion latent virus
- Strawberry pseudo mild yellow edge virus
- Sweet potato C6 virus
- Sweet potato chlorotic fleck virus
- Verbena latent virus
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Genus: Tepovirus
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Structure
Viruses in Betaflexiviridae are non-enveloped, with flexuous and Filamentous geometries. The diameter is around 12-13 nm. Genomes are linear, around 6.5-9kb in length. The genome codes for 2 to 6 proteins.[1]
| Genus | Structure | Symmetry | Capsid | Genomic Arrangement | Genomic Segmentation |
|---|---|---|---|---|---|
| Carlavirus | Filamentous | Non-Enveloped | Linear | Monopartite | |
| Citrivirus | Filamentous | Non-Enveloped | Linear | Monopartite | |
| Capillovirus | Filamentous | Non-Enveloped | Linear | Monopartite | |
| Vitivirus | Filamentous | Non-Enveloped | Linear | Monopartite | |
| Foveavirus | Filamentous | Non-Enveloped | Linear | Monopartite | |
| Tepovirus | Filamentous | Non-Enveloped | Linear | Monopartite | |
| Trichovirus | Filamentous | Non-Enveloped | Linear | Monopartite |
Life Cycle
Viral replication is cytoplasmic, and is lysogenic. 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 tripartite non-tubule guided viral movement, and tubule-guided viral movement. Plants and fungi serve as the natural host. The virus is transmitted via a vector (insects). Transmission routes are vector and mechanical.[1]
| Genus | Host Details | Tissue Tropism | Entry Details | Release Details | Replication Site | Assembly Site | Transmission |
|---|---|---|---|---|---|---|---|
| Carlavirus | Plants | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Mechanical: insects |
| Citrivirus | Plants | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Unknown |
| Capillovirus | Pome fruits; citrus; pear | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Mechanical: seeds |
| Vitivirus | Plants | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Mechanical inoculation: pseudococcid mealybugs; Mechanical inoculation: aphids |
| Foveavirus | Plants | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Grafting |
| Tepovirus | Pome fruits; citrus; pear | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Grafting; propagating material |
| Trichovirus | Pome fruits; citrus; pear | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Grafting; propagating material |
