Tungrovirus

Tungrovirus is a genus of viruses in the family Rhabdoviridae, order Mononegavirales. Plants serve as natural hosts. There are currently two species in this genus including the type species Rice tungro bacilliform virus. Diseases associated with this genus include: RTBV: stunting, yellow-orange leaf discoloration.

Taxonomy

The following two species are assigned to the genus:

• Rice tungro bacilliform virus
• Maize Iranian mosaic virus

Structure

Tungroviruses are non-enveloped, with bacilliform geometries. The diameter is around 60-70 nm. Genomes are linear, around 8kb in length.

Life Cycle

Viral replication is cytoplasmic. Entry into the host cell is achieved by attachment of the viral G glycoproteins to host receptors, which mediates endocytosis. Replication follows the negative stranded RNA virus replication model. Negative stranded RNA virus transcription, using polymerase stuttering 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, seed borne, and contact.

External links

• ICTVdB - The Universal Virus Database: Tungrovirus
• ICTVdB - The Universal Virus Database: Rice tungro bacilliform virus
• ICTVdB - The Universal Virus Database: Maize Iranian mosaic virus

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