Tombusvirus

Tombusvirus is a genus of positive-sense single-stranded RNA viruses in the family Tombusviridae. These viruses are known to infect plants, particularly dicotyledonous species. The name "Tombusvirus" is derived from "tomato bushy stunt virus," which is a type of tombusi virus and the type species of the genus.

Tombusviruses have a characteristic icosahedral capsid that encases their RNA genome. The genome typically consists of a single RNA molecule, which is approximately 4-5 kilobases in length. This RNA encodes several proteins, including a replicase protein essential for viral RNA replication, a movement protein that facilitates spread within the plant, and coat proteins that form the viral capsid.

These viruses are often transmitted by mechanical means or through vectors such as fungi. They can cause a range of symptoms in infected plants, including stunting, leaf curling, mosaic patterns, and necrotic lesions, depending on the specific virus species and host plant. Their economic impact can be significant in agriculture due to damage to crops. Research into tombusi viruses is important for understanding plant-pathogen interactions and developing strategies for disease management.