''Tenuivirus'' is a

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 ...

genus belonging to ''

Phenuiviridae ''Phenuiviridae'' is a family of negative-strand RNA viruses in the order ''Bunyavirales''. Ruminants, camels, humans, and mosquitoes serve as natural hosts. Member genus ''Phlebovirus'' is the only genus of the family that has viruses that cause ...

'' family in the order ''

Bunyavirales ''Bunyavirales'' is an order of segmented negative-strand RNA viruses with mainly tripartite genomes. Member viruses infect arthropods, plants, protozoans, and vertebrates. It is the only order in the class ''Ellioviricetes''. The name ''Bunyavir ...

''. These plant viruses cause diseases in their host plants. Typical symptoms are chlorotic stripes on the affected leaves. This group of viruses make viral inclusions in infected cells which can be used to diagnose infection.

Virology

The virion particle consists of non-enveloped

nucleocapsid A capsid is the protein shell of a virus, enclosing its genetic material. It consists of several oligomeric (repeating) structural subunits made of protein called protomers. The observable 3-dimensional morphological subunits, which may or may ...

s that exhibit helical symmetry, forming thin, filamentous structures between 500–2100 nm long. The genomes are segmented and consist of four to six strands of negative-sense single-stranded RNA and the N-protein. These viruses are transmitted by an

arthropod Arthropods (, (gen. ποδός)) are invertebrate animals with an exoskeleton, a Segmentation (biology), segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They are distinguished by their jointed limbs and Arth ...

vectors in the families Cicadellidae or

Delphacidae Delphacidae is a family of planthoppers containing about 2000 species, distributed worldwide. Delphacids are separated from other "hoppers" by the prominent spur on the tibia of the hindleg. Diet and Pest species All species are phytophagous, ...

. ''Tenuivirus'' genome is segmented and has an ambisense coding strategy.

Diseases

Maize stripe disease, thought to be caused by

Maize stripe virus ''Maize stripe tenuivirus'' (MSpV) is a pathogenic 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 wit ...

, is a disease of

Maize Maize ( ; ''Zea mays'' subsp. ''mays'', from es, maíz after tnq, mahiz), also known as corn (North American and Australian English), is a cereal grain first domesticated by indigenous peoples in southern Mexico about 10,000 years ago. Th ...

that is characterized by leaf

blight Blight refers to a specific symptom affecting plants in response to infection by a pathogenic organism. Description Blight is a rapid and complete chlorosis, browning, then death of plant tissues such as leaves, branches, twigs, or floral organ ...

and stunting of the plant. Rice stripe virus and

Rice hoja blanca virus ''Rice hoja blanca tenuivirus'' (RHBV), meaning "white leaf rice virus", is a plant virus in the family ''Phenuiviridae.'' RHBV causes Hoja blanca disease (HBD), which affects the leaves of the rice plant ''Oryza sativa'', stunting the growth of th ...

has been shown to cause Rice stripe disease and Rice hoja blanca disease respectively, resulting in leaf blight and death of rice plants. Rice grassy stunt disease is caused by Rice grassy stunt virus which results in stunting of rice plants and an excessive

tiller A tiller or till is a lever used to steer a vehicle. The mechanism is primarily used in watercraft, where it is attached to an outboard motor, rudder post or stock to provide leverage in the form of torque for the helmsman to turn the rudder. ...

Taxonomy

''Tenuivirus'' has close phylogenic relationship with members of the genus ''

Tospovirus ''Orthotospovirus'' is a genus of negative-strand RNA viruses, in the family ''Tospoviridae'' of the order ''Bunyavirales,'' which infects plants. Tospoviruses take their name from the species '' Tomato spotted wilt orthotospovirus'' (TSWV) which ...

'', the virions of which are bounded with an

envelope An envelope is a common packaging item, usually made of thin, flat material. It is designed to contain a flat object, such as a letter or card. Traditional envelopes are made from sheets of paper cut to one of three shapes: a rhombus, a shor ...

. ''Tenuivirus'' encodes a

membrane A membrane is a selective barrier; it allows some things to pass through but stops others. Such things may be molecules, ions, or other small particles. Membranes can be generally classified into synthetic membranes and biological membranes. B ...

protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respo ...

precursor that is homologue to the virion envelope protein of ''Tospoviridae'', although no envelope was found to associate with ''Tenuivirus'' virion. The genus contains the following species: *'' Echinochloa hoja blanca tenuivirus'' *'' European wheat striate mosaic tenuivirus'' *'' Iranian wheat stripe tenuivirus'' *'' Maize stripe tenuivirus'' *'' Melon tenuivirus'' *'' Rice grassy stunt tenuivirus'' *''

Rice hoja blanca tenuivirus ''Rice hoja blanca tenuivirus'' (RHBV), meaning "white leaf rice virus", is a plant virus in the family ''Phenuiviridae.'' RHBV causes Hoja blanca disease (HBD), which affects the leaves of the rice plant ''Oryza sativa'', stunting the growth of th ...

'' *'' Rice stripe tenuivirus'' *'' Urochloa hoja blanca tenuivirus''

References

External links

ICTVdB—The Universal Virus Database, version 3.

{{Taxonbar, from=Q7700933 Tenuiviruses Viral plant pathogens and diseases Virus genera