1. Zurich-Basel Plant Science Center; Department of Environmental Sciences, Botany; University of Basel; Hebelstrasse 1; 4056; Basel; Switzerland
2. Laboratoire Commun de Microbiologie IRD/UCAD/ISRA; Département de Biologie Végétale; Université Cheikh Anta Diop (UCAD); BP 5005; Dakar; Sénégal
3. Biological Institute; University of Copenhagen; Øster Farimagsgade 2D; 1353; Copenhagen; Denmark
4. Department of Plant Pathology; University of Minnesota; St. Paul; MN; 55108; USA
5. Institute of Ecology and Earth Sciences; Tartu University; 14A Ravila; 50411; Tartu; Estonia