Betaflexiviridae

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Betaflexiviridae
Virus classification
Group: Group IV ((+)ssRNA)
Order: Tymovirales
Family: Betaflexiviridae
Genera

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[edit]

Group: ssRNA(+)

[2]

Structure[edit]

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[edit]

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

References[edit]

  1. ^ a b c "Viral Zone". ExPASy. Retrieved 12 June 2015. 
  2. ^ a b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 12 June 2015. 

External Links[edit]