1. Department of Applied Biology-Microbiology; University of Perugia; Borgo XX Giugno 74 I-06121 Perugia Italy
2. Consiglio per la Ricerca e la sperimentazione in Agricoltura (CRA-RPS, Research Centre for the Soil-Plant System); Via della Navicella 2 I-00184 Roma Italy
3. Department of Experimental Medicine and Biochemical Sciences; University of Perugia; Via del Giochetto I-06126 Perugia Italy
4. Department of Chemistry and Technology of Drugs; University of Perugia; Via del Liceo 1 I-06123 Perugia Italy