Abstract
A virus isolated from severely diseased wild plants ofDatura stramonium in Hungary was identified as a strain of henbane mosaic potyvirus (HeMV) by its host range, vector transmissibility, electron microscopy and serology. This W/H isolate of HeMV induced necrotic local lesions onChenopodium quinoa and characteristic systemic symptoms in species ofDatura, Nicotiana andPhysalis but it was apathogenic to species ofCapsicum, Cucumis andPhaseolus. The virus is transmissible by aphids,Myzus persicae, in a non-persistent manner. Electron microscopy showed that it consisted of flexuous filaments, c. 180×12 nm. In plants ofDatura andNicotiana spontaneously infected by and artificially inoculated with HeMV-W/H, pinwheel structures typical of the potyvirus group were found. Serological examinations confirmed the identity of HeMV-W/H with the standard strain of the virus, HeMV-R. Plants of the potato cultivars Desiree and Gracia, graft-inoculated with HeMV-W/H, were latently infected. Inoculated plants of wildSolanum species responded to the virus with systemic symptoms.
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