Transmission of alfalfa mosaic virus through Nicandra physaloides seeds and its localization in embryo cotyledons.

Alfalfa mosaic virus (AMV) was found to be transmitted through seeds of Nicandra physaloids L. The average seed transmission rate of the AMV isolates T6, LMBG-4 and ST amounted to 23, 4 and 0 per cent, repectively. In the cytoplasm of parenchyma cells of embryo cotyledons of seeds from plants infected with the T6 isolate, electron microscopy revealed AMV aggregates of type 2A and aggregations of irregularly viral particles with a tendency to subparallel alignment, representing early stages of type 2A aggregates.