About the Authors
Karlsruhe Institute of Technology, Institute for Applied Biosciences, Department of Genetics, Karlsruhe, Germany
Max-Planck-Institute for Terrestrial Microbiology, Marburg, Germany
Friedrich-Alexander-University Erlangen-Nuremberg, Molecular Plant Physiology, Erlangen, Germany
The authors have declared that no competing interests exist.
The author(s) have made the following declarations about their contributions: Conceived and designed the experiments: RW KW JK NS. Performed the experiments: RW KW SG. Analyzed the data: RW KW JK NS. Wrote the paper: JK NS.