Carlavirus in Senna macranthera
A Carlavirus has been found associated with Senna macranthera showing reduced development,
foliar mosaic and necrotic spots, and pod necrosis.
The virus could be mechanically transmitted from
infected leaves and pods, but it is not seed borne,
showing restricted host range. In negatively stained
preparations, electron microscopic observations revealed
flexuous, elongated particles with one of their
ends rounded, measuring ca. 640 nm; in the thin sections,
foliar mesophyll cells contained particles
aggregates in cytoplasm. The “in vitro” properties and
the presence of only one protein capsid with 30 KDa
are correspondent those reported for Carlavirus. The
data obtained so far suggest that this isolate is Cassia
mild mosaic virus, a virus widespread in the urban
ornamental areas planted with Cassiaspecies in
Brazilian cities.