TABLE 1.

Schematic comparison of the interaction at different levels between R. solanacearum and a susceptible tomato, S. dulcamara, and a resistant tomato.

	Susceptible tomato	S. dulcamara	Resistant tomato
Disease symptoms	+++	++	±
Bacterial levels in roots	+++	++	+
Bacterial levels in stems	+++	++	+
Bacterial vertical spread	+++	++	+
Bacterial horizontal spread	+++	++	+
Symptoms at lower temp.	++	±	NT
Structural reinforcements	±	++	+++

±: few or inexistent; +: low levels; ++: intermediate levels; +++: high levels; NT: not tested.