About the Authors
Institute of Botany, University of Basel, Basel, Switzerland
Fasteris SA, Plan-les-Ouates, Switzerland
Biology Department, Indiana University, Bloomington, Indiana, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: MMP TB LF. Performed the experiments: MA BKB JS EGG ASZ RR TB. Analyzed the data: JS LF MA MMP. Contributed reagents/materials/analysis tools: DW FV. Wrote the paper: MMP.