CARNA 5, the Small Cucumber Mosaic Virus—Dependent Replicating RNA, Regulates Disease Expression

Abstract
CARNA 5, the small cucummber mosaic virus—dependent replicating RNA which is the causal agent of lethal tomato necrosis disease, causes a drastic reduction of disease symptoms in at least two other plant species. Satellite-like RNA's associated with plant viruses have a disease-regulating function.