Identification of Physalis angulata (Solanaceae) as a natural alternative weed host of Tomato severe rugose virus in Brazil.
In 2016, about 10% of the plants of the weed Physalis angulata were observed with begomovirus-like symptoms (apical chlorosis and stunting) around and within tomato fields in Venda Nova do Imigrante, Espirito Santo, Brazil. Leaf tissue was collected from 10 symptomatic and five healthy-looking plants, respectively. BLASTn analyses of the amplicon sequences indicated high nucleotide identities (99 and 98%) with DNA-A and DNA-B of Tomato severe rugose virus (ToSRV) isolates (accession numbers JX415196 and MG837739) from Brazil, suggesting the infection of ToSRV in these plants. This is the thought to be first report of natural infection of P. angulata by ToSRV, expanding the viral host range to this widespread tropical and subtropical weed.