1. Department of Soil Science and Agricultural Chemistry, University of Santiago de Compostela (USC), Escuela Politécnica Superior , 27002 Lugo , Spain
2. Laboratory of Plant Ecophysiology, Department of Plant Biology and Soil Science, Faculty of Biology, University of Vigo , 36310 Vigo, Spain
3. CITACA, Agri-Food Research and Transfer Cluster, Campus da Auga, University of Vigo , 32004 Ourense , Spain