1. Division of Controlled Environment Horticulture, Faculty of Life Sciences Albrecht Daniel Thaer‐Institute of Agricultural and Horticultural Sciences, Humboldt‐University of Berlin Berlin 14195 Germany
2. Molecular Plant Physiology and Biophysics, Biocenter University of Würzburg 97082 Würzburg Germany
3. Department of Soil Science and Plant Nutrition Hochschule Geisenheim University 65366 Geisenheim Germany