Potyviridae: Difference between revisions

From MicrobeWiki, the student-edited microbiology resource
No edit summary
No edit summary
Line 7: Line 7:
===Genera===
===Genera===


''Bymovirus'', ''Ipomovirus'', ''Macluravirus'', ''[[Potyvirus]]'', ''Rymovirus'', ''Tritimovirus''
''[[Potyvirus]]'', ''Bymovirus'', ''Ipomovirus'', ''Macluravirus'', ''Rymovirus'', ''Tritimovirus''


==Description and Significance==
==Description and Significance==
Line 15: Line 15:
==Genome Structure==
==Genome Structure==


 
The Potyviridae genome consist of either one molecule or two segments of linear positive-sense single stranded RNA.  The complete genome is 8500-10000 nucleotides in length.  The 3'-terminus has a poly (A) tract.  The 5'-terminus has a genome-linked protein (VPg). (source: [http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/index.htm ICTVdB])


==Virion Structure of a Potyvirus==
==Virion Structure of a Potyvirus==


 
Potyviridae virions consist of a non-enveloped capsid.  The capsid is elongated, filamentous, and exhibits helical symmetry.  The size of virions in the family vary, but are either 680-900nm, 500-600nm, or 200-300nm in length.  Virions have a width of 12-15nm.  (source:  [http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/index.htm ICTVdB])


==Reproduction Cycle of a Potyvirus in a Host Cell==
==Reproduction Cycle of a Potyvirus in a Host Cell==
Line 27: Line 27:
==Viral Ecology & Pathology==
==Viral Ecology & Pathology==


 
Potyviruses infect plants, causing severe economic damage to crops worldwide.  The genera are defined by their transmission vector: ''[[Potyvirus|Potyviruses]]'' and ''Macluraviruses'' are aphid-borne; ''Bymoviruses'' are transmitted by plasmodiphorids; ''Rymoviruses'' and ''Tritimoviruses'' are transmitted by mites; and ''Ipomoviruses'' are transmitted by whiteflies.


==References==
==References==
[http://www.ccma.csic.es/dpts/prot/afereres/aphid%20attraction%20to%20infected%20plants.pdf Fereres et al.  "Aphid Attraction and Preference for Soybean and Pepper Plants Infected with Potyviridae."  ''Annals of the Entomological Society of America'' 92.4 (1999): 542-548.]
Götz et al.  "Molecular analyses of the coat protein region of different viruses on Poaceae belonging to the Potyviridae."  ''Agronomie'' 15.7-8 (1995): 491-494.
[http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/index.htm ICTVdB - The Universal Virus Database, version 4. http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/]
Janssen et al.  "Absence of a coding region for the helper component-proteinase in the genome of cucumber vein yellowing virus, a whitefly-transmitted member of the Potyviridae."  '' Archives of Virology'' 150.7 (2005): 1439-1447.

Revision as of 16:11, 5 July 2006

Baltimore Classification

Higher order taxa

Virus; ssRNA positive-strand viruses, no DNA stage; Potyviridae

Genera

Potyvirus, Bymovirus, Ipomovirus, Macluravirus, Rymovirus, Tritimovirus

Description and Significance

Genome Structure

The Potyviridae genome consist of either one molecule or two segments of linear positive-sense single stranded RNA. The complete genome is 8500-10000 nucleotides in length. The 3'-terminus has a poly (A) tract. The 5'-terminus has a genome-linked protein (VPg). (source: ICTVdB)

Virion Structure of a Potyvirus

Potyviridae virions consist of a non-enveloped capsid. The capsid is elongated, filamentous, and exhibits helical symmetry. The size of virions in the family vary, but are either 680-900nm, 500-600nm, or 200-300nm in length. Virions have a width of 12-15nm. (source: ICTVdB)

Reproduction Cycle of a Potyvirus in a Host Cell

Viral Ecology & Pathology

Potyviruses infect plants, causing severe economic damage to crops worldwide. The genera are defined by their transmission vector: Potyviruses and Macluraviruses are aphid-borne; Bymoviruses are transmitted by plasmodiphorids; Rymoviruses and Tritimoviruses are transmitted by mites; and Ipomoviruses are transmitted by whiteflies.

References

Fereres et al. "Aphid Attraction and Preference for Soybean and Pepper Plants Infected with Potyviridae." Annals of the Entomological Society of America 92.4 (1999): 542-548.

Götz et al. "Molecular analyses of the coat protein region of different viruses on Poaceae belonging to the Potyviridae." Agronomie 15.7-8 (1995): 491-494.

ICTVdB - The Universal Virus Database, version 4. http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/

Janssen et al. "Absence of a coding region for the helper component-proteinase in the genome of cucumber vein yellowing virus, a whitefly-transmitted member of the Potyviridae." Archives of Virology 150.7 (2005): 1439-1447.