Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of grapevine asteroid mosaic-associated virus infecting grapevines (Vitis vinifera) in Italy.

Abstract

In the summer of 2016, at total of 48 grapevine berry samples (24 V. vinifera 'Cannonau' and 24 V. vinifera 'Cabernet Sauvignon') were collected between veraison and harvest in Alghero, northwest Sardinian Island, Italy. RNAseq experiments revealed the presence of Grapevine asteroid mosaic-associated virus (GAMaV). Although the vineyard was composed of both Cannonau and Cabernet Sauvignon vines, only four samples from Cannonau showed the presence of the virus. Although conclusive data are not provided on a different susceptibility of the used grapevine genotypes, it is suggested that clone selection may have played a primary role. No detectable symptoms were observed in any of the infected vines, thus supporting the hypothesis that GAMaV may be largely latent or semilatent as previously reported. Analysis of the RNAseq experiments showed that the four infected plants were also coinfected by Grapevine fleck virus, Grapevine rupestris stem pitting-associated virus, Grapevine leafroll-associated virus 2, Grapevine yellow speckle viroid 1, and Grapevine Syrah virus 1. This is thought to be the first report GAMaV infecting grapevines in Italy.