The cellular events that accompany the infection of tomato lines resistant and susceptible to TYLCV are described.

We describe cellular morphological changes that occur as a result of TYLCV infection include.

Epidermal cell sizes decrease accompanied with changes in cell shapes in susceptible line.

Reduction in plastid numbers, plastid sizes and chlorophyll content after infection in susceptible line.

An increase in plasmodesmata number after infection in susceptible line is accompanied with reduced expression of chloroplast proteins.