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00.069.0.01. Tenuivirus
Cite this publication as: ICTVdB Management (2006).
00.069.0.01. Tenuivirus. In: ICTVdB - The Universal Virus Database,
version 4. Büchen-Osmond, C. (Ed), Columbia University, New York, USA
Cite this site as: ICTVdB - The Universal Virus Database, version 4.
http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/
This is a description of a
plant virus at the genus level (not yet assigned to
a family).
ICTVdB Virus Code: 00.069.0.01. Virus accession number:
069001GE. Obsolete virus code: 69.0.1.; superceded accession number: 69010000.
NCBI Taxon Identifier NCBI Taxonomy ID:
12329.
Name, Synonyms and Lineage
Synonym(s): Rice
stripe virus group. Virus is not assigned to a family.
Virions consist of a nucleocapsid. Virus capsid is not
enveloped. Capsid/nucleocapsid is elongated with helical
symmetry. Virus preparations contain more than one particle component. The
nucleocapsid is filamentous, flexuous, or spiral, or
branched, or circular, or tightly coiled; and segments have a length
proportional to the size of their RNA and a width of 3-10 nm. Axial canal is
distinct, or indistinct. Basic helix is obvious. The nucleocapsid is segmented.
Electron microscopic preparation and references: Virus preparation
contains few virions, or many virions.
Virions have a buoyant density in CsCl of
1.28-1.283-1.288 g cm-3. There are 1 sedimenting
component(s) found in purified preparations, or 2 sedimenting component(s) found
in purified preparations, or 3 sedimenting component(s) found in purified
preparations, or 4 sedimenting component(s) found in purified preparations. The
sedimentation coefficient is 87-137.5-187 S20w; of
the other(s) are 68-74-80 S20w. Isoelectric point pH
is 4.5. The thermal inactivation point (TIP) is at 50-52.5-55°C.
The longevity in vitro (LIV) is 0.5 days. Although the titer is dependent
on the host, the decimal exponent (DEX) of the dilution end point is usually
around 2-4.
The Mr
of the genome constitutes 5.2-9.733-12% of the virion by weight. The
genome is segmented and consists of four segments of, or five segments of
linear, negative-sense and ambisense, usually
single-stranded RNA. The complete genome is
15460-17210-18600 nucleotides long. RNA-1 is fully sequenced,
complete sequence is 4390-8077-9800 nucleotides long. RNA-2 is
sequenced, complete sequence is about
3500-3630-3940 nucleotides long. RNA-3 is sequenced and complete
sequence is about 2300-2700-3640
nucleotides long. RNA-4 has been sequenced, but only an estimate is provided,
complete sequence is 1990-2462-3490 nucleotides long . RNA-5 has been
sequenced, but only an estimate is presented, complete sequence is 1300
nucleotides long (in maize stripe virus). The genome has a base ratio of 18.1 %
guanine; 26.3 % adenine; 17.8 % cytosine; 37.8 % uracil. The multipartite genome
is divided among more than one type of particle and the segments are
distributed between 4 different types of particles.
GenBank records for
nucleotide sequences;
complete genome sequences.
Proteins
constitute about 88-91.4-94.8% of the particle weight.
The viral genome encodes structural proteins and non-structural proteins.
Virions consist of 1 structural protein(s), or 2 structural protein(s).
Non-Structural Proteins: Virus-coded non-structural
proteins have been isolated and 1 non-structural protein(s)
are found.
Lipids are not
reported.
Genome Organization and Replication
Natural Host
Domain
Viral hosts belong to the Domain
Eucarya.
Domain Eucarya
Kingdom Plantae.
Kingdom Plantae
Phylum Magnoliophyta
(Angiosperms, Class Liliopsida (Monocotyledonae).
Severity and Occurrence of
Disease
Host: Signs and symptoms persist, or
vary cyclically over a few weeks.
Virus is transmitted by a vector. Virus is transmitted by
mechanical inoculation, or not transmitted by mechanical inoculation; not
transmitted by contact between hosts; not transmitted by seeds; not transmitted
by pollen.
Vector Transmission:
Virus is transmitted by arthropods, by insects
of the order Hemiptera, family Cicadellidae, Delphacidae. Virus is
transmitted in a persistent manner; retained when the vector moults; replicates
in the vector; transmitted congenitally to the progeny of the vector, or not
transmitted congenitally to the progeny of the vector.
Experimental Hosts and Symptoms
Under
experimental conditions susceptibility to infection by virus is found in few
families. Susceptible host species are found in the Family Cyperaceae,
Gramineae, Pontederiaceae. The following species were
susceptible to experimental virus infection: Avena sativa, Cynodon
dactylon, Cyperus rotundus, Dactylis glomerata,
Digitaria, Digitaria adscendens, Digitaria
violascens, Echinochloa colona, Eragrostis multiflorum,
Hordeum vulgare, Leersia hexandra, Leptochloa,
Lolium multiflorum, Lolium perenne, Monochoria
vaginalis, Oryza punctata, Oryza sativa, Oryza
sativa var. japonica, Phleum, Phleum pratense,
Rottboellia exaltata, Secale cereale, Setaria
italica, Setaria viridis, Sorghum bicolor, Sorghum
vulgare, Triticum aestivum, Zea mays.
Experimentally infected insusceptible Hosts: Families
containing insusceptible hosts: Gramineae. Species inoculated with virus that do
not show signs of susceptibility: Anthoxanthum odoratum, Avena
sativa, Chloris gayana, Dactylis glomerata,
Echinochloa crus-galli, Eleusine coracana, Elymus
tsukushiensis var. transiens, Festuca arundinacea,
Festuca pratensis, Festuca rubra, Lolium multiflorum,
Oryza sativa, Phalaris arundinacea, Poa pratensis,
Saccharum officinarum, Triticum aestivum.
Histopathology: Virions are found in the cytoplasm, or nucleus.
Cytopathology: Inclusions are present in infected cells.
Inclusion bodies in the host cell are found in the cytoplasm and nucleus.
Nuclear inclusion bodies are crystals. Cytoplasmic inclusions are crystals, or
amorphous X-bodies. Inclusions contain mature virions, or do not contain
mature virions.
The virus spreads in East Asia, or South and Central
Americas. The virus occurs in Australia, or Botswana, or China, or Colombia, or
Costa Rica, or Cuba, or Czechoslovakia (former), or Denmark, or the Dominican
Republic, or Ecuador, or Egypt, or El Salvador, or Finland, or Germany, or
Guadeloupe, or Honduras, or India, or Indonesia, or Japan, or Kenya, or
Malaysia, or Mauritius, or Nicaragua, or Nigeria, or Panama, or Peru, or the
Philippines, or Poland, or Reunion, or Romania, or Sao Tome and Principe, or
Spain, or Sri Lanka, or Sweden, or Taiwan, or Thailand, or the United Kingdom,
or the United States of America, or the USSR (former), or Venezuela.
Type species 00.069.0.01.001.
Rice stripe virus .
List of Species in the
Genus.
Tentative Species in the
Genus.
Data Sources and
Contributions
The
following generic references are cited in the most recent ICTV Report.
PubMed References.
Taxon images: • em_tenui.gif. • EM from IACR Rothamsted.
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