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.