1. Graduate School of Experimental Plant Sciences, Section of Phytopathology, Faculty of Biology, Utrecht University, Sorbonnelaan 16, 3584 CA Utrecht, The Netherlands
2. Developmental, Cell, and Molecular Biology Group, Department of Biology, Duke University, Durham, North Carolina 27708-1000
3. Pharmaceutical Biology, Julius-von-Sachs Institute of Biological Sciences, University of Wuerzburg, D-97082 Wuerzburg, Germany
4. Department of Biology, University of Fribourg, CH-1700 Fribourg, Switzerland
5. Cooperative Research Centre for Tropical Plant Pathology, University of Queensland, St. Lucia, Queensland 4072, Australia