Potyviridae

The Potyviridae are a family of RNA viruses that provide more than 30 % of the known plant viruses. Some representatives have an agricultural economic importance as pathogens of crops.

Properties

Potyviridae possess an RNA genome of positive polarity, which is packaged in a rod-like ( filamentous ) capsid. Potyviridae generate in the host cell of a protein of about 70 kilodaltons cylindrical inclusion bodies, which are called pinwheels (English for, Windmill ' ).

System

The potyviruses are divided due to the homology of the capsid protein in eight genera, of which only Bymoviren possess a double-stranded genome:

• Genus Brambyvirus, such as Blackberry virus Y ( BVY )
• Genus Bymovirus, such as Barley yellow mosaic virus ( BaYMV )
• Genus Ipomovirus, such as Sweet potato mild mottle virus ( SPMMV )
• Genus Macluravirus, such as Maclura mosaic virus ( MacMV )
• Genus Poacevirus, eg Triticum mosaic virus ( TriMV )
• Genus potyvirus, such as Potato virus Y ( PVY )
• Genus Rymovirus, such as ryegrass mosaic virus ( RGMV )
• Genus Tritimovirus, eg Wheat streak mosaic virus ( WSMV ​​)

The largest group of Potyviridae are the potyviruses, with more than 100 representatives. Potyviruses are transmitted naturally through Aphididae ( aphids tube ) and have a length of 720-850 nm 650-675 nm Macluraviren are long and are also transmitted through Aphididae. The plant viruses are transmitted by the Ipomoviren whiteflies and are 750-950 nm long. Tritimoviren and Rymoviren are 680-750 nm long and are transmitted by cotton grass mites. Rymoviren are closely related to the potyvirus. Bymoviren produce virions of two different sizes, and are transmitted through Polymyxa graminis.