Cylindrical Inclusions in Coriander Leaf Cells Infected with Parsnip Mosaic Virus

Cytoplasmic inclusions (X-bodies) in coriander leaf cells infected with parsnip mosaic virus contained much endoplasmic reticulum and many Golgi bodies, together with cylindrical inclusions which, depending on the plane of sectioning appeared as bundles or pinwheels with attached laminated aggregates. The pinwheels differed from those associated with several other filamentous viruses because the radiating plates forming their arms were exceptionally long and flexuous. These plates were frequently attached to the plasmalemma or to elements of the endoplasmic reticulum. In its effects on cells, parsnip mosaic virus thus resembles other members of the potato virus Y group.