1. INRES—Institute of Crop Science and Resource Conservation, Department of Horticultural Sciences, University of Bonn, 53121 Bonn, Germany
2. MED—Mediterranean Institute for Agriculture, Environment and Development & CHANGE—Global Change and Sustainability Institute, Crop Science Department, School of Sciences and Technology, University of Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal
3. Business Unit Greenhouse Horticulture, Wageningen University and Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands