1. Dpto. de Investigación
Agroambiental, IMIDRA, Finca “El Encín″, A-II Km, 38.200, 28800, Alcalá de Henares, Madrid, Spain
2. Rhizosphere Science Laboratory, University of Kentucky, Department
of Plant and Soil Sciences, 1100 Nicholasville Road, Lexington, Kentucky 40546, United States