Infection capacities in the orange-pathogen relationship: Compatible (Penicillium digitatum) and incompatible (Penicillium expansum) interactions

► Maturity stage is an important factor in the resistance of oranges to P. digitatum. ► An incompatible interaction can become compatible under favourable conditions. ► P. expansum can infect oranges under favourable conditions. ► Lignin may play an important role in orange defence against P. expansum.