Nepovirus ribis
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Authors: Moročko-Bičevska et al.
Source: Annals of Applied Biology (2022), vol. 180, p. 28
Nepovirus ribis
Assigned virus:
• blackcurrant reversion virus (BRV)
This blackcurrant reversion virus belongs to subgroup C of nepoviruses and causes the blackcurrant reversion disease, which is economically important and can be destructive on cultivated currant. The reversion disease of currant plants has been known from Europe since 1904 and the virus was first described in 1997 from blackcurrant bushes grown in Finland from Scottish breeding lines (Lemmetty et al., 1997). The virus has also reached New Zealand and North America with germplasm introduced from Europe (e.g. Zurn et. al., 2019).
The disease is characterized by the appearance of narrow leaves, with a decreased number of main veins, larger but fewer marginal serrations, yellow line patterns on the leaves and an abundance of malformed flowers. Mild forms of the virus also exist which do not cause visible symptoms.
BRV is believed to be transmitted mainly by the blackcurrant gall mite (Cecidophyopsis ribis). However, other species of Cecidophyopsis live on currant plants and might be vectors. The virus has spherical particles, 27 nm in diameter and a genome of 2 single‐stranded RNA molecules with around 7700 nt (RNA1) and 6400 nt (RNA2).
For a review see Morocko-Bicevska et al. (2022).
