1. Institute of Plant Science, State Key Laboratory of Hybrid Rice, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China (W.C., K.Z., J. Shi, D.Z.); Department of Biology, Brookhaven National Laboratory, Upton, New York 11973 (X.-H.Y., J. Shanklin); Institute of Cellular and Molecular Botany, University of Bonn, D–53115 Bonn, Germany (S.D.O., L.S.)