Picornavirales

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Crystal structure of Grapevine fanleaf virus (click on image to enlarge it)
Source: Wikimedia Commons

Picornavirales:

The order of Picornavirales contains viruses which have a positive-sensed, single stranded RNA genome with only one open reading frame which encodes a polyprotein. The RNA-dependent RNA polymerases, capsid proteins and helicases of the members have similar structures.

The following families of plant viruses are included: