Endophyte and saprobe fungi are considered the most important among rhizospheric fungi by their biofertilization and/or biodegradation abilities. Among endophyte fungi, arbuscular mycorrhiza fungi are considered the most important because their effect on plant growth by the formation of the mutualistic mycorrhizal symbiosis. Besides, the use of other fungal endophytes with biofertilization and biodegradation abilities such as dark septate fungi, ericoids fungi and some saprobe fungi allow us a more extended study on biofertilization and biodegradation processes carried out by fungi in the rhizosphere and open more expectatives of practical application of this fungal research.
The use of the different fungal endophytes together with new plant cultures (including those with potentiality to obtain biodiesel), in presence of agro-industrial residues, will allow us to manage their biofertilizer and biodegradative abilities. Moreover, the possible sinergistic and antagonic interactions between these fungi and other rizosphere inhabitants, such as symbiotic bacteria of the genus Rhizobium and plant root endophytes such as Orobanche and Striga, and their common processes of root colonization and signaling and in their interactions with crop plants are also studied.