Closteroviridae

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Closteroviridae
Virus classification
Group: Group IV ((+)ssRNA)
Family: Closteroviridae
Genera

Closteroviridae is a family of viruses. Plants serve as natural hosts. There are currently 39 species in this family, divided among 4 genera. Diseases associated with this family include: yellowing and necrosis, particularly affecting the phloem.[1][2]

Taxonomy[edit]

Genome type and transmission vector are two of the most important traits used for classification. Ampeloviruses and Closteroviruses have monopartite genomes and are transmitted by pseudococcid mealybugs (and soft scale insects) and aphids respectively. While Criniviruses are bipartite and transmitted by whiteflies.

Group: ssRNA(+)

[2]

Structure[edit]

Viruses in Closteroviridae are non-enveloped, with flexuous and filamentous geometries. The diameter is around 10-13 nm, with a length of 950-2200 nm. Genomes are linear and non-segmented, bipartite, around 20kb in length. [1]

Genus Structure Symmetry Capsid Genomic Arrangement Genomic Segmentation
Crinivirus Filamentous Non-Enveloped Linear Monopartite
Velarivirus Filamentous Non-Enveloped Linear Monopartite
Closterovirus Filamentous Non-Enveloped Linear Monopartite
Ampelovirus Filamentous Non-Enveloped Linear Monopartite

Life Cycle[edit]

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. The virus exits the host cell by tubule-guided viral movement. Plants serve as the natural host. Transmission routes are mechanical.[1]

Genus Host Details Tissue Tropism Entry Details Release Details Replication Site Assembly Site Transmission
Crinivirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Mechanical inoculation: insects
Velarivirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Mechanical inoculation: insects
Closterovirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Mechanical inoculation: insects
Ampelovirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Mechanical inoculation: insects

References[edit]

  1. ^ a b c "Viral Zone". ExPASy. Retrieved 15 June 2015. 
  2. ^ a b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015. 

External links[edit]