Plant viruses spread from cell to cell via plasmodesmata, which bridge the
rigid cell wall and connect adjacent cells. The spread of infection is aide
d by interactions between the virus and the host components. These interact
ions have been intensively studied to understand the crosstalk between path
ogen and host. The use of green fluorescent protein has shed new light an t
he close association between viral movement proteins and elements of the cy
toskeleton and the endomembrane system.