1. Institute of Crop Sciences, Quality of Plant Products, University of Hohenheim, Stuttgart, Germany
2. Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences, Controlled Environment Horticulture, Humboldt-University of Berlin, Berlin, Germany
3. Institute of Crop Sciences, Agronomy, University of Hohenheim, Stuttgart, Germany
4. Department of Biology, Plant Interactions Ecophysiology Group, University of Konstanz, Konstanz, Germany
5. Institute of Forest Sciences, Chair of Tree Physiology, University of Freiburg, Freiburg, Germany