1. Department of Evolution of Plants and Fungi, Ruhr-Universität Bochum, Bochum 44801, Germany
2. U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
3. Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, CA 94720, USA
4. Department of Molecular and Cellular Botany, Ruhr-Universität Bochum, Bochum 44801, Germany