1 Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung (IPK), Network Analysis and Modeling, D-06466 Seeland, OT Gatersleben; Germany (A.B.); and braeutigam@ipk-gatersleben.de.
2 Institute of Plant Biochemistry (U.S., M.E.) and Institute of Developmental and Molecular Plant Biology (U.G.), Cluster of Excellence on Plant Sciences, Heinrich Heine University, 40225 Düsseldorf, Germany braeutigam@ipk-gatersleben.de.
3 Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung (IPK), Network Analysis and Modeling, D-06466 Seeland, OT Gatersleben; Germany (A.B.); and.
4 Institute of Plant Biochemistry (U.S., M.E.) and Institute of Developmental and Molecular Plant Biology (U.G.), Cluster of Excellence on Plant Sciences, Heinrich Heine University, 40225 Düsseldorf, Germany.