Hostuviroid (genus)

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symptoms of Hop stunt viroid infection on hop plant (click on image to enlarge it)
Author(s): David Gent, USDA Agricultural Research Service
Source: IPM Images

Hostuviroid (genus)
The genus contains viroids similar to the Hop stunt viroid (HSVd). It is related to the genus Pospiviroid and like in that genus the members have a central conserved region (CCR) and lack the ability to self-cleave through hammerhead structures when the circular RNA molecules are formed.

The genus is defined by the nuleotide sequence in the CCR and members share at least 90% of that sequence with HSVd. The circular, single stranded RNA molecule contains 294-303 nucleotides.

The following species are currently entered under Hostuviroid (genus):