1. Laboratoire de Reproduction et Développement des Plantes, Univ. Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRAE, Inria, F-69364 Lyon, France.
2. Laboratoire Physiologie Cellulaire et Végétale, Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG-DBSCI-LPCV, F-38054 Grenoble, France.
3. Instituto de Biología Molecular y Celular de Plantas (IBMCP), Consejo Superior de Investigaciones Científicas (CSIC) - Universidad Politécnica de Valencia (UPV), 46022 Valencia, Spain.
4. Dipartimento di Bioscienze, Università degli Studi di Milano, 20133 Milan, Italy.
5. Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA.
6. Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, CA 90095, USA.
7. School of Mathematical Sciences, University of Nottingham, Nottingham NG7 2RD, UK.
8. Department of Cell and Developmental Biology, John Innes Centre, Norwich NR4 7UH, UK.