Taxonomic status of viruses

Taxonomic status of viruses

According to 7th International Committee on Taxonomy of Viruses (ICTV), plant viruses were classified into total of 904 members or tentative members with 70 genera.

Aside from physical data, genome structure and mode of replication are criteria applied in the classification and nomenclature of viruses, including the chemical composition and configuration of the nucleic acid, whether the genome is monopartite or multipartite. The genomic RNA strand of single-stranded RNA viruses is called sense (positive sense, plus sense) in orientation if it can serve as mRNA, and antisense (negative sense, minus sense) if a complementary strand synthesized by a viral RNA transcriptase serves as mRNA. Also considered in viral classification is the site of capsid assembly and in enveloped viruses, the site of envelopment.

Taxonomy of some viruses

Name of Virus

Name of Group

Name of Family

Particle Morphology

Tobacco Mosaic Virus (TMV)

Tobamo Virus

Virgoviridae

Rod

Tomato Mosaic Virus (ToMV)

Tobra Virus

        _

Rod

Potato Yellow Mosaic Virus (PYMV)

Begomo /Gemini virus

Geminiviridae

Circular

Potato Leaf Roll Virus (PLRV)

Polaro virus

Luteoviridae

 

Isometric

Tomato Yellow Leaf Curl Virus (TYLCV)

Begomovirus

Geminiviridae

           -

Cotton Leaf Curl Virus (CLCuV)                              

Begomo /Gemini virus

Geminiviridae

Circular

Banana Bunchy Top Virus (BBTV)

Luteo virus

Luteoviridae

Isometric

 

 

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