ABSTRACT
Terrestrial fungi can adopt different life strategies to exploit nutrient sources. They grow as saprotrophs on simple or complex organic substrates, or they can establish a nutritional relationship with higher plants, either as biotrophs or as necrotrophs. Mycorrhizal associations are the most important mutualistic biotrophic interactions (1). Over 80% of vascular flowering plants are capable of entering into symbiotic associations with arbuscular mycorrhizal (AM) fungi (2).
