Two grapevine viruses in an ornamental Vitis species from Scotland.

ABSTRACT: Two plants of Vitis coignetiae (Crimson Glory vine), an ornamental species, were observed in mid-September 2004 in the gardens of Falkland Palace at Falkland, Fife, Scotland. One of the vines grew vigorously and had uniformly green foliage, whereas the other was stunted and had smaller leaves with a strong reddish colouration of the interveinal tissues, but leaving a narrow green band along the primary and secondary veins. These symptoms resembled those of leafroll disease in red-berried V. vinifera cultivars. RT-PCR identified the presence of grapevine virus A and grapevine leafroll-associated virus 1 from leaves and canes of symptomatic plants.