''Varicosavirus'' is a genus of

plant virus Plant viruses are viruses that affect plants. Like all other viruses, plant viruses are obligate intracellular parasites that do not have the molecular machinery to replicate without a host. Plant viruses can be pathogenic to higher plants. M ...

es. The virus is associated with swelling in plant vein tissues. They are negative single stranded

RNA Ribonucleic acid (RNA) is a polymeric molecule essential in various biological roles in coding, decoding, regulation and expression of genes. RNA and deoxyribonucleic acid ( DNA) are nucleic acids. Along with lipids, proteins, and carbohydra ...

viruses. The genus contains three species.

Taxonomy

The genus contains the following species: *'' Alopecurus varicosavirus'' *'' Lettuce big-vein associated varicosavirus'' *'' Trifolium varicosavirus''

Structure

Virions consist of a non-enveloped rod-shaped capsid, having a

helical Helical may refer to: * Helix, the mathematical concept for the shape * Helical engine, a proposed spacecraft propulsion drive * Helical spring, a coilspring * Helical plc, a British property company, once a maker of steel bar stock * Helicoil A t ...

symmetry of 120–360 nm in length, and a width of 18–30 nm.

Genome

The

genome In the fields of molecular biology and genetics, a genome is all the genetic information of an organism. It consists of nucleotide sequences of DNA (or RNA in RNA viruses). The nuclear genome includes protein-coding genes and non-coding ge ...

consists of a bi-segmented linear, single-stranded negative sense

. The first segment is about 6350–7000

nucleotides Nucleotides are organic molecules consisting of a nucleoside and a phosphate. They serve as monomeric units of the nucleic acid polymers – deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), both of which are essential biomolecules w ...

in length; the second, about 5630–6500 nucleotides in length.

References

External links

Viralzone: ''Varicosavirus''
Varicosaviruses Virus genera {{Virus-stub