The hop stunt viroid (abbreviated HSVd, binomial name ''Hostuviroid impedihumuli'') is a
viroid
Viroids are small single-stranded, circular RNAs that are infectious pathogens. Unlike viruses, they have no protein coating. All known viroids are inhabitants of angiosperms (flowering plants), and most cause diseases, whose respective eco ...
species that infects the common
hop plant, citrus plants, grapevines, cucumber, and several ''
Prunus
''Prunus'' is a genus of flowering plant, flowering trees and shrubs from the family (biology), family Rosaceae. The genus includes plums, cherries, peaches, nectarines, apricots and almonds (collectively Drupe, stonefruit). The genus has a cosm ...
'' species such as almond, apricot, plum, and peach.
It is asymptomatic or latent in most host plants, but in some hosts it can cause stunting and other symptoms. A study of HSVd-infected hops in the USA showed that the severity of yield reduction was highly dependent on the infected hop cultivar.
HSVd is a member of the
Pospiviroidae family and the
Hostuviroid genus. There are various different sub-species of the hop stunt viroid.
Genome
The hop stunt viroid has a
single-stranded RNA
Ribonucleic acid (RNA) is a polymeric molecule that is essential for most biological functions, either by performing the function itself ( non-coding RNA) or by forming a template for the production of proteins ( messenger RNA). RNA and deoxy ...
genome; the genome is 297 nucleotides long.
Strains
All strains are from NCBI.
*
Citrus gummy bark viroid
*
Dapple peach fruit disease viroid
*
Dapple plum and peach fruit disease viroid
*
Grapevine viroid
*
Hop stunt viroid - citrus
*
Hop stunt viroid - cucumber
References
Viroids
Hop diseases
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