1. Department of Soil Microbiology and Symbiotic Systems Estación Experimental del Zaidín (CSIC) Granada Spain
2. Present address: Metabolic Integration and Cell Signaling Group, Plant Physiology Section, Unidad Asociada a la EEZ‐CSIC, Dept Ciencias Agrarias y del Medio Natural, Universitat Jaume I Castellón Spain
3. Dipartimento di Biologia e Biotecnologie C. Darwin Sapienza Università di Roma Rome Italy