The competition between edible ectomycorrhizal fungi (EMF) and other ectomycorrhizal fungi have been studied in greenhouse and in the field taking into account different environmental conditions and using molecular tools as well as morphological methods. Approximately 100 ectomycorrhizal species were identified in soil fungal communities in productive areas of Boletus edulis sensu lato and in truffières of Tuber magnatum and Tuber borchii. The bacterial communities occurring in T. magnatum and T. borchii fruiting bodies during different stages of their maturation were also characterized. Alpha Proteobacteria, were found as major constituents of the bacterial community associated with truffle ascoma, independentely of the degree of maturation. These bacteria include members of the Sinorhizobium-Ensifer and Rhizobium-Agrobacterium groups, and Bradyrhizobium spp ., which are well known for their ability to fix atmospheric nitrogen. Our studies raise two important questions about truffle biology: 1) can the composition of microbial soil communities infuence EMF fruiting body production ? 2) can nitrogen fixing bacteria play a role in truffle nutrition ?
The microbial communities and fruiting of edible ectomycorrhizal mushrooms
BARBIERI, ELENA;AMICUCCI, ANTONELLA;STOCCHI, VILBERTO;
2009
Abstract
The competition between edible ectomycorrhizal fungi (EMF) and other ectomycorrhizal fungi have been studied in greenhouse and in the field taking into account different environmental conditions and using molecular tools as well as morphological methods. Approximately 100 ectomycorrhizal species were identified in soil fungal communities in productive areas of Boletus edulis sensu lato and in truffières of Tuber magnatum and Tuber borchii. The bacterial communities occurring in T. magnatum and T. borchii fruiting bodies during different stages of their maturation were also characterized. Alpha Proteobacteria, were found as major constituents of the bacterial community associated with truffle ascoma, independentely of the degree of maturation. These bacteria include members of the Sinorhizobium-Ensifer and Rhizobium-Agrobacterium groups, and Bradyrhizobium spp ., which are well known for their ability to fix atmospheric nitrogen. Our studies raise two important questions about truffle biology: 1) can the composition of microbial soil communities infuence EMF fruiting body production ? 2) can nitrogen fixing bacteria play a role in truffle nutrition ?I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
